After years of strong growth and expanding margins, NXP Semiconductors (NASDAQ:NXPI) has hit a speed bump. The company reported mixed third-quarter earnings in October, with flat year-over-year revenue, and its guidance calls for big revenue declines in all of its segments during the fourth quarter. The company pointed to weakening demand because of an uncertain economic environment as the root cause of its disappointing guidance. Meanwhile, Credit Suisse reported earlier this month that Apple (NASDAQ:AAPL) had cut component orders by as much as 10%, a move that could hurt a wide variety of Apple's suppliers, including NXP.

However, these short-term issues don't change the long-term story, and NXP has a few major growth opportunities ahead of it. The company's merger with Freescale Semiconductor (NYSE:FSL), which is expected to close by the end of this year, will broaden the combined company's product portfolio and establish NXP as both the leading automotive semiconductor supplier and the leading general-purpose microcontroller supplier. Add to that NXP's current position as the leading provider of identification chips, and it's not hard to see the company's long-term growth potential.

Today, I'd like to talk about just one of NXP's growth opportunities.

The rise of mobile payments

Apple Pay in action. Image Source: Apple.

Apple wasn't the first company to introduce a mobile payment system. Alphabet's Google released its Google Wallet Android app way back in 2011, supporting exactly the same type of mobile payments as Apple Pay. But Google Wallet never really caught on, and it took Apple to bring mobile payments into the mainstream.

In addition to Apple Pay, there's now Android Pay, Google's second attempt at mobile payments, as well as Samsung Pay, which only works with certain Samsung devices. Even some big banks are trying to get in on the action. JPMorgan Chase recently announced its own mobile payments app, Chase Pay, which will launch next year.

All of these mobile payment apps work in essentially the same way; Credit cards are loaded into the apps, and when a store supports mobile payments, the phone is held near the payment terminal to complete the transaction. The phone communicates with the terminal using near field communication, or NFC, which requires the phone to have an NFC chip.

According to NXP's latest annual report, the company is the leader in the NFC chip market, with both Apple and Samsung listed as key OEMs for the company. The iPhone 6 was the first phone from Apple to contain an NFC chip, and on the Android side, NFC chips are being included in an increasing number of devices. NFC support in low-end and mid-range models is still hit-or-miss, though; the third-generation Moto G from Motorola, for example, doesn't support NFC and thus doesn't support Android Pay.

The real growth opportunity for NXP in the NFC market may be wearable devices. Being able to simply hold up one's wrist to a payment terminal to complete a transaction is something the Apple Watch can already do, and if the wearable-device market takes off in the coming years, mobile payments will probably be a core feature. IDC expects the number of smart wearable devices to grow at a 84.1% compound annual growth rate through 2019, reaching 89.4 million units, up from just 4.2 million in 2014.

NXP generated $1.47 billion from identification products, which include NFC chips, in 2014, growing by 13.3% compared to 2013 and accounting for 26% of the company's total revenue. The total identification chip market size was $3.3 billion in 2013, according to ABI Research, and by 2017 the market is expected to grow to $5.6 billion. This segment includes products other than NFC chips, like the chips that go into the new chip-and-signature credit cards now being used in the United States, and MIFARE products used in public transit systems.

NXP is a highly diversified semiconductor company, with a broad set of products and end markets, and the merger with Freescale will further diversify the resulting company. While growth in mobile payments and wearables represents a significant growth opportunity for the company, NXP isn't overly dependent on NFC chips. No OEM customer accounted for more than 10% of NXP's revenue during 2014, compared with some Apple suppliers that depend on the iPhone maker for the bulk of their sales.

While NXP's fourth quarter is set to be a rough one, with revenues slumping in all of its segments, the company is positioned to benefit from the growth of mobile payments and wearable devices. But because NXP is diversified, the company isn't defined by this growth opportunity. While many semiconductor companies are highly sensitive to winning or losing individual customers, NXP is protected by the breadth of its business. For investors, NXP offers both growth potential and relative safety compared with smaller, more concentrated competitors.

Timothy Green has no position in any stocks mentioned. The Motley Fool owns shares of and recommends Alphabet (A and C shares), Apple, and NXP Semiconductors. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.