2K x 8 Dual-Port RAM w/Int

The 71421 is a high-speed 2K x 8 Dual-Port Static RAM with internal interrupt logic for interprocessor communications. It is designed to be used as a "SLAVE" Dual-Port RAM together with the 71321 "MASTER" Dual-Port in 16-bit-or-more word width systems which would result in full-speed, error free operation without the need for additional discrete logic. An automatic power down feature, controlled by CE, permits the on chip circuitry of each port to enter a very low standby power mode.

Features

  • True Dual-Ported memory cells which allow simultaneous access of the same memory location
  • Two INT flags for port-to-port communications
  • BUSY input
  • Fully asynchronous operation from either port
  • Battery backup operation – 2V data retention (LA only)
  • TTL-compatible, single 5V ±10% power supply
  • Available in 52-Pin PLCC, 64-Pin TQFP and STQFP packages
  • Industrial temperature range (–40C to +85C) is available

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
71421LA20J Active PL52 PLCC 52 C No Tube Availability
71421LA20J8 Active PL52 PLCC 52 C No Reel Availability
71421LA20JG Active PLG52 PLCC 52 C Yes Tube Availability
71421LA20JG8 Active PLG52 PLCC 52 C Yes Reel Availability
71421LA20PF Active PN64 TQFP 64 C No Tray Availability
71421LA20PF8 Active PN64 TQFP 64 C No Reel Availability
71421LA20PFG Active PNG64 TQFP 64 C Yes Tray Availability
71421LA20PFG8 Active PNG64 TQFP 64 C Yes Reel Availability
71421LA25J Active PL52 PLCC 52 C No Tube Availability
71421LA25J8 Active PL52 PLCC 52 C No Reel Availability
71421LA25JI Active PL52 PLCC 52 I No Tube Availability
71421LA25JI8 Active PL52 PLCC 52 I No Reel Availability
71421LA25PF Active PN64 TQFP 64 C No Tray Availability
71421LA25PF8 Active PN64 TQFP 64 C No Reel Availability
71421LA25PFGI Active PNG64 TQFP 64 I Yes Tray Availability
71421LA25PFGI8 Active PNG64 TQFP 64 I Yes Reel Availability
71421LA25PFI Active PN64 TQFP 64 I No Tray Availability
71421LA25PFI8 Active PN64 TQFP 64 I No Reel Availability
71421LA35J Active PL52 PLCC 52 C No Tube Availability
71421LA35J8 Active PL52 PLCC 52 C No Reel Availability
71421LA35PF Active PN64 TQFP 64 C No Tray Availability
71421LA35PF8 Active PN64 TQFP 64 C No Reel Availability
71421LA55J Active PL52 PLCC 52 C No Tube Availability
71421LA55J8 Active PL52 PLCC 52 C No Reel Availability
71421LA55PF Active PN64 TQFP 64 C No Tray Availability
71421LA55PF8 Active PN64 TQFP 64 C No Reel Availability
71421SA20J Active PL52 PLCC 52 C No Tube Availability
71421SA20J8 Active PL52 PLCC 52 C No Reel Availability
71421SA20PF Active PN64 TQFP 64 C No Tray Availability
71421SA20PF8 Active PN64 TQFP 64 C No Reel Availability
71421SA25J Active PL52 PLCC 52 C No Tube Availability
71421SA25J8 Active PL52 PLCC 52 C No Reel Availability
71421SA25PF Active PN64 TQFP 64 C No Tray Availability
71421SA25PF8 Active PN64 TQFP 64 C No Reel Availability
71421SA35J Active PL52 PLCC 52 C No Tube Availability
71421SA35J8 Active PL52 PLCC 52 C No Reel Availability
71421SA35PF Active PN64 TQFP 64 C No Tray Availability
71421SA35PF8 Active PN64 TQFP 64 C No Reel Availability
71421SA55J Active PL52 PLCC 52 C No Tube Availability
71421SA55J8 Active PL52 PLCC 52 C No Reel Availability
71421SA55JI Active PL52 PLCC 52 I No Tube Availability
71421SA55JI8 Active PL52 PLCC 52 I No Reel Availability
71421SA55PF Active PN64 TQFP 64 C No Tray Availability
71421SA55PF8 Active PN64 TQFP 64 C No Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
71321/421 Datasheet - Datasheet PDF 141 KB Oct 28, 2008
Apps Notes & White Papers
AN-91, The Most Commonly Asked Questions About Async Dual-Ports - Application Note PDF 87 KB May 30, 2006
AN-70, Dual-Port Interrupt Expansion - Application Note PDF 56 KB May 30, 2006
AN-68, Dual-Port SRAM Simplifies PC-to-TMS320 Interface - Application Note PDF 92 KB May 30, 2006
AN-09, Dual-Port SRAMs Yield Bit-Slice Designs - Application Note PDF 69 KB May 29, 2006
AN-253, Introduction to Multi-Port Memories - Application Note PDF 36 KB May 29, 2006
PCNs & PDNs
PCN# : A1606-02 Add Greatek Taiwan as Alternate Assembly - Product Change Notice PDF 567 KB Aug 25, 2016
PCN#: A1309-03 Additional Assembly Sources - Product Change Notice PDF 398 KB Oct 20, 2013
PCN# G-0110-06 Mold Compound - Product Change Notice PDF 47 KB Dec 13, 2001
PCN# : A-0610-02 ASAT China as Alternate Facility for CABGA/CVBGA/FPBGA/TQFP/PQFP - Product Change Notice PDF 252 KB Oct 18, 2006
PCN# G-0203-05 Mold Compound - Product Change Notice PDF 40 KB Apr 15, 2002
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil - Product Change Notice PDF 223 KB Oct 5, 2006
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products - Product Change Notice PDF 80 KB Dec 13, 2004
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w - Product Change Notice PDF 24 KB Nov 13, 2012
A-0603-04 Transfer TQFP and PQFP from ASAT HK to ASAT China - Product Change Notice PDF 164 KB May 9, 2006
PCN# G0106-01, Moisture Sensitive Label Change - Product Change Notice PDF 274 KB Jun 10, 2001
PCN#: A-0310-01, Green Products - Product Change Notice PDF 26 KB Oct 9, 2003
PCN#: G-0302-06, New die attach 3230 from Ablestik - Product Change Notice PDF 150 KB Mar 19, 2003
PCN#G-0302-05, New mold compound EME-G700 series - Product Change Notice PDF 65 KB Mar 19, 2003
PCN# G9911-05, To qualify low alpha mold compound. - Product Change Notice PDF 44 KB Nov 17, 1999
PCN A-0506-03; Packing Material Change - Product Change Notice PDF 290 KB Jul 18, 2005
PCN#: TB-0512-01 Reel Color Changed from Blue to Black - Product Change Notice PDF 729 KB Dec 15, 2005
PCN# G-0110-06 REV.1 Mold Compound - Product Change Notice PDF 48 KB Apr 25, 2002
PCN# G-0206-08, Orientation of square PQFP & TQFP - Product Change Notice PDF 150 KB Jun 16, 2002
PCN SM-0202-02 Wafer Fab Transfer, Fab 2 to Fab4 - Product Change Notice PDF 40 KB Feb 24, 2002
PCN#: A-0309-04, new mold compound G600 material - Product Change Notice PDF 134 KB Oct 6, 2003

Software & Tools

Title Other Languages Type Format File Size Date
71421PF TQFP IBIS Model - Model - IBIS ZIP 11 KB May 16, 2011
7142PF TQFP IBIS Model - Model - IBIS ZIP 11 KB Nov 6, 1997
71421J PLCC IBIS Model - Model - IBIS ZIP 12 KB Jun 30, 1997
71421J PLCC HSpice Model - Model - HSPICE Z 19 KB Oct 11, 1998
71421 VHDL Model - Model - VHDL ZIP 9 KB Feb 17, 2005