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MAX3671 Low-Jitter Frequency Synthesizer with Selectable Input Reference

Industry's Best Jitter Performance Exceeds SerDes Reference Clock Specification

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Status

Active: In Production.

Description

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The MAX3671 is a low-jitter frequency synthesizer that accepts two reference clock inputs and generates nine phase-aligned outputs. The device features 40kHz jitter transfer bandwidth, 0.3ps_RMS (12kHz to 20MHz) integrated phase jitter, and best-in-class power-supply noise rejection (PSNR), making it ideal for jitter cleanup, frequency translation, and clock distribution in Gigabit Ethernet applications.

The MAX3671 operates from a single +3.3V supply and typically consumes 400mW. The IC is available in an 8mm x 8mm, 56-pin TQFN package, and operates from -40°C to +85°C.

An evaluation kit is available: MAX3671EVKIT

Key Features Applications/Uses

Two Reference Clock Inputs: LVPECL
Nine Phase-Aligned Clock Outputs: LVPECL
Input Frequencies: 62.5MHz, 125MHz, 250MHz, 312.5MHz
Output Frequencies: 62.5MHz, 125MHz, 156.25MHz, 250MHz, 312.5MHz
Low-Jitter Generation: 0.3ps_RMS (12kHz to 20MHz)
Clock Failure Indicator for Both Reference Clocks
External Feedback Provides Zero-Delay Capability
Low Output Skew: 20ps Typical

Clock Distribution
Frequency Translation
Gigabit Ethernet Routers and Switches
Jitter Cleanup