MAX3674ECM2

Clock Generators, PLLs, Frequency Synthesizers Overview

The MAX3674ECM2 is a high-performance dual-output network clock synthesizer designed for networking, computing, and telecom applications. It integrates a crystal oscillator, low-noise PLL, programmable dividers, and LVPECL output buffers. The device generates output frequencies from 21.25MHz to 1360MHz with cycle-to-cycle jitter of 1.6ps RMS and period jitter of 0.9ps RMS at 500MHz. It operates on a +3.3V supply, consuming typically 396mW. Configuration is supported via a 2-wire I2C bus or parallel interface, enabling frequency margining. The component is housed in a 48-pin LQFP package and functions within a temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual differential LVPECL outputs with synchronous stop functionality
• Integrated crystal oscillator or selectable LVCMOS reference input
• Cycle-to-cycle jitter of 1.6ps RMS and period jitter of 0.9ps RMS at 500MHz
• Programmable output frequencies from 21.25MHz to 1360MHz

Clock Generators, PLLs, Frequency Synthesizers Applications

• Ethernet Network ASIC Clock Generation
• Storage Area Network ASIC Clocking
• Optical Network ASIC Clocking
• Frequency Margining

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the ordering suffix '2' indicates a lead-free/RoHS-compliant package configuration. Confirm the specific revision level against current Microchip Technology documentation to ensure compatibility with design requirements. Cross-reference the Mouser part number if available for distribution tracking.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when dual independent LVPECL clock signals are required with sub-picosecond jitter performance. Ensure the system supports either an external 16MHz crystal between XTAL1/XTAL2 or an LVCMOS reference clock. Verify that the host controller can interface with the I2C bus or parallel logic levels for dynamic frequency configuration.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MAX3674ECM2 belongs to the MAX3674 family of high-performance network clock synthesizers manufactured by Microchip Technology (formerly Maxim Integrated). The 'ECM2' designation specifies the commercial temperature range (-40°C to +85°C), the 48-pin LQFP package, and RoHS compliance. This variant is optimized for demanding clocking applications in server and communication systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

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