The 849S625I is a high frequency clock generator. The 849S625I uses an external 25MHz crystal to synthesize 625MHz, 312.5MHz, 156.25MHz and 125MHz clocks. The 849S625I has excellent cycle-to-cycle and RMS phase jitter performance. The 849S625I operates at full 3.3V supply mode and is available in a fully RoHS compliant 48-lead TQFP, E-Pad package.

Features

  • Ten selectable differential LVPECL or LVDS outputs
  • Output frequencies of 625MHz, 312.5MHz, 156.25MHz or 125MHz using a 25MHz crystal.
  • Crystal interface designed for a 25MHz, parallel resonant crystal
  • Cycle-to-cycle jitter: 25ps (maximum)
  • RMS phase jitter at 156.25MHz (1MHz - 20MHz): 0.375ps (typical), LVDS outputs
  • Output duty cycle: 53% (maximum)
  • Full 3.3V supply mode
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active PTQFP 48 I Yes Tray
Availability
Active PTQFP 48 I Yes Reel
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ICS849S625I Datasheet Datasheet PDF 481 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-831 The Crystal Load curve Application Note PDF 395 KB
AN-846 Termination - LVDS Application Note PDF 133 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 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-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 133 KB
AN-832 Timing Budget and Accuracy Application Note PDF 131 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 120 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 160 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-806 Power Supply Noise Rejection Application Note PDF 438 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
AN-803 Crystal Timing Budget and Accuracy for Renesas Timing Clock Products Application Note PDF 108 KB
PCNs & PDNs
PCN# : A1709-02 Add alternate assembly at OSET and Convert to Copper Wire Product Change Notice PDF 35 KB
PCN# : A1402-02 Alternate Assembly Locations Product Change Notice PDF 34 KB
Downloads
849S625I IBIS Model Model - IBIS ZIP 36 KB
Other
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB