DB1900GS-Derative Frequency Gearing Clock for Intel CPU, PCIe Gen2 & Fully Buffered DIMM Clocks

The IDT9FG1904B-1 follows the Intel DB1900GS Differential Buffer Specification, except for the output groupings. This buffer provides 19 output clocks for CPU Host Bus, PCI-Express, or Fully Buffered DIMM applications. The outputs are configured with two groups. Both groups, DIF_(14:0) and DIF_(18:15) can be equal to or have a gear ratio to the input clock. A differential CPU clock from a CK410B+ main clock generator, such as the IDT932S421, drives the IDT9FG1904B-1. The IDT9FG1904B-1 can provide outputs up to 400MHz.

Features

  • Power up default is all outputs in 1:1 mode
  • DIF_(14:0) can be "gear-shifted" from the input CPU Host Clock
  • DIF_(18:15) can be "gear-shifted" from the input CPU Host Clock
  • Spread spectrum compatible
  • Supports output clock frequencies up to 400 MHz
  • 8 Selectable SMBus addresses
  • SMBus address determines PLL or Bypass mode
  • Dedidated Power Down Pin

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
9FG1904BK-1LF Active NLG72P1 VFQFPN 72 C Yes Tray Availability
9FG1904BK-1LFT Active NLG72P1 VFQFPN 72 C Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
9FG1904B-1 Datasheet Datasheet PDF 227 KB Aug 2, 2007
PCNs & PDNs
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB Dec 19, 2016
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 27, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 12, 2015
PCN# : A1311-03R1 Alternate Assembly Locations Product Change Notice PDF 43 KB Feb 15, 2014
PCN# : A1311-03 Alternate Assembly Locations Product Change Notice PDF 140 KB Dec 2, 2013
PCN# : A1308-01 Add ASEK as Alternate Assembly for VFQFPN-72 Product Change Notice PDF 103 KB Aug 17, 2013
PCN# : A1305-01 Gold Wire to Copper Wire Product Change Notice PDF 148 KB Jul 28, 2013
PDN K07-02 Product Delete Notice PDF 103 KB Jul 11, 2007

Software & Tools

Title Other Languages Type Format File Size Date
9FG1904-1 IBIS Model - IBIS ZIP 9 KB Oct 9, 2007