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Clock synthesizer generates six LVTTL outputs at 35.328 MHz

Sunnyvale, Calif. — Maxim Integrated Products Inc. claims this cost-effective, low-jitter, high-performance clock synthesizer is a practical timing solution for network systems.

The clock generator, with a 8 kHz reference-clock input, is intended for use in asymmetric digital subscriber line/very high bit rate digital subscriber line (ADSL/VDSL) central-office (CO) linecards, T1/E1, T3/E3, and telecom network systems.

The device also uses a 35.328 MHz crystal to generate six identical, buffered low voltage transistor-transistor logic (LVTTL) outputs at 35.328 MHz, which are all synchronized with the 8 kHz input clock. The synthesizer has an integrated voltage-controlled crystal oscillator (VCXO) and can track the input reference by ±100 ppm. It also provides a low-jitter 8 kHz clock output that is used as a reference clock for other parts of the system. This clock generator can automatically detect the absence of the 8 kHz reference and lock the output clock to 35.328 MHz with an accuracy of ±25 ppm.

The MAX9476 is available in a 24-pin TSSOP package. The device operates from a single supply over the extended temperature range (-40°C to +85°C). Prices start at $6.14
(1000-up, FOB USA). Click here for the MAX9476 data sheet.

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

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