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71V321 - Block Diagram


2K x 8 3.3V Dual-Port RAM

The 71V321 is a high-speed 2K x 8 Dual-Port Static RAMs with internal interrupt logic for interprocessor communications. The device provides two independent ports with separate control, address, and I/O pins that permit independent, asynchronous access for reads or writes to any location in memory. An automatic power down feature, controlled by CE, permits the on chip circuitry of each port to enter a very low standby power mode.


  • True Dual-Ported memory cells which allow simultaneous access of the same memory location
  • Two INT flags for port-to-port communications
  • On-chip port arbitration logic
  • BUSY output flag
  • Fully asynchronous operation from either port
  • Battery backup operation—2V data retention (L only)
  • TTL-compatible, single 3.3V power supply
  • Available in 52-pin PLCC, 64-pin TQFP and STQFP 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
3.3816PL52, PP64, PN64, PPG64, PNG64, PLG52Async3.3 V LVTTL25, 35, 55-40 to 85°C, 0 to 70°CDual-Port2K x 8Busy, Interrupt, Master

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
71V321L25JActivePL52PLCC52CNoTubeCheck Availability
71V321L25J8ActivePL52PLCC52CNoReelCheck Availability
71V321L25JGActivePLG52PLCC52CYesTubeCheck Availability
71V321L25JG8ActivePLG52PLCC52CYesReelCheck Availability
71V321L25JIActivePL52PLCC52INoTubeCheck Availability
71V321L25JI8ActivePL52PLCC52INoReelCheck Availability
71V321L25PFActivePN64TQFP64CNoTrayCheck Availability
71V321L25PF8ActivePN64TQFP64CNoReelCheck Availability
71V321L25PFGActivePNG64TQFP64CYesTrayCheck Availability
71V321L25PFG8ActivePNG64TQFP64CYesReelCheck Availability
71V321L25PFGIActivePNG64TQFP64IYesTrayCheck Availability
71V321L25PFGI8ActivePNG64TQFP64IYesReelCheck Availability
71V321L25PFIActivePN64TQFP64INoTrayCheck Availability
71V321L25PFI8ActivePN64TQFP64INoReelCheck Availability
71V321L25TFActivePP64TQFP64CNoTrayCheck Availability
71V321L25TF8ActivePP64TQFP64CNoReelCheck Availability
71V321L25TFGActivePPG64TQFP64CYesTrayCheck Availability
71V321L25TFGIActivePPG64TQFP64IYesTrayCheck Availability
71V321L25TFIActivePP64TQFP64INoTrayCheck Availability
71V321L25TFI8ActivePP64TQFP64INoReelCheck Availability
71V321L35JActivePL52PLCC52CNoTubeCheck Availability
71V321L35J8ActivePL52PLCC52CNoReelCheck Availability
71V321L35JGActivePLG52PLCC52CYesTubeCheck Availability
71V321L35JG8ActivePLG52PLCC52CYesReelCheck Availability
71V321L35JGIActivePLG52PLCC52IYesTubeCheck Availability
71V321L35JGI8ActivePLG52PLCC52IYesReelCheck Availability
71V321L35PFActivePN64TQFP64CNoTrayCheck Availability
71V321L35PF8ActivePN64TQFP64CNoReelCheck Availability
71V321L35PFGIActivePNG64TQFP64IYesTrayCheck Availability
71V321L35PFGI8ActivePNG64TQFP64IYesReelCheck Availability
71V321L35TFActivePP64TQFP64CNoTrayCheck Availability
71V321L35TF8ActivePP64TQFP64CNoReelCheck Availability
71V321L55JActivePL52PLCC52CNoTubeCheck Availability
71V321L55J8ActivePL52PLCC52CNoReelCheck Availability
71V321L55PFActivePN64TQFP64CNoTrayCheck Availability
71V321L55PF8ActivePN64TQFP64CNoReelCheck Availability
71V321L55TFActivePP64TQFP64CNoTrayCheck Availability
71V321L55TF8ActivePP64TQFP64CNoReelCheck Availability
71V321S25JActivePL52PLCC52CNoTubeCheck Availability
71V321S25J8ActivePL52PLCC52CNoReelCheck Availability
71V321S25PFActivePN64TQFP64CNoTrayCheck Availability
71V321S25PF8ActivePN64TQFP64CNoReelCheck Availability
71V321S25TFActivePP64TQFP64CNoTrayCheck Availability
71V321S25TF8ActivePP64TQFP64CNoReelCheck Availability
71V321S35JActivePL52PLCC52CNoTubeCheck Availability
71V321S35J8ActivePL52PLCC52CNoReelCheck Availability
71V321S35PFActivePN64TQFP64CNoTrayCheck Availability
71V321S35PF8ActivePN64TQFP64CNoReelCheck Availability
71V321S35TFActivePP64TQFP64CNoTrayCheck Availability
71V321S35TF8ActivePP64TQFP64CNoReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
71V321 Datasheet Datasheet PDF 124 KB Oct 13, 2015
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-70, Dual-Port Interrupt Expansion Application Note PDF 56 KB May 31, 2006
show all (6)
AN-14, Dual-Port w/ Semaphore Arbitration Application Note PDF 71 KB May 30, 2006
AN-09, Dual-Port SRAMs Yield Bit-Slice Designs Application Note PDF 69 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# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 14, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 15, 2016
show all (24)
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 22, 2015
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 21, 2015
PCN#: A1309-03 Additional Assembly Sources Product Change Notice PDF 398 KB Oct 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
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-0302-05, 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-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
71V321PF TQFP IBIS Model Model - IBIS ZIP 12 KB Jul 1, 1997