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71342 - Block Diagram


4K x 8 Dual-Port RAM w/Semaphore

The 71342 is a high-speed 4K x 8 Dual-Port Static RAM containing a fully independent semaphore logic block to assist in arbitrating between ports. This block contains unassigned flags which can be accessed by either side, however, only one side can control the flag at any time. An automatic power down feature, controlled by CE and SEM, permits the on-chip circuitry of each port to enter a very low standby power mode (both CE and SEM HIGH).


  • True Dual-Ported memory cells which allow simultaneous access of the same memory location
  • Fully asynchronous operation from either port
  • Full on-chip hardware support of semaphore signaling between ports
  • Battery backup operation—2V data retention (LA only)
  • TTL-compatible
  • single 5V (±10%) power supply
  • Available in 52-pin PLCC and 64-pin TQFP packages
  • Industrial temperature range (–40C to +85C) is available

Product Specification

Core Voltage (V)Bus Width (bits)Density (Kb)Pkg. CodeInterfaceI/O TypeAccess Time (ns)I/O Frequency (MHz)Temp. RangeArchitectureOrganizationFunctionOutput Type
5832PN64, PL52, PNG64, PLG52Async5.0 V TTL20, 25, 35, 45, 55, 70-40 to 85°C, 0 to 70°CDual-Port4K x 8Semaphore

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
71342LA20JActivePL52PLCC52CNoTubeCheck Availability
71342LA20J8ActivePL52PLCC52CNoReelCheck Availability
71342LA20JGActivePLG52PLCC52CYesTubeCheck Availability
71342LA20JG8ActivePLG52PLCC52CYesReelCheck Availability
71342LA20PFActivePN64TQFP64CNoTrayCheck Availability
71342LA20PF8ActivePN64TQFP64CNoReelCheck Availability
71342LA20PFGActivePNG64TQFP64CYesTrayCheck Availability
71342LA20PFG8ActivePNG64TQFP64CYesReelCheck Availability
71342LA25JActivePL52PLCC52CNoTubeCheck Availability
71342LA25J8ActivePL52PLCC52CNoReelCheck Availability
71342LA25JGIActivePLG52PLCC52IYesTubeCheck Availability
71342LA25JGI8ActivePLG52PLCC52IYesReelCheck Availability
71342LA25JIActivePL52PLCC52INoTubeCheck Availability
71342LA25JI8ActivePL52PLCC52INoReelCheck Availability
71342LA25PFActivePN64TQFP64CNoTrayCheck Availability
71342LA25PF8ActivePN64TQFP64CNoReelCheck Availability
71342LA25PFIActivePN64TQFP64INoTrayCheck Availability
71342LA25PFI8ActivePN64TQFP64INoReelCheck Availability
71342LA35JActivePL52PLCC52CNoTubeCheck Availability
71342LA35J8ActivePL52PLCC52CNoReelCheck Availability
71342LA35PFActivePN64TQFP64CNoTrayCheck Availability
71342LA35PF8ActivePN64TQFP64CNoReelCheck Availability
71342LA45JActivePL52PLCC52CNoTubeCheck Availability
71342LA45J8ActivePL52PLCC52CNoReelCheck Availability
71342LA55JActivePL52PLCC52CNoTubeCheck Availability
71342LA55J8ActivePL52PLCC52CNoReelCheck Availability
71342LA55PFActivePN64TQFP64CNoTrayCheck Availability
71342LA55PF8ActivePN64TQFP64CNoReelCheck Availability
71342LA70JActivePL52PLCC52CNoTubeCheck Availability
71342LA70J8ActivePL52PLCC52CNoReelCheck Availability
71342SA20JActivePL52PLCC52CNoTubeCheck Availability
71342SA20J8ActivePL52PLCC52CNoReelCheck Availability
71342SA20PFActivePN64TQFP64CNoTrayCheck Availability
71342SA20PF8ActivePN64TQFP64CNoReelCheck Availability
71342SA25JActivePL52PLCC52CNoTubeCheck Availability
71342SA25J8ActivePL52PLCC52CNoReelCheck Availability
71342SA25PFActivePN64TQFP64CNoTrayCheck Availability
71342SA25PF8ActivePN64TQFP64CNoReelCheck Availability
71342SA35JActivePL52PLCC52CNoTubeCheck Availability
71342SA35J8ActivePL52PLCC52CNoReelCheck Availability
71342SA35PFActivePN64TQFP64CNoTrayCheck Availability
71342SA35PF8ActivePN64TQFP64CNoReelCheck Availability
71342SA45JActivePL52PLCC52CNoTubeCheck Availability
71342SA45J8ActivePL52PLCC52CNoReelCheck Availability
71342SA55JActivePL52PLCC52CNoTubeCheck Availability
71342SA55J8ActivePL52PLCC52CNoReelCheck Availability
71342SA55PFActivePN64TQFP64CNoTrayCheck Availability
71342SA55PF8ActivePN64TQFP64CNoReelCheck Availability
71342SA70JActivePL52PLCC52CNoTubeCheck Availability
71342SA70J8ActivePL52PLCC52CNoReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
71342 Datasheet Datasheet PDF 312 KB Dec 17, 2012
Apps Notes & White Papers
AN-68, Dual-Port SRAM Simplifies PC-to-TMS320 Interface Application Note PDF 92 KB May 31, 2006
AN-91, The Most Commonly Asked Questions About Async Dual-Ports Application Note PDF 87 KB May 31, 2006
AN-09, Dual-Port SRAMs Yield Bit-Slice Designs Application Note PDF 69 KB May 30, 2006
show all (5)
AN-14, Dual-Port w/ Semaphore Arbitration Application Note PDF 71 KB May 30, 2006
AN-253, Introduction to Multi-Port Memories Application Note PDF 36 KB May 30, 2006
PCN# : A1606-02 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 567 KB Aug 26, 2016
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 (19)
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil Product Change Notice PDF 223 KB Oct 6, 2006
A-0603-04 Transfer TQFP and PQFP from ASAT HK to ASAT China Product Change Notice PDF 164 KB May 10, 2006
PCN#: TB-0512-01 Reel Color Changed from Blue to Black Product Change Notice PDF 729 KB Dec 16, 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#: A-0309-04, new mold compound G600 material Product Change Notice PDF 134 KB Oct 7, 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-0110-06 REV.1 Mold Compound Product Change Notice PDF 48 KB Apr 26, 2002
PCN# G-0203-05 Mold Compound Product Change Notice PDF 40 KB Apr 16, 2002
PCN SM-0202-02 Wafer Fab Transfer, Fab 2 to Fab4 Product Change Notice PDF 40 KB Feb 25, 2002
PCN# G-0110-06 Mold Compound Product Change Notice PDF 47 KB Dec 14, 2001
PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 11, 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
71342J PLCC HSpice Model Model - HSPICE application/x-tar 49 KB Oct 12, 1998