Numbers can lie -- but they're the best first step in determining whether a stock is a buy. In this series, we use some carefully chosen metrics to size up a stock's true value based on the following clues:

• The current price multiples.
• The consistency of past earnings and cash flow.
• How much growth we can expect.

Let's see what those numbers can tell us about how cheap integrated circuit maker Cirrus Logic (Nasdaq: CRUS) might be.

The current price multiples
First, we'll look at most investors' favorite metric: the P/E ratio. It divides the company's share price by its earnings per share -- the lower, the better.

Then, we'll take things up a notch with a more advanced metric: enterprise value to unlevered free cash flow. This divides the company's enterprise value (basically, its market cap plus its debt, minus its cash) by its unlevered free cash flow (its free cash flow, adding back the interest payments on its debt). Like the P/E, the lower this number is, the better.

Analysts argue about which is more important -- earnings or cash flow. Who cares? A good buy ideally has low multiples on both.

Cirrus Logic has a P/E ratio of 19.5 and an EV/FCF ratio of 34.8 over the trailing 12 months. If we stretch and compare current valuations to the five-year averages for earnings and free cash flow, Cirrus Logic has a P/E ratio of 21.4 and a five-year EV/FCF ratio of 35.0.

A one-year ratio under 10 for both metrics is ideal. For a five-year metric, under 20 is ideal.

Cirrus Logic is 0-for-4 on hitting the ideal targets, but let's see how it compares against some competitors and industry mates.

Company

1-Year P/E

1-Year EV/FCF

5-Year P/E

5-Year EV/FCF

Cirrus Logic

19.5

34.8

21.4

35.0

Texas Instruments (NYSE: TXN)

10.9

13.5

12.2

17.7

Linear Technology (Nasdaq: LLTC)

19.1

14.1

18.5

16.0

Maxim Integrated Products (Nasdaq: MXIM)

39.6

12.1

22.0

13.7

Source: Capital IQ, a division of Standard & Poor's.

Numerically, we've seen Cirrus Logic's valuation on both an absolute and relative basis. Next, let's examine ...

The consistency of past earnings and cash flow
An ideal company will be consistently strong in its earnings and cash flow generation.

In the past five years, Cirrus Logic's net income margin has ranged from -4.2% to 79.2%. In that same time frame, unlevered free cash flow margin has ranged from 10.2% to 18.8%.

How do those figures compare with those of the company's peers? See for yourself:

Source: Capital IQ, a division of Standard & Poor's; margin ranges are combined.

Additionally, over the last five years, Cirrus Logic has tallied up four years of positive earnings and five years of positive free cash flow.

Next, let's figure out ...

How much growth we can expect
Five-year analyst growth estimates tend to be comically overstated. If you accept them at face value, you will overpay for stocks. But while you should definitely take the analysts' prognostications with a grain of salt, they can still provide a useful starting point when compared to similar numbers from a company's closest rivals.

Let's start by seeing what this company's done over the past five years. In that time period, Cirrus Logic has put up past EPS growth rates of 35%. Meanwhile, Wall Street's analysts expect future growth rates of 25%.

Here's how Cirrus Logic compares it its peers for trailing five-year growth:

Source: Capital IQ, a division of Standard & Poor's; EPS growth shown.

And here's how it measures up with regard to the growth analysts expect over the next five years:

Source: Capital IQ, a division of Standard & Poor's; estimates for EPS growth.

The bottom line
The pile of numbers we've plowed through has shown us how cheap shares of Cirrus Logic are trading, how consistent its performance has been, and what kind of growth profile it has -- both on an absolute and a relative basis.

The more consistent a company's performance has been and the more growth we can expect, the more we should be willing to pay. We've gone well beyond looking at a 19.5 P/E ratio.

Cirrus has generally been profitable with high growth over the past five years. Analysts expect that growth to continue. Its current multiples reflect this. Still, the numbers are just a start.

If you find Cirrus Logic's numbers (or those of any of the other companies) compelling, don't stop. Continue your due diligence process until you're confident that the initial numbers aren't lying to you.

If you want more stock ideas, check out our featured articles. Or sign up for our latest free report in the box below.

Anand Chokkavelu doesn't own shares in any company mentioned. Linear Technology is a Motley Fool Stock Advisor pick. True to its name, The Motley Fool is made up of a motley assortment of writers and analysts, each with a unique perspective; sometimes we agree, sometimes we disagree, but we all believe in the power of learning from each other through our Foolish community. The Motley Fool has a disclosure policy.