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MK1725 - Block Diagram
MK1725 - Pinout


Quad Output Spread Spectrum Clock Generator

The MK1725 generates 4 high-quality, high-frequency spread spectrum clock outputs. It is designed to replace spread spectrum clock generators and a buffer in many digital consumer applications. Using ICS' patented Phase Locked Loop (PLL) techniques, the device runs from a lower frequency clock or crystal input. The MK1725 has a 16 location ROM table which provides maximum flexibility for system designers. The chip also has a power down pin which can be used to reduce power.


  • Packaged in 16-pin TSSOP
  • Available in Pb (lead) free package
  • Replaces a spread spectrum clock generator and a buffer
  • Input clock or crystal frequency of 20-34 MHz
  • Output frequency of 20-136 MHz
  • Four spread spectrum clock outputs
  • Duty cycle of 45/55
  • Operating voltage of 3.3 V
  • Advanced, low power CMOS process

Product Specification

Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
CMOS, TTL, LVCMOS20.000000 - 160.000000, 20.000000 - 136.00000020.000000 - 34.0000001LVCMOS, Crystal13.33.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MK1725GLFObsoletePGG16TSSOP16CYesTubeCheck Availability
MK1725GLFTRObsoletePGG16TSSOP16CYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
MK1725 Datasheet Datasheet PDF 215 KB Mar 31, 2009
PDN# : U-12-03R4 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 72 KB Jun 20, 2013
PDN# : U-12-03R3 Product Discontinuation Notice PDF 72 KB Mar 31, 2013