The 87604I is a 1:4 PCI/PCI-X Clock Generator. The 87604I has a selectable REF_IN or crystal input. The REF_IN input accepts LVCMOS or LVTTL input levels. The 87604I has a fully integrated PLL along with frequency configurable clock and feedback outputs for multiply-ing and regenerating clocks with "zero delay". The PLL's VCO has an operating range of 250MHz - 500MHz, allowing this device to be used in a variety of general purpose clocking applications. For PCI/PCI-X applications in particular, the VCO frequency should be set to 400MHz. This can be accomplished by supplying 33.33MHz, 25MHz, 20MHz, or 16.66MHz on the reference clock or crystal input and by selecting ÷12, ÷16, ÷20, or ÷24, respectively as the feedback divide value. The divider on the output bank can then be configured to generate 33.33MHz (÷12), 66.66MHz (÷6), 100MHz (÷4), or 133.33MHz (÷3). The 87604I is characterized to operate with its core supply at 3.3V and the bank supply at 3.3V or 2.5V. The 87604I is packaged in a small 6.1mm x 9.7mm TSSOP body, making it ideal for use in space-constrained applications.


  • Fully integrated PLL
  • Four LVCMOS/LVTTL outputs, 15? typical output impedance
  • Selectable crystal oscillator interface or LVCMOS/LVTTL REF_IN clock input
  • Maximum output frequency: 166.67MHz
  • Maximum crystal input frequency: 38MHz
  • Maximum REF_IN input frequency: 41.67MHz
  • Individual banks with selectable output dividers for generating 33.333MHz, 66.66MHz, 100MHz and 133.333MHz
  • Separate feedback control for generating PCI / PCI-X frequencies from a 16.66MHz or 20MHz crystal, or 25MHz or 33.33MHz reference frequency
  • VCO range: 250MHz to 500MHz
  • Cycle-to-cycle jitter: 120ps (maximum)
  • Period jitter, RMS: 20ps (maximum)
  • Output skew: 65ps (maximum)
  • Static phase offset: 160ps ± 160ps
  • Voltage Supply Modes: V DD /V DDA DDO 3.3/3.3/3.3 3.3/3.3/2.5
  • -40°C to 85°C ambient operating temperature
  • Available in both standard (RoHS 5 and lead-free (RoHS 6) packages

Product Options

注文可能な製品ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type 購入/サンプル
87604AGILF Last Time Buy DQG28 TSSOP 28 I Yes Tube
87604AGILFT Last Time Buy DQG28 TSSOP 28 I Yes Reel

Documentation & Downloads

タイトル 他の言語 タイプ 形式 サイズ 日付
87604I Datasheet Datasheet PDF 285 KB
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-845 Termination - LVCMOS Application Note PDF 146 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-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 160 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 120 KB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PDN# : CQ-19-01(R1) Quarterly Market Declined PDN Product Discontinuation Notice PDF 1014 KB
PDN# : CQ-19-01 Quarterly Market Declined PDN Product Discontinuation Notice PDF 537 KB
PCN# : A1503-02R1 Assembly Location Transfer from ATP to OSET Product Change Notice PDF 33 KB
PCN# : A1503-02 Transfer Assembly Location Product Change Notice PDF 31 KB
87604I IBIS Model Model - IBIS ZIP 67 KB
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Clock Generation Overview (日本語) English Overview PDF 1.83 MB
IDT Clock Distribution Overview (日本語) English Overview PDF 3.79 MB

Boards & Kits