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723642 - Block Diagram


1K x 36 x 2 SyncBiFIFO, 5.0V

The 723642 is a monolithic Bidirectional SyncFIFO (clocked) memory. Two independent 1K x 36 dual-port SRAM FIFOs on board each chip buffer data in opposite directions. Communication between each port may bypass the FIFOs via two 36-bit mailbox registers. Each mailbox register has a flag to signal when new mail has been stored. The enables for each port are arranged to provide a simple bidirectional interface between microprocessors and/or buses with synchronous control.


  • Free-running CLKA and CLKB may be asynchronous or coincident
  • Two independent clocked FIFOs buffering data in opposite directions
  • Mailbox bypass register for each FIFO
  • Programmable Almost-Full and Almost-Empty flags
  • Supports clock frequencies up to 83MHz
  • Fast access times of 8ns
  • Available in 120-pin TQFP package
  • Industrial temperature range (–40C to +85C) is available

Product Specification

Core Voltage (V)Bus Width (bits)Density (Kb)InterfaceI/O TypeI/O Frequency (MHz)Cycle Time (ns)OrganizationArchitecture
53672Synchronous5.0 V TTL66.00, 83.001K x 36 x 2Bi-directional

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
723642L12PFObsoletePN120TQFP120CNoTrayCheck Availability
723642L12PF8ObsoletePN120TQFP120CNoReelCheck Availability
723642L12PQFObsoletePQ132PQFP132CNoTrayCheck Availability
723642L12PQFGObsoletePQG132PQFP132CYesTrayCheck Availability
723642L15PFObsoletePN120TQFP120CNoTrayCheck Availability
723642L15PF8ObsoletePN120TQFP120CNoReelCheck Availability
723642L15PFGActivePNG120TQFP120CYesTrayCheck Availability
723642L15PFG8ActivePNG120TQFP120CYesReelCheck Availability
723642L15PQFObsoletePQ132PQFP132CNoTrayCheck Availability
723642L15PQFGIObsoletePQG132PQFP132IYesTrayCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
723622-723642 Datasheet Datasheet PDF 183 KB Feb 19, 2015
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-0302-05, New mold compound EME-G700 series Product Change Notice PDF 65 KB Mar 20, 2003
PCN#: G-0302-06, New die attach 3230 from Ablestik Product Change Notice PDF 150 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
723642 HSPICE Model - HSPICE application/x-tar 40 KB Jun 28, 1999
723642 IBIS Model - IBIS ZIP 10 KB Jun 28, 1999