MAX3673ETN+

Clock Generators, PLLs, Frequency Synthesizers Overview

The MAX3673ETN+ is a low-jitter frequency synthesizer manufactured by Analog Devices / Maxim Integrated. It accepts two differential LVPECL reference clock inputs and generates nine phase-aligned LVPECL outputs. The device operates from a single +3.3V supply, typically consuming 400mW. Key electrical specifications include an integrated phase jitter of 0.3ps RMS (12kHz to 20MHz), a PLL jitter transfer bandwidth of 40kHz, and a VCO center frequency of 2.457GHz. It supports input frequencies of 61.44MHz, 122.88MHz, 245.76MHz, and 307.2MHz, with output frequencies configurable up to 307.2MHz. The component is housed in an 8mm x 8mm, 56-pin TQFN package with an exposed pad and functions within a temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates nine phase-aligned LVPECL clock outputs from two selectable LVPECL reference inputs.
• Achieves 0.3ps RMS integrated phase jitter (12kHz to 20MHz) with 40kHz jitter transfer bandwidth.
• Supports external feedback for zero-delay buffer configuration via the FB_SEL pin.
• Includes clock failure indicators (IN0FAIL, IN1FAIL) and a PLL lock indicator (LOCK).

Clock Generators, PLLs, Frequency Synthesizers Applications

• 3G Wireless Base Stations
• Frequency Translation
• Jitter Cleanup
• Clock Distribution

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix ETN+ against current manufacturer documentation to confirm lead-free/RoHS compliance and package type. Confirm availability status as distribution data may vary. Ensure the exposed pad is properly connected to ground for thermal and electrical performance during assembly.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low-jitter clock synthesis is required for wireless base-station architectures. Ensure the design accommodates the 56-pin TQFN-EP package dimensions. Verify that the power supply can provide the necessary current while maintaining noise levels below the deterministic jitter thresholds specified in the datasheet.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MAX3673ETN+ belongs to the MAX3673 family of low-jitter frequency synthesizers. It integrates a PLL with configurable dividers, a 2:1 mux for reference selection, and multiple LVPECL outputs. The 'ETN+' designation indicates the specific temperature range (-40°C to +85°C), package style (TQFN-EP), and lead-free/RoHS-compliant construction.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.