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5U49319 Block Diagram
5U49319 Pinout Diagram


Very Low Power Clock for Freescale MCU’S

The IDT5U49319 is a very low power clock for Freescale P10xx and P20xx MCU’s. It uses a 1.5V core and Low-Power HCSL (LP-HCSL) differential outputs for minimal power consumption. The SATA and SRC outputs are PCIe Gen1/2 compatible.


  • Various outputs are configurable to run in power down; supports Wake_On_LAN
  • FPGA clock frequency is selectable via SMBus; allows low-power system standby
  • Strapping pin sources SRC outputs from either spreading or non-spreading PLL; maximum system flexibility
  • FLEX clock is pin selectable to be FPGA clock or USB PHY clock; maximum system flexibility
  • TEST pin tri-states all outputs; speeds up board test
  • External 25MHz crystal such as the IDT 603-25-150 (25 MHz); supports tight ppm
  • OE# pins; support SRC power management
  • Low power differential clock outputs; reduced power and board space
  • Differential outputs internally terminated to 100ohm differential impedance; reduced board space
  • Space-saving 7x7mm 48-pin VFQFPN with 0.5mm pad pitch; reduced board space without the need for fine pitch assembly techniques

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
5U49319NLGActiveNLG48P1VFQFPN48CYesTrayCheck Availability
5U49319NLG8ActiveNLG48P1VFQFPN48CYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
5U49319 Datasheet Datasheet PDF 311 KB Apr 21, 2015
Apps Notes & White Papers
AN-891 Driving LVPECL, LVDS, CML, and SSTL Logic with IDT's "Universal" Low-Power HCSL Outputs Application Note PDF 354 KB Dec 10, 2015
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
show all (16)
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 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-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-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 15, 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
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016