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723641 - Block Diagram


1K x 36 SyncFIFO, 5.0V

The 723641 is a 1K x 36 Sync FIFO memory that supports clock frequencies up to 67 MHz and has read access times as fast as 12ns. The FIFO memory has retransmit capability, which allows previously read data to be accessed again. Communication between each port may take place with two 36-bit mailbox registers. All data transfers through a port are gated to the LOW-to-HIGH transition of a continuous port clock by enable signals.


  • Free-running CLKA and CLKB can be asynchronous or coincident
  • Clocked FIFO buffering data from Port A to Port B
  • Synchronous read retransmit capability
  • Mailbox register in each direction
  • Programmable Almost-Full and Almost-Empty flags
  • Microprocessor interface control logic
  • Available in 132-pin PQFP and 120-pin TQFP packages
  • Industrial temperature range (–40C to +85C) is available

Product Specification

Core Voltage (V)Bus Width (bits)Density (Kb)Pkg. CodeInterfaceI/O TypeI/O Frequency (MHz)Cycle Time (ns)OrganizationTemp. RangeArchitectureAccess Time (ns)
53636PN120, PQ132, PQG132, PNG120Synchronous5.0 V TTL50.00, 66.001K x 36-40 to 85°C, 0 to 70°CUni-directional

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
723641L15PFObsoletePN120TQFP120CNoTrayCheck Availability
723641L15PF8ObsoletePN120TQFP120CNoReelCheck Availability
723641L15PFGActivePNG120TQFP120CYesTrayCheck Availability
723641L15PFG8ActivePNG120TQFP120CYesReelCheck Availability
723641L15PQFObsoletePQ132PQFP132CNoTrayCheck Availability
723641L15PQFGObsoletePQG132PQFP132CYesTrayCheck Availability
723641L20PFObsoletePN120TQFP120CNoTrayCheck Availability
723641L20PF8ObsoletePN120TQFP120CNoReelCheck Availability
723641L20PFIObsoletePN120TQFP120INoTrayCheck Availability
723641L20PFI8ObsoletePN120TQFP120INoReelCheck Availability
723641L20PQFObsoletePQ132PQFP132CNoTrayCheck Availability
723641L20PQFGIObsoletePQG132PQFP132IYesTrayCheck Availability
723641L20PQFIObsoletePQ132PQFP132INoTrayCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
723631-723651 Datasheet Datasheet PDF 342 KB Mar 24, 2014
PDN# : FS-13-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 86 KB Jan 21, 2013
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 14, 2012
PCN# : A-0610-02 ASAT China as Alternate Facility for CABGA/CVBGA/FPBGA/TQFP/PQFP Product Change Notice PDF 252 KB Oct 19, 2006
show all (15)
A-0603-04 Transfer TQFP and PQFP from ASAT HK to ASAT China Product Change Notice PDF 164 KB May 10, 2006
PCN# A-0506-01: New m/c G700 & d/a 8361J for PQFP Product Change Notice PDF 16 KB Aug 12, 2005
PCN A-0506-03; Packing Material Change Product Change Notice PDF 290 KB Jul 19, 2005
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products Product Change Notice PDF 80 KB Dec 14, 2004
PCN#: A-0310-01, Green Products Product Change Notice PDF 26 KB Oct 10, 2003
PCN#: G-0302-06, New die attach 3230 from Ablestik Product Change Notice PDF 150 KB Mar 20, 2003
PCN#G-0302-05, New mold compound EME-G700 series Product Change Notice PDF 65 KB Mar 20, 2003
PCN# G-0206-08, Orientation of square PQFP & TQFP Product Change Notice PDF 150 KB Jun 17, 2002
PCN# G-0203-05 Mold Compound Product Change Notice PDF 40 KB Apr 16, 2002
PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 11, 2001
F-01-01 Obsolescence of Selected Speed Grades Product Delete Notice PDF 31 KB May 23, 2001
PCN# G9911-05, To qualify low alpha mold compound. Product Change Notice PDF 44 KB Nov 18, 1999

Software & Tools

Title Type Format File Size Datesort icon
723641 HSPICE Model - HSPICE application/x-tar 40 KB Jun 29, 1999
723641 IBIS Model - IBIS ZIP 11 KB Jan 22, 1999