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; 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 ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Package Buy Sample
5U49319NLG Obsolete VFQFPN 48 C Yes Tray Package Info
5U49319NLG8 Obsolete VFQFPN 48 C Yes Reel Package Info

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
5U49319 Datasheet Datasheet PDF 382 KB
Application Notes & White Papers
AN-891 Driving LVPECL, LVDS, CML, and SSTL Logic with IDT?s ?Universal? Low-Power HCSL Outputs Application Note PDF 480 KB
AN-831 The Crystal Load curve Application Note PDF 395 KB
AN-845 Termination - LVCMOS Application Note PDF 146 KB
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 128 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 115 KB
AN-839 RMS Phase Jitter Application Note PDF 233 KB
AN-832 Timing Budget and Accuracy Application Note PDF 131 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 143 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 136 KB
AN-801 Crystal-High Drive Level Application Note PDF 202 KB
AN-808 PCI Express/HCSL Termination Application Note PDF 137 KB
AN-806 Power Supply Noise Rejection Application Note PDF 438 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB