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Silicon Laboratories Inc (SLAB -1.97%)
Q2Â 2019 Earnings Call
Jul 24, 2019, 8:30 a.m. ET
Contents:
- Prepared Remarks
- Questions and Answers
- Call Participants
Prepared Remarks:
Operator
Good morning. My name is Nicole and I will be your conference operator today. At this time, I would like to welcome everyone to Silicon Labs Second Quarter Fiscal 2019 Earnings Conference Call. [Operator Instructions] After today's presentation, there will be an opportunity to ask questions. [Operator Instructions]. Please note this event is being recorded.
I would now like to turn the call over to Jalene Hoover, Director of Investor Relations and International Finance. Jalene, please go ahead.
Jalene Hoover -- Director of Investor Relations and International Finance
Thank you Nicole and good morning, everyone. Tyson Tuttle, Chief Executive Officer and John Hollister, Chief Financial Officer are on today's call. We will discuss our financial performance and review our business activities for the second quarter. After our prepared comments, we will take questions. Our earnings press release and the accompanying financial tables are available in the Investor Relations section of our website at www.silabs.com. This call is also being webcast and a replay will be available for four weeks.
Our comments today will include forward-looking statements subject to risks and uncertainties. We base these forward looking statements on information available to us as of the date of this conference call and assume no obligation to update these statements in the future. We encourage you to review our SEC filings, which identify important risk factors that could cause actual results to differ materially from those contained in any forward-looking statements. Additionally, during our call today we will refer to certain non-GAAP financial information. A reconciliation of our GAAP to non-GAAP results is included in the company's earnings press release and also on the Investor Relations section of Silicon Labs website.
I would now like to turn the call over to Silicon Lab Chief Financial Officer, John Hollister.
John Hollister -- Senior Vice President and Chief Financial Officer
Thanks, Jalene. I am pleased to report solid execution in Q2 with sales rebounding for Q1 as we had expected. Revenue for Q2 ended at $207 million, in line with expectations and up about $19 million or 10% sequentially. Non-GAAP earnings exceeded the top-end of our guidance range at $0.83 per share. Despite lingering macro weakness in the industry, IoT delivered a strong quarter with wireless products achieving record sales due to ramps in lighting, smart home, metering and the broader industrial IoT end markets. Total Q2 IoT sales were $125 million, up 17% sequentially and just shy of a record. IoT sales represented 60% of consolidated second quarter revenue, which is an all-time high. Infrastructure revenue was $44 million or 21% of Q2 revenue and down about 4% sequentially with China trade issues negatively impacting timing product sales. Isolation revenue was up slightly for the quarter. Broadcast revenue was flat in Q2 at $26 million and roughly 13% of our total revenue mix. Access revenue rebounded in Q2, up 24% sequentially to $12 million or about 6% of total revenue.
Looking at second quarter revenue by end-market, IoT drove growth in industrial and consumer. Automotive and Computing were about flat and Communications was down primarily due to weakness in timing. Revenue increased across all geographies, propelled by strength in IoT with the Americas showing the largest sequential growth followed by APAC and Europe. Distribution mix ended at 73%, up 2% from Q1 with distributor inventory days declining sequentially, reflecting an overall healthy state of channel inventory. No end-customer accounted for more than 10% of our revenues.
Non-GAAP gross margin ended strong for the quarter at 61.6%, which was about 1 percentage point higher than expected due to product mix and supply chain efficiencies realized in the quarter. Non-GAAP OpEx was slightly favorable to expectations at $88 million and flat to Q1. Non-GAAP R&D expenses increased to $50 million on employee related costs and higher takeout costs. Non-GAAP SG&A was down by about $2 million from Q1, ending at $38 million on lower payroll taxes and insurance costs. Non-GAAP operating margin ended stronger than we expected for the quarter at 19.2% due to in-line revenue, positive gross margin and favorable OpEx. Our non-GAAP effective tax rate was 11.6%. Non-GAAP EPS ended at $0.83, just above the top-end of our guidance range. The diluted share count for the quarter was 44 million shares outstanding, up slightly from Q1.
Looking at our GAAP P&L results, gross margin ended the quarter at 61.5%. GAAP R&D expenses were $64 million. GAAP SG&A expenses were $49 million which includes approximately $1 million in acquisition-related expenses. GAAP operating margin was 7% for the quarter. Stock compensation expense for the quarter was $14 million and amortization of intangible assets was $10 million, both inline with expectations. During the quarter, the Ninth Circuit Court of Appeals ruled in favor of the IRS in the Altera case and as a result, we recorded a $28 million GAAP tax charge to our provision related to a deferred tax asset previously recognized in connection with inter-company cost-sharing arrangements. The charge had a $0.64 per share negative impact on earnings, resulting in a $0.37 GAAP loss per share for the second quarter. This adjustment had no cash flow impact for the quarter.
Turning now to the balance sheet. We ended the quarter with cash and investments of $647 million. Accounts receivable ended up slightly at $72 million or 31 day sales outstanding. Inventory ended at $74 million. As expected, our inventory turns improved in the quarter to 4.3 times due to greater shipments and effective supply chain management. Operating cash flow for the six-month year-to-date period was $71 million, up about 40% from the same period in fiscal 2018. Our long term debt balance was stable at $400 million, representing approximately two times EBITDA leverage. We continue to have additional borrowing capacity of up to $500 million under our bank credit agreement. We have executed approximately $27 million in share repurchases thus far in 2019.
Over the past 18 months, our repurchases have totaled $66 million, allowing us to retire more than 700,000 shares of common stock. We have about $134 million remaining in our share repurchase authorization through the end of this fiscal year. In summary, our balance sheet and overall financial profile are in great shape.
I will now cover guidance for the third quarter. We expect Q3 revenue to increase to a range of $213 million to $223 million with IoT and broadcast up access flat and infrastructure down due to ongoing China trade headwinds. On a non-GAAP basis, we expect gross margins to be 60%. We expect non-GAAP OpEx to increase to approximately $89 million. We expect non-GAAP earnings per share to be in the range of $0.79 to $0.89. We anticipate our non-GAAP effective tax rate will increase to around 12.5% due to some discrete charges for the quarter. On a GAAP basis, we expect gross margin to be around 60% and GAAP OpEx to be approximately $112 million. We expect GAAP earnings per share to be in the range of $0.29 to $0.39 with an expected diluted share count of 44.5 million shares. We anticipate an approximate 10.5% GAAP effective tax rate for the quarter.
I will now turn the call over to Tyson.
Tyson Tuttle -- President and Chief Executive Officer
Thank you, John. We grew second quarter revenue 10% sequentially despite macro headwinds impacting the semiconductor industry. We are gaining traction in our target markets with total design win lifetime revenue establishing a new record, up 25% year-on-year. Second quarter IoT revenue outperformed expectations with strong sequential gains led by wireless. Wireless products achieved more than 1 billion units shipped to-date and established record revenue in Q2, now representing more than 65% of IoT revenue. Our IoT opportunity funnel now exceeds $8 billion, up about 30% year-on-year, demonstrating the overall expansion of IoT markets and the competitiveness of our solutions as we convert the pipeline of opportunities into design wins.
Despite China trade headwinds, we saw solid sequential growth in our MCU products in Q2. During the quarter, we announced the adoption of our microcontrollers in the latest smart lock products from Yunding an innovative smart device and cloud-based service provider and a key member of the Xiaomi Ecosystem. Silicon Labs, Yunding and a group of leading Chinese companies are collaborating in a new initiative to develop safety standards for the smart lock industry and guidelines for technical innovation. This type of collaboration is increasingly important as we -- to ensuring we develop the right software to enable IoT technologies in diverse markets and geographies.
During the quarter, we announced a collaboration with Notion on a battery powered smart home sensor that detects water leaks, smoke, carbon monoxide and temperature changes. The Notion solution allows users to easily monitor their homes through a smartphone app and spot problems early on to mitigate damage. The Notion sensor is built on Silicon Labs Wireless Gecko platform, using design complexity through the low power consumption, flexible multi-protocol connectivity and leading wireless performance.
We are the leading provider of mesh networking solutions for the low-powered wireless end nodes including Zigbee, Bluetooth Mesh and Z-Wave. We see growing opportunity in target market segments including home automation, security, smart metering, smart lighting and gateways where IoT ecosystems are proliferating worldwide and are gaining strong traction with Alarm.com, Amazon, Comcast, Google Home, Signify, Samsung SmartThings, Tuya, U.K. Smart Energy, Xiaomi and many others.
We are deeply engaged in smart lighting, which is redefining home automation through simple affordable do-it-yourself solutions. As the leading IoT technology for smart lighting, Zigbee has played a key role in driving smart home innovation and adoption. Today, Zigbee is used in 80% of all smart LED light bulbs sold from retailers such as Amazon, Best Buy and Home Depot.
During the quarter, we announced our collaboration with Signify, the world leader in lighting to help ecosystem partners develop smart light switches for Philips Hue systems. The Friends of Hue ecosystem allows third party vendors to build certified, interoperable smart lighting products, which integrate seamlessly with Philips Hue, the leading Zigbee-based smart lighting solution. Silicon Labs is a key friends of Hue partner and has worked closely with Signify to provide compliant Zigbee software, enabling advanced light switch functionality. With 20 years of experience in Mesh Networking, Silicon Labs is strengthening the Friends of Hue program with our deep mesh networking expertise, leading software and wireless development tools.
No other company offers Z-Wave, the leading smartphone mesh connectivity solution used in 3,000 certified interoperable products and adopted by more than 700 companies worldwide. In Q2, we launched Z-Wave 700, now running on our Series 1 Wireless Gecko platform and offering multiple benefits to customers including increased range, longer battery life, wider temperature range and multi-protocol capabilities. We are aggressively promoting the Z-Wave alliance to drive increased adoption across multiple ecosystems, market expansion into new device types and the convergence of standards and in nodes and gateways to simplify the end-user experience.
We are driving industry leading Bluetooth and Bluetooth mesh road-maps to deliver best-in-class cost and power efficiency and are well positioned to capture share in this multi-billion dollar market. Our footing in proprietary wireless, especially in commercial and industrial IoT applications is solid, supporting more than 50 customer stacks on our easy-to-use radio abstraction interface layer or rail software. Having multiple connectivity standards under one roof strengthens our influence on the evolution and adoption of wireless standards and targeted IoT market segments. We differentiate ourselves from the competition by combining multiple wireless capabilities onto the same platform, developing our own standards based wireless protocols rather than licensing stacks from third-parties and optimizing our hardware and software to work seamlessly together.
We're making significant progress with our next generation Series 2 Wireless Gecko platform, which offers best-in-class integration, wireless range, battery life, security and cost and are heavily engaged with alpha customers since the release of the first product in April. We continue to drive an aggressive road-map to further our differentiation and market leadership. Our long-term commitment to developing the industry-leading IoT platform of silicon, software and solutions is resonating with our customers, enabling them to future proof their designs, upgrade to new features, reuse their hardware and software investments in ways not possible with single-point solutions. Offering a comprehensive hardware platform, a common software development environment and simplicity across the portfolio with easy-to-use tools and modules is critical to efficiently scaling across thousands of applications and tens of thousands of customers in the IoT market.
Turning now to infrastructure, macro conditions and trade tensions continue to impact revenue. Second quarter infrastructure revenue was down 4% sequentially and approximately 15% year-on-year with declines in timing and isolation products. Timing and isolation each delivered record lifetime revenue design wins in the second quarter, signaling the strong market traction going forward. Network equipment providers are racing to develop higher speed, higher capacity gear to support 5G net wireless traffic. This transition is driving the need for higher performance timing solutions for fronthaul backhaul, metro core and data center applications. During the quarter, we announced new jitter attenuating clocks with a fully integrated crystal, improving system reliability and performance while simplifying PCB layout and high-speed networking designs. Our new jitter attenuators address the demanding reference clock requirements of next generation communications designs.
New 5G features that minimize intercell interference and optimize spectral capacity require precise IEEE-1588 packet-based timing synchronization in Radio Access Networks and Wired Networks carrying 5G traffic. To meet the growing demand for this functionality in Q2, we introduced a family of high performance clocks supporting IEEE-1588 and synchronous Ethernet. These new clocks combine Silicon Labs patented DSPLL technology with standards compliant software to offer a complete solution and to simplify the adoption of IEEE-1588 in wireless backhaul, IP Radio, small and macro cell wireless systems and data center switches.
We believe we are uniquely positioned to address the IoT and infrastructure markets where we continue to invest and have established leadership positions. Tens of thousands of customers worldwide choose Silicon Labs because they want to work with a technology leader focused on the big picture and offering a long-term commitment, which is a key driver of the growth we are seeing in the channel in our pipeline and in our design win momentum. We believe we have the right technical expertise, are developing the right solutions and are investing in the right segments to continue to outperform the market.
Thank you for your time and attention. Before we take your questions, I'd like to turn the call back to Jalene.
Jalene Hoover -- Director of Investor Relations and International Finance
Thank you, Tyson. Before we open the call for the question-and-answer session, I would like to announce our participation in upcoming conferences, including KeyBanc Capital Markets 21st Annual Technology Leadership Forum in Vail on August 12 and Citi's Global Technology Conference in New York on September 4th.
We would now like to open the call up for your questions. To accommodate as many people as possible before the market opens, we ask that you please limit your questions to one with one follow-up. Nicole?
Questions and Answers:
Operator
Thank you. We will now begin the question-and-answer session. [Operator Instructions] Our first question comes from Blayne Curtis of Barclays. Please go ahead.
Blayne Curtis -- Barclays Investment Bank -- Analyst
Hey, guys. Thanks for taking my question. Maybe first Tyson, your involvement with the SIA is maybe have a good perspective here. Just on Huawei, seems like Texas Instruments is back reshipping. And I know there's a lot of subtleties here, but I'm just kind of curious your perspective. It seems like your forecast, you have them out. I'm just kind of curious your view on what the status of this is and whether you think you can eventually restart shipment?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. Blayne, this is John. With respect to Huawei, it's a complex issue. There are different products that have different types of export control designations. Over the past few months, we've been working closely with the SIA as well as external counsel to understand the landscape. And in light of that, we have resumed some shipments were possible with Huawei and to view the Q3 guide that we have out this morning as more of a normalized level of business with Huawei. The China ecosystem remains very important to us and we continue to gain traction out of the market with Xiaomi and others as we indicated on the prepared comments.
Blayne Curtis -- Barclays Investment Bank -- Analyst
Thanks for that. And then I just want to ask you, you mentioned in the IoT lighting was the first when you mentioned, you highlighted again 80% Zigbee. I was wondering if you could just walk us through, one, just any view on the market over the next couple of years and then within that 80% of Zigbee, can you just give us the competitive landscape? That would be helpful. Thank you.
Tyson Tuttle -- President and Chief Executive Officer
So Silicon Labs is the leader in Zigbee. We've got a 15-year plus history developing mesh networking software and have a dominant position in the Zigbee market. And Zigbee has been very successful in lighting. One of the reasons is because in lighting applications, you actually have to support very high temperatures. When you optimize the cost of the bulbs, you want to run them as close to the limit as possible and our solutions have been one of the few that have supported the requirements of lighting.
From a software standpoint, we've got the leading Zigbee stack and development environment and interoperability and have had a lot of success with the leading consumer as well as commercial and industrial lighting manufacturers. I think that benefit of Zigbee is the robustness of the mesh network compared to WiFi applications and the fact that it works without a mobile phone, so they typically use of a gateway. You've seen that the integration of those gateways into things like the Amazon Alexa and other control points so that you can get rid of the gateway and you can talk to those and we see a growing trend to the integration of Zigbee into gateways by the operators and ecosystem providers. So that provides a kind of an ease of installation. We've also seen pretty good traction with the retailers in promoting these. We've seen the cost curves come down on smart lighting and so we anticipate that smart lighting in general and the the attach of smart lighting compared to just a regular bulb, that percentage to go up over-time so we see this as a nice tailwind for us and we feel like we have a very strong competitive position to maintain our share.
Blayne Curtis -- Barclays Investment Bank -- Analyst
Okay.
Operator
Our next question comes from Matt Ramsay of Cowen. Please go ahead.
Matthew Ramsay -- Cowen and Company, LLC -- Analyst
Thank you very much. Good morning. Tyson, I wanted to follow up a little bit on Blayne's question around infrastructure and timing in particular. It sounds like you guys are calling for the timing business to be down sequentially into September and John just commented that you guys had included sort of a normal run rate quarter for Huawei. So maybe you can talk a little bit about the market overall or for your timing products and where there might be softness and what in particular you think might be causing that if your shipments to Huawei are resuming? Thanks.
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. Matt, this is John. So we see a good long-term opportunity in the timing market and see a good design win traction in 5G with customers around the world in that market. The opportunity at Huawei is down from where it was previously based on the trade issues and Huawei worked through that. It's a partial recovery of where we were previously related to that based on the export control designations as I talked about. But longer-term, we continue to see a very good opportunity in the timing market, but yeah, you're right. We did highlight infrastructure as an overall category to be down in the third quarter sequentially.
Tyson Tuttle -- President and Chief Executive Officer
Yeah. I think I can add a little bit of color to that. You've got Huawei's inability to ship product because of the unavailability of some components that are required within there, their solution. So we anticipate that Huawei shipments will be challenged and that you look at what China is doing in terms of capex and 5G rollout, they're going to pause a little bit and wait for Huawei to catch-up. And so within China, the anticipation is that there will be a bit of a slowdown in deployments of 5G infrastructure, which really drives a lot of the the overall capex within China. If you look globally, you've got a lot of political pressures to move out away from Huawei and into other vendors and so that tends to move shipments around and also cause some churn in terms of the share changes and things like that and that takes a little bit of time. So we think that is actually favorable to non-Huawei non-China vendors of equipment. We do see that there is a bit of an impact of that on overall demand, but overall will be a vendor shift. And just if you look at our timing business in general, we shift to essentially everyone all of the major vendors and telecom equipment both wired, really the majority of the revenue is still on traditional optical high speed networking wireline type communications applications. We have a growing opportunity in wireless and 5G and have four out of the top five vendors there. So as share shifts change, we view that as kind of fairly neutral to our business. But overall, we see that the market is maybe a little bit challenged given the trade tensions and the ban on Huawei.
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. Matt, this is John. Just one more comment, then you can follow-up. The macro continues to apply some lingering pressure out there as well. We're very pleased with our performance in the second quarter and pleased to guide sequential growth overall for the company in third quarter, but we were just commenting on timing also for isolation, there is some some lingering headwinds related to the macro environment.
Matthew Ramsay -- Cowen and Company, LLC -- Analyst
Got it. Thanks guys for all the color. Just a follow up and sort of related to the mix of the business infrastructure versus IoT. Was pleased to see the upside in gross margin despite sort of the mix change and just looking back over a year ago, I think the IoT business is now, what, seven points higher in your revenue mix and infrastructure is down, yet gross margin is flat. So John maybe you could talk us through a little bit on gross margins or there are some upside leverage you're using within the IoT business or some improvements with scale there and are some of these margin things maybe sustainable going forward? Thank you.
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. I think it's a combination of those factors. We're pleased with the hard work from our operations team to adjust some things in the supply chain to drive greater efficiencies in the model. Also the addition of Z-Wave into the mix has helped gross margins. We improved the Z-Way gross margins about 500 basis points from the time of the acquisition. So really good performance there. Looking ahead into the third quarter of course, it's a seasonally high quarter for consumer applications, led by broadcast video that tends to drag margins a little bit. So we are pleased with the execution there. On a longer-term basis, we're holding the 58% to 60% range and see the ability to really drive growth at somewhat lower gross margin may add some pressure, but we're definitely pleased with what we see right now.
Matthew Ramsay -- Cowen and Company, LLC -- Analyst
Thank you very much.
Operator
Our next question comes from Gary Mobley of Wells Fargo Securities. Please go ahead.
Gary Mobley -- Wells Fargo Securities, LLC -- Analyst
Good morning everyone. Thanks for taking my question. The question about OpEx. Your non-GAAP OpEx has been running between $87 million and $88 million for each of the past five quarters essentially keeping the dog in the leash so to speak and as your revenue improves, look into the future and I guess beginning in Q3 and perhaps into 2020, are you going to let the dog run free with respect to OpEx or how should we think about the rate of increase in OpEx as revenues begin to improve?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. Gary, so we have controlled OpEx a bit this year, but at the same time, we're keeping our eye longer term on the objectives to grow IoT and infrastructure and broadcast automotive and want to continue investing in those areas. We're going to be meeting with the management team and Board of Directors through the course of this fall and I think heading into 2020, early part of the year, we should be able to provide some more color on the expectation for 2020 OpEx, but in light of the industry decline in the first quarter, we did draw back a little bit and you're seeing the continuing benefits from that, but yes, we will need to step up the investment level with continued growth in the business and that is what we intend to do.
Gary Mobley -- Wells Fargo Securities, LLC -- Analyst
Okay. I want to clarify something on Huawei for the just reported June quarter. I think in late May, you have quantified potentially at $3 million impact for the June quarter as it relates to Huawei shipment ban. Was that in fact the case for the quarter?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. That's roughly accurate. We did pick up shipments right toward the end of the quarter, but that is accurate. Yes.
Gary Mobley -- Wells Fargo Securities, LLC -- Analyst
All right. Thank you, guys.
Operator
Our next question comes from Suji Desilva of Roth Capital. Please go ahead.
Sujeeva Desilva -- Roth Capital Partners, LLC -- Analyst
Hi guys. You talked about inventory kind of returning to normal levels. I'm wondering if you expect to shift to consumption going forward or whether there'll be further draw-down in a conservative macro environment and if the China 8-and-32-bit microcontrollers are kind of returning to normal growth levels in the second half '19 or if the inventory would affect that as well.
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. Suji, this is John. So yeah, we view inventory at the company and at our distribution partners as being at a healthy level and do not see that in and of itself creating a headwind in the business. It's hard to really read directly into the customers' inventory levels themselves, but certainly for the distribution partners, we see that as normalized and positive. On the 8 and 32 bit MCU side on China, there is some continuing weakness in that portion of the market relative to the Chinese economy and we'll have to see how things play out if PMI and manufacturing levels can pick up in China. That should be good for our 8 bit MCUs in China. But we'll have to see how that shakes out.
Sujeeva Desilva -- Roth Capital Partners, LLC -- Analyst
Okay. And another question, just specific question on IoT and the Smart Energy Program, the transition there in UK, did that create some sort of ordering a ramp-up that might mitigate and be lumpy or a bit steady progress going forward with the transition to SMETS program?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. So the transition is making good progress and I don't see a lot of lumpiness there. I see steady recovery there. That was depressed more in 2018 and now that the SMETS 2 transition is ongoing and really settling-in in the market, that's creating more of a steady level of business there.
Sujeeva Desilva -- Roth Capital Partners, LLC -- Analyst
Okay. Thanks guys.
Operator
Our next question comes from Ruben Roy of Benchmark. Please go ahead.
Ruben Roy -- The Benchmark Company, LLC -- Analyst
Thank you, Tyson, first to follow up on Suji's question on IoT and sort of customer behavior. I think industrial was a little weak back in Q1. And I'm just wondering how you'd assess or characterize what you're hearing from customers in terms of the overall market environment. Are they still cautious, would you say or I know that you talked about design activity continuing to be strong. But I'm just wondering in terms of sort of the near-to-medium-term trends on demand, how you're feeling about IoT in particular?
Tyson Tuttle -- President and Chief Executive Officer
Overall, we're feeling very bullish about IoT. If you look at at the deployment of IoT technologies broadly, we see and this is really independent of any sort of macro commentary, you see a growing proliferation of applications of use cases of really the need to integrate connectivity and IoT functionality into a broad range of applications and every year we're seeing a steady increase in the volumes, in the opportunities, in the number of customers, the number of programs at each customer that is very encouraging. And I think the fact that we have really the leading IoT in this node platform that supports all of the different various wireless standards that supports legacy standards, we've mentioned in the call that we've got over 50 customers stacks with proprietary protocols running on our solution, you could run that at the same time, a Zigbee or a Bluetooth connection to a phone and that flexibility to be able to remain compatible with legacy solutions, but also evolve into the future and the fact that we're committed long-term has really resonated well with the customer base.
So I would say that, you look at the opportunity funnel in IoT we are at about $8 billion of opportunity and we've been able to drive substantial year-on-year, our design wins are on-track. We've been ahead of track on about a 30% year-on-year increase for increasing the design win numbers. And so that portends well to the continued strength of the IoT markets and I think that if you look at our investments in our Series 2 and in software and in the development tools and really simplifying the user experience. The big challenge is that the opportunity is just massive for IoT, but the biggest challenge is to be able to efficiently support all of those and efficiently convert all these different applications. It's a very broad range of applications. There's tens of thousands of customers and you've got to rely on your channel partners and the fact that you could just make this stuff work easily and it's complicated technology, it takes time for customers to really get their arms around the apps and the Cloud and the business models, but every year, we see improvements and progress in the markets, in the technology, and in the standards and we're really excited about where we are.
Ruben Roy -- The Benchmark Company, LLC -- Analyst
Hey, thanks for that, Tyson. I guess just follow-up. Obviously, wireless is going well for you guys. There's been a bit of consolidation in wireless/connectivity assets over the last several months. And I'm just wondering, on the one hand, it obviously validates the value of those assets in IP. On the other hand, I'm wondering if you have an early view on how the competitive environment might shape-up over the next several quarters or years?
Tyson Tuttle -- President and Chief Executive Officer
Yeah. So first, I want to say that that our IoT wireless is really primarily command and control, be it in the deployment of sensors and sensing applications where it's actually very low data rate and very low duty cycle, but where you have to have very good energy efficiency and those are the markets where we see that $8 billion of opportunity, that's everything from Bluetooth to Z-Wave to Zigbee to a lot of the proprietary technologies that we've got and that is really unrelated to what the consolidation that's been going on in the industry. We've seen lot of the legacy WiFi assets, some of those going into access points. We've partnered with a lot of folks on making sure that these low data rate that command and control IoT technologies get integrated into the gateways, especially with a lot of ecosystem providers. But that's not a market that we're chasing or in terms of the WiFi for Access points. So that's -- Marvell had a decent solution there. You've got Qualcomm, Broadcom, and MediaTek playing in those areas.
And then a lot of the WiFi, the consolidation has also been around Wi-Fi that has basically been the redeployment of cellphone technologies into some number of IoT applications. And that's things like printers and TVs, and video cameras, things that are plugged into the wall where you need a higher data rate and you need to have wireless connectivity similar to what you would have on a tablet or a phone or a PC and that's been the primary driver of the IoT market. You've seen what Cypress acquired from Broadcom and now that's going over to Infineon, but those are really different class of applications where we have competed. We have introduced our first WiFi solution, it's an 802.11 and optimized for ultra-low power and so that is actually able to scale WiFi a bit down into battery powered applications. Things like a few smart locks and a few lighting applications, but overall the cost and the power consumption of WiFi has kept it from really being able to compete in these like more mainstream sensing IoT applications.
I would say that going forward, the WiFi, we'll continue to see improvements in power consumption whereas continuing to monitor the evolution of standards as they deploy WiFi 6 and 11ax and so that's a very interesting technology, but our growth in IoT is not really impacted by the consolidation that we're seeing right now and our opportunity remains in areas outside of WiFi. We see a big opportunity on the Bluetooth side to gain market share there. We've got a multi-billion-dollar funnel on Bluetooth and a leading stack on Bluetooth mesh and that's an exciting trend as well and we continue to invest aggressively there and see a lot of opportunities, especially actually in China.
Ruben Roy -- The Benchmark Company, LLC -- Analyst
Very helpful. Thanks, Tyson.
Operator
Our next question comes from Tore Svanberg with Stifel. Please go ahead.
Tore Svanberg -- Stifel, Nicolaus & Company, Incorporated -- Analyst
Yes, thank you and congratulations on the results. So, first of all, your IoT revenue is back to $500 million run rate and you kind of lost $19 million there in Q4 and Q1 and you made it all back here last quarter. Is there a way you could talk about how much of those are the supply chain catching back-up versus new business, is there any way to look at it that way?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah, Tore. Looking at, I don't have precise breakdowns on those dimensions, but what we see here is strong secular growth coming from the new areas, the new applications that we have been talking about, very good traction in the smart home and security, home automation and home security market with a good uptick in business there. Lighting is more of a new application where we have very good market share and lighting design wins and applications and are seeing those ramp now whereas that was a few quarters on the com and it's really performing well now. Metering has recovered and I would probably put that more in the supply chain recovery side of what you were describing, but by and large, the growth we're seeing is secular and driven by emerging IoT applications and across the range of connectivity, across Zigbee and Bluetooth and Z-Wave and proprietary wireless, these are where we are seeing good traction of the market.
Tyson Tuttle -- President and Chief Executive Officer
Yeah. I think actually if you look within IoT, we've got a microcontroller piece and then we've got the wireless piece. The microcontroller piece has been impacted by macro. I mean, if you look at microcontrollers overall year-on-year, they are down about 15% within that IoT number. Wireless on the other hand has been growing, it was up over 20% in the last quarter. And that's really driven by that design win funnel and all the new applications and new customers that we're bringing online and we're guiding IoT up here into the third quarter. And so the growth that we're seeing on wireless is really from the growth in the markets and also the traction that we've got with customers, but you still have a macro component of this that's still working through in terms and that's primarily impacting the microcontroller. You can think of that possibly impacting some amount of the wireless, but I think that the design win traction and the growth there is swamping that out.
Tore Svanberg -- Stifel, Nicolaus & Company, Incorporated -- Analyst
That's very helpful. And as a follow-up and maybe back to the whole connectivity consolidation that's been happening, just kind of want your perspective Tyson? I mean, do you think this is happening now because customers are basically telling also the companies, hey, you have to have connectivity in your portfolio if you want to be a significant player now. And if that's the case, how does that really position Silicon Labs vis-a-vis some of your main competitors?
Tyson Tuttle -- President and Chief Executive Officer
Yeah. So we believe that we have leadership positions in all of the low speed connectivity and the lower data rate is really appropriate for the majority of these IoT applications where you've got, you're sensing and you're having to deploy low cost sensors around, and the cost points and the robustness that you get with mesh networking are very important. So that is really unrelated to -- we've been seeing a lot of the legacy WiFi and Bluetooth, the connectivity combos for phones that was part of the Marvell asset. That's what the Cypress asset is. And then you've got, there's a lot of WiFi and connectivity in automotive. I think I was a big part of NXP pulling in that wireless asset. And then you've got Access points. For instance, Quantenna was the -- they were playing in Access points, they didn't really have much else to put around that and competing with the big guys like Qualcomm and Broadcom and MediaTek and you had Marvell in there a little bit. So, you've got Access, you've got automotive and then you've got IoT applications and then you've got the emergence of new standards and investments required to be able to address those.
So I think that a lot of the microcontroller companies, I guess on, you've got Infineon, you've got NXP looking to pick up these IoT, the WiFi legacy, WiFi assets, but we don't see those as essential to the growth in the markets that we're trying to address although we do see convergence longer term and that's why we've been investing our own organic WiFi efforts as those applications start to proliferate.
Tore Svanberg -- Stifel, Nicolaus & Company, Incorporated -- Analyst
Very helpful. Thank you.
Operator
Our next question comes from Rajvindra Gill of Needham & Company. Please go ahead.
Rajvindra Gill -- Needham & Company, LLC -- Analyst
Yes. Thank you for taking my questions. I appreciate it. Question, Tyson on your commentary around 5G in China slowing down. Just trying to reconcile that with some of the recent developments going on in China where the China is releasing spectrum at a much soon or expected and a lot of the Chinese telcos are tendering for base stations much faster than expected. So just wanted to kind of reconcile your commentary about potential slowdown in deployment in Chinese 5G base stations given the fact that there seem to be some commentary going in the other direction?
Tyson Tuttle -- President and Chief Executive Officer
Yeah. My commentary on the China slowdown was relative to before the export controls were placed onto Huawei, there was a rapid rollout of 5G in China. When we're on our last call, we talked a lot about the opportunity around 5G and a lot of that was being driven by China. We see that because of the export controls and the inability for Huawei to procure all the components required for all their equipment that they're -- then there's been a lot of commentary around this in the analyst community about the pace of 5G rollout in China taking a pause and waiting for Huawei to able to catch back-up. So it's really relative to that accelerated pace that I had commented on before.
Rajvindra Gill -- Needham & Company, LLC -- Analyst
Okay. That's very clear. And from my follow-up, this is more kind of a long-term question. But when you look at connectivity for IoT, how do you think about 5G for IoT applications? It seems one of the main purposes of 5G is to enable machine-to-machine communications, so how do you think about getting cellular capability if that's even needed to kind of support from the next-generation IoT applications that might be on cellular versus [Indecipherable] technologies?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. So I think you have to really break the connectivity technologies down into classifications. You've got personal area networks that essentially are talking to your phone. So you can think about Bluetooth and Bluetooth low energy talking from your phone to a device and that's kind of a point-to-point. You do have some expansion of that into the Bluetooth mesh, but really your Access to the network is through a mobile device. Then you've got a local area network, which connects to the Internet through an access point or something like that and that's application, WiFi is in that category, you've got Zigbee, you've got Z-Wave and those types of standards and that's where we're really playing is in that personal area network and local area network where this is free spectrum that you can deploy at will, you're not depending on a career, you don't have to go get a subscription, as long as you've got Internet access those work. And so, for a lot of industrial applications they want to know the networks there, they want to have control within your home. You've got your Internet service in China, actually they use a lot of times using the mobile phones as some of the personal area network technologies are more prevalent over in some of the Asian markets.
And then you've got the wide area network stuff, which has traditionally been M-to-M [Phonetic], I mean we've seen cellular modems for everything from street lighting to parking meters to asset tracking where you have to be untethered from a location. So you're -- it can roam, if you're trying to track your dog or track your luggage or track your shipment or a scooter or a lot of these applications typically that also involves location technology. So, you have to have GPS GNSS technology along with that and that's traditionally had a higher power consumption and a higher cost point. We've seen with the deployment of things like Laura, which, again, is kind of a mix. That's kind of a more, it's unlicensed spectrum and you've got to deploy your own network. We've seen the deployment of that, but this is really, it's sort of like wider area networks and not really competing with the technologies that we're in and then you've got all the narrowband IoT and LTE Cat-M, which is a cellular standard, you've got to go through an operator and those markets are still very, very early. You've seen a number of companies invest there and the number of applications starting to pick up, but we haven't really seen the high-volume applications in that area. It's more industrial and that's not -- you're not going to deploy 100 sensors in your house each with a cellular connection and each with talking to an operator.
That's going to be a long time coming. So we're being very cautious in our -- we're monitoring this market, we're understanding the technology, but also are cognizant of the fact that there is multiple obstacles to the deployment of that both in terms of the availability of solutions, the operators and just the overall market applications where that's more appropriate compared to the LAN and PAN technologies.
Rajvindra Gill -- Needham & Company, LLC -- Analyst
Very good. Thank you.
Operator
Our next question comes from Alessandra Vecchi of William Blair. Please go ahead.
Alessandra Vecchi -- William Blair & Company -- Analyst
Hi, guys. Just continuing on acquisition front. You've always talked about the potential for future tuck-in acquisitions. Do you see like the recent environment of things getting bought breeding valuations or how are you currently viewing the environment for additive acquisitions for you guys?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. This is John. So, acquisitions have been an important part of our strategy over the last several years, as we have built-out our software team in particular and added some good complementary adjacent technology and revenue sources into the story and that's worked well for us. The The Z-Wave acquisition last year has gone well. We continue to survey the landscape and look for additional acquisition opportunities, which could include tuck-ins for sure and also could involve some larger scale targets, but really looking to add to the organic story to the company is the primary strategy that we have.
Tyson Tuttle -- President and Chief Executive Officer
Yeah. I would also just reiterate that we have talked in the past. Most of the or all the acquisitions that we've done since 2012 have been related to IoT adding in additional capabilities to the team as we built-out the portfolio and the technology stacked around IoT. We have indicated that we would consider an acquisition on the infrastructure side. We have very strong pillars within our timing business and within our isolation business and those would not be off-limits in terms of a tuck-in acquisition as well. So while as we've been primarily focused on IoT and we remain optimistic about a number of different opportunities there, we would also consider something on the infrastructure side to scale that business as well.
Alessandra Vecchi -- William Blair & Company -- Analyst
That makes sense. And then just one last question on the timing side of the business. John, I think last quarter you had sort of implied that the wireless side of timing with double year-on-year, I know Huawei probably changes that a tiny smidge. But in general, do you view that as tracking this year?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. We see the opportunity to grow the wireless business, doubling it is less likely now, but we do continue to see the opportunity to grow that business in 2019.
Alessandra Vecchi -- William Blair & Company -- Analyst
Thanks. That's it for me.
Operator
Our next question comes from Cody Acree of Loop Capital. Please go ahead.
Cody Acree -- Loop Capital Markets LLC -- Analyst
Yeah. Thanks for taking my questions. If you can go back to China and the infrastructure business, I understand the macro and the trade concerns, but as you are seeing that as a fairly recent event, do you believe that your customers still have any inventory that they're still working through or is this simply a matter of tracking in demand and then how does that compare to the rest of your infrastructure business globally?
Tyson Tuttle -- President and Chief Executive Officer
Yeah. Cody, I think again it's hard to hard to redirect the end customers. It's certainly from the distribution channel perspective. I think the inventory is relatively healthy and we should be tracking closer to end market demand and don't really see a wide geographical difference in that metric.
Cody Acree -- Loop Capital Markets LLC -- Analyst
And John just a follow-up then, so gross margin, nice step up this quarter, step back forward September, the IoT business has grown in both those cases, infrastructure has declined in both those cases, you mentioned that one of the drivers that was IoT starting to get some better efficient, maybe better leverage, maybe better gross margin products in that mix. So I'm curious with similar trends in the end markets, are you seeing some seasonal shifts within IoT or what may be is driving that one-point decline?
John Hollister -- Senior Vice President and Chief Financial Officer
Yeah. It's primarily the seasonal uptick in consumer, which is more led by broadcast. So, we continue to have very strong market position in the video market. That business is picking up in the third quarter as we head into the Christmas build season, but that uptick does come in a bit lower to gross margin.
Cody Acree -- Loop Capital Markets LLC -- Analyst
Okay. Thank you.
Operator
This concludes our question-and-answer session. I would like to hand the call back over to Jalene Hoover.
Jalene Hoover -- Director of Investor Relations and International Finance
Thank you, Nicole and thank you all for joining us this morning. This concludes today's call.
Operator
[Operator Closing Remarks]
Duration: 57 minutes
Call participants:
Jalene Hoover -- Director of Investor Relations and International Finance
John Hollister -- Senior Vice President and Chief Financial Officer
Tyson Tuttle -- President and Chief Executive Officer
Blayne Curtis -- Barclays Investment Bank -- Analyst
Matthew Ramsay -- Cowen and Company, LLC -- Analyst
Gary Mobley -- Wells Fargo Securities, LLC -- Analyst
Sujeeva Desilva -- Roth Capital Partners, LLC -- Analyst
Ruben Roy -- The Benchmark Company, LLC -- Analyst
Tore Svanberg -- Stifel, Nicolaus & Company, Incorporated -- Analyst
Rajvindra Gill -- Needham & Company, LLC -- Analyst
Alessandra Vecchi -- William Blair & Company -- Analyst
Cody Acree -- Loop Capital Markets LLC -- Analyst
