MAX3671ETN2

Clock Generators, PLLs, Frequency Synthesizers Overview

The MAX3671ETN2 is a low-jitter frequency synthesizer featuring two selectable LVPECL reference clock inputs and nine phase-aligned LVPECL outputs. It operates from a single +3.3V supply, consuming approximately 400mW. The device integrates a PLL with a 2.5GHz VCO to generate frequencies of 62.5MHz, 125MHz, 156.25MHz, 250MHz, or 312.5MHz. Key electrical specifications include an integrated phase jitter of 0.3ps RMS (12kHz to 20MHz), a jitter transfer bandwidth of 40kHz, and typical output skew of 20ps. It is housed in a 56-pin TQFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual LVPECL reference inputs with automatic clock failure detection and switching
• Nine differential LVPECL outputs organized into two configurable groups
• Ultra-low jitter generation: 0.3ps RMS (12kHz to 20MHz)
• External feedback capability for zero-delay buffer applications

Clock Generators, PLLs, Frequency Synthesizers Applications

• Gigabit Ethernet routers and switches
• Frequency translation systems
• Jitter cleanup circuits
• Clock distribution networks

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'ETN2' against the manufacturer's official documentation to confirm pinout, temperature range, and lead-free status. Datasheet ordering information lists 'MAX3671ETN+' as the standard -40°C to +85°C variant in a 56-pin TQFN-EP package. Ensure compatibility with required termination voltages and logic levels.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low phase noise and high power-supply noise rejection are critical. The device supports input frequencies up to 312.5MHz and provides flexible output divider configurations via four-level control pins. Ensure the application can accommodate LVPECL signaling requirements and provide appropriate 50Ω termination networks for the differential outputs.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MAX3671 belongs to Maxim Integrated's family of precision clock generators designed for network infrastructure. It utilizes a proprietary PLL architecture to achieve best-in-class power-supply noise rejection. The device is optimized for Gigabit Ethernet environments where signal integrity and precise timing alignment between multiple clock domains are mandatory.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify functional equivalence regarding LVPECL voltage levels, jitter performance, and package dimensions if considering alternative manufacturers.