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m902-01 - Block Diagram
m902-01 - Pinout


VCSO Based GBE Clock Generator

The M902-01 is a PLL (Phase Locked Loop) based clock generator that uses an internal VCSO (Voltage Controlled SAW Oscillator) to produce a very low jitter output clock. It is ideal for Gigabit Ethernet. The output clock (frequency of 156.25 or 187.50MHz for example) is provided from two LVPECL clock output pairs. (Specify frequency at time of order.) The accuracy of the output frequency is assured by the internal PLL, which phase-locks the internal VCSO to the reference input frequency (25 or 30MHz for example). The input reference can either be an external crystal, utilizing the internal crystal oscillator, or a stable external clock source such as a packaged crystal oscillator.


  • Output clock frequency from 125MHz to 190MHz (Consult factory for frequency availability)
  • Two identical LVPECL output pairs
  • Integrated SAW (surface acoustic wave) delay line
  • Low jitter 0.5ps rms (over 12kHz-20MHz)
  • Ideal for Gigabit Ethernet clock reference
  • Output-to-output skew < 100ps
  • External XTAL or LVCMOS reference input
  • Selectable external feed-through clock input
  • STOP clock control (Logic 1 stops output clocks)
  • Industrial temperature grade available
  • Single 3.3V power supply
  • Small 9 x 9 mm SMT (surface mount) package

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeCore Voltage (V)Phase Jitter Typ RMS (ps)
2LVPECL156.250000, 187.50000025.000000, 30.0000001LVCMOS, Crystal3.30.500

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
M902-01-187.5000ObsoleteCG36CLCC36CYesTubeCheck Availability
M902-01-187.5000TObsoleteCG36CLCC36CYesReelCheck Availability
M902-01I156.2500ObsoleteCG36CLCC36IYesTubeCheck Availability
M902-01I156.2500TObsoleteCG36CLCC36IYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013
PDN# : Z-13-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 71 KB Mar 19, 2013