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VersaClock® 5 Low Power Programmable Clock Generator with Integrated Crystal

The 5P49V5935 is a programmable clock generator intended for high performance consumer, networking, industrial, computing, and data communications applications. Configurations may be stored in on-chip One-Time Programmable (OTP) memory or changed using an I2C interface. This is IDT’s fifth generation of programmable clock technology (VersaClock® 5). The 5P49V5935, by default, uses an integrated 25 MHz crystal as an input reference. It also has a redundant external clock input. A glitchless manual switchover function allows selection of either input reference during normal operation.

Two select pins allow up to 4 different configurations to be programmed and accessible using processor GPIOs or bootstrapping. The different selections may be used for different operating modes (full function, partial function, partial power-down), regional standards (US, Japan, Europe) or system production margin testing. The device may be configured to use one of two I2C addresses to allow multiple devices to be used in a system.


  • 4 differential outputs LVPECL, LVDS, HCSL - or 4 LVCMOS outputs
  • <0.7 ps RMS typical phase jitter on outputs
  • Four fractional output dividers (FODs)
  • Independent Spread Spectrum capability on each output pair
  • Stores 4 different configurations in OTP non-volatile memory
  • Up to 350 MHz input/output frequencies
  • Redundant clock inputs with manual switchover
  • Programmable loop bandwidth, output to output skew, slew rate control
  • Individual output enable/disable
  • Meets PCIe® Gen1/2/3, USB 3.0, 1/10 GbE clock requirements
  • 1.8 / 2.5 / 3.3V core and output voltages
  • 4x4 mm 24-pin VFQFPN package
  • -40° to +85°C operating temperature range
  • Supported by IDT Timing Commander™  software tool

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Skew (ps)Additive Phase Jitter Typ P-P (fs)
5LVDS, HCSL, LVPECL, LVCMOS1.000000 - 350.0000001.000000 - 350.0000002HCSL, LVDS, LVPECL, LVCMOS, Crystal (integrated)41.8, 2.5, 3.375

Product Options

This device is customizable. Choose from the options below, or use the Custom Part Configuration Utility now.
Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
5P49V5935A000LTGINot Recommended
LTG24LGA24IYesTrayCheck Availability
5P49V5935A000LTGI8Not Recommended
LTG24LGA24IYesReelCheck Availability
5P49V5935B000LTGIActiveLTG24LGA24IYesTrayCheck Availability
5P49V5935B000LTGI8ActiveLTG24LGA24IYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
5P49V5935 Datasheet Datasheet PDF 425 KB May 4, 2016
User Guides & Manuals
VersaClock 5 Programmer Board User Guide Manual PDF 461 KB Dec 7, 2015
VersaClock 5 Family Register Descriptions and Programming Guide Manual - User Reference PDF 514 KB Dec 3, 2015
VersaClock 5 Timing Commander Users Guide Manual - Software PDF 1.94 MB Oct 6, 2015
show all (5)
VersaClock 5 Evaluation Board Users Guide Manual - Eval Board PDF 636 KB Apr 28, 2015
Timing Commander Installation Guide Guide PDF 497 KB Oct 7, 2013
Apps Notes & White Papers
AN-909 PCB Layout Considerations for Designing IDT VersaClock 3S, 5 and 6 Clock Products Application Note PDF 743 KB Jul 1, 2016
AN-918 Programmable Clocks vs Crystal Oscillators Application Note PDF 221 KB Mar 10, 2016
AN-912 VersaClock 5 and VersaClock 6 In-System Programming Application Note PDF 61 KB Dec 3, 2015
show all (11)
AN-862 5P49V5901 Register Programming Guide Application Note PDF 91 KB Jun 26, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
AN-846 Termination - LVDS Application Note PDF 50 KB May 13, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-808 PCI Express/HCSL Termination Application Note PDF 54 KB Jan 15, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 15, 2014
PCN# : W1602-01 300mm wafer size from 200mm wafer size at Global Foundries Product Change Notice PDF 344 KB Feb 20, 2016
PCN# : MM1510-01 Programming Configuration Change on Versa Clock Product Change Notice PDF 243 KB Oct 29, 2015
VersaClock Family of Programmable Clocks Overview 日本語 Overview PDF 598 KB Jan 18, 2016
5P49V5933 / 5P49V5935 VersaClock® 5 Programmable Clocks with Integrated Crystal Product Brief 简体中文 Product Brief PDF 945 KB May 19, 2015
5P49V5935 Reference Schematic Schematic PDF 29 KB May 12, 2015
show all (4)
VersaClock 5 Programmer Board Schematic Schematic PDF 30 KB Oct 2, 2014

Software & Tools

Title Type Format File Size Datesort icon
5P49V5935 IBIS Model Model - IBIS ZIP 399 KB May 8, 2015
Timing Commander Installer v1.7.3.3 Software ZIP 17.87 MB May 12, 2016
VersaClock 5 Timing Commander Personality File Software TCP 2.94 MB Oct 5, 2015

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