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5V925BI - Block Diagram
5V925BI - Pinout


Programmable LVCMOS/LVTTL Clock Generator

Alternative Products
NOTICE - The following device(s) are recommended alternatives:
Functional replacement

The IDT5V925BI is a high-performance, low skew, low jitter phase-locked loop (PLL) clock driver. It provides precise phase and frequency alignment of its clock outputs to an externally applied clock input or internal crystal oscillator. The IDT5V925BI has been specially designed to interface with Gigabit Ethernet and Fast Ethernet applications by providing a 125MHz clock from 25MHz input. It can also be programmed to provide output frequencies ranging from 3.125MHz to 160MHz with input frequencies ranging from 3.125MHz to 80MHz. The IDT5V925BI includes an internal RC filter that provides excellent jitter characteristics and eliminates the need for external components. When using the optional crystal input, the chip accepts a 10-30MHz fundamental mode crystal with a maximum equivalent series resistance of 50?. The on-chip crystal oscillator includes the feedback resistor and crystal capacitors (nominal load capacitance is 18pF).


  • 3V to 3.6V operating voltage
  • 3.125MHz to 160MHz output frequency range
  • Four programmable frequency LVCMOS/LVTTL outputs
  • Input from fundamental crystal oscillator or external source
  • Balanced drive outputs ±12mA
  • PLL disable mode for low frequency testing
  • Select inputs (S[1:0]) for divide selection (multiply ratio of 2, 3, 4, 5, 6, 7 and 8)
  • 5V tolerant inputs
  • Low output skew/jitter
  • External PLL feedback, internal loop filter
  • -40°C to 85°C ambient operating temperature
  • Available in Lead-free (RoHS 6) package

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
4LVCMOS25.000000 - 160.00000010.000000 - 160.0000002LVCMOS, Crystal23.33.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
5V925BQGIObsoletePCG16QSOP16IYesTubeCheck Availability
5V925BQGI8ObsoletePCG16QSOP16IYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
IDT5V925BI Datasheet Datasheet PDF 208 KB Mar 10, 2016
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
show all (16)
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 8, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 6, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 5, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 15, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 15, 2014