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Clock generator reduces EMI

Dallas — Dallas Semiconductor's crystal-based clock generator has an integrated phase-locked loop (PLL) to generate clock outputs, three pin-selectable multiplier rates, and three dither magnitudes to reduce electromagnetic interference (EMI).

Cycle-to-cycle jitter is 75 ps. To conserve power, the DS1080L clock generator has a spread-spectrum disable mode and a power-down mode. Applications include automotive, cable modems, cell phones, computer peripherals, copiers, PCs and printers.

When used with a low-cost 16 MHz to 34.4 MHz crystal, the DS1080L can generate 16 MHz to 134 MHz output frequencies with pin-selectable integer multipliers of 1, 2, and 4. Pin-selectable center-spread dither magnitude choices are 0 percent (disabled), ±0.5 percent, ±1.0 percent, ±1.5 percent. Using the spread-spectrum DS1080L for the system clock can simplify or eliminate shielding and filtering, according to the company.

The DS1080L offers 3.0 V to 3.6 V operation over the automotive temperature range of -40°C to +125°C. It is available in an 8-pin uSOP. Pricing begins at 87 cents (10,000-up, FOB USA). Click here for the preliminary DS1080L data sheet.

Dallas Semiconductor/Maxim, , 1-800-998-8800, www.maxim-ic.com.

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