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70261 - Block Diagram


16K x 16 Dual-Port RAM w/Int

The 70261 is a high-speed 16K x 16 Dual-Port Static RAM designed to be used as a stand-alone Dual-Port RAM or as a combination MASTER/SLAVE Dual-Port RAM for 32-bit-or-more word systems. 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
  • Separate upper-byte and lower-byte control for multiplexed bus compatibility
  • 70261 easily expands data bus width to 32 bits or more
  • Busy and Interrupt Flags
  • On-chip port arbitration logic
  • Full on-chip hardware support of semaphore signaling between ports
  • Fully asynchronous operation from either port
  • TTL-compatible, single 5V (±10%) power supply
  • Available in 100-pin TQFP package
  • Industrial temperature range (-40OC to +85OC) 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
516256PN100, PNG100Async5.0 V TTL15, 20, 25, 35, 55-40 to 85°C, 0 to 70°CDual-Port16K x 16Master, Semaphore, Slave, Interrupt, Busy

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
70261L15PFActivePN100TQFP100CNoTrayCheck Availability
70261L15PF8ActivePN100TQFP100CNoReelCheck Availability
70261L15PFGActivePNG100TQFP100CYesTrayCheck Availability
70261L15PFG8ActivePNG100TQFP100CYesReelCheck Availability
70261L20PFActivePN100TQFP100CNoTrayCheck Availability
70261L20PF8ActivePN100TQFP100CNoReelCheck Availability
70261L20PFGIActivePNG100TQFP100IYesTrayCheck Availability
70261L20PFGI8ActivePNG100TQFP100IYesReelCheck Availability
70261L20PFIActivePN100TQFP100INoTrayCheck Availability
70261L20PFI8ActivePN100TQFP100INoReelCheck Availability
70261L25PFActivePN100TQFP100CNoTrayCheck Availability
70261L25PF8ActivePN100TQFP100CNoReelCheck Availability
70261L35PFActivePN100TQFP100CNoTrayCheck Availability
70261L35PF8ActivePN100TQFP100CNoReelCheck Availability
70261L55PFActivePN100TQFP100CNoTrayCheck Availability
70261L55PF8ActivePN100TQFP100CNoReelCheck Availability
70261S15PFActivePN100TQFP100CNoTrayCheck Availability
70261S15PF8ActivePN100TQFP100CNoReelCheck Availability
70261S20PFActivePN100TQFP100CNoTrayCheck Availability
70261S20PF8ActivePN100TQFP100CNoReelCheck Availability
70261S25PFActivePN100TQFP100CNoTrayCheck Availability
70261S25PF8ActivePN100TQFP100CNoReelCheck Availability
70261S25PFIActivePN100TQFP100INoTrayCheck Availability
70261S25PFI8ActivePN100TQFP100INoReelCheck Availability
70261S35PFActivePN100TQFP100CNoTrayCheck Availability
70261S35PF8ActivePN100TQFP100CNoReelCheck Availability
70261S55PFActivePN100TQFP100CNoTrayCheck Availability
70261S55PF8ActivePN100TQFP100CNoReelCheck Availability
70261S55PFGActivePNG100TQFP100CYesTrayCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
70261 Data Sheet Datasheet PDF 697 KB Jun 15, 2015
Apps Notes & White Papers
AN-68, Dual-Port SRAM Simplifies PC-to-TMS320 Interface Application Note PDF 92 KB May 31, 2006
AN-59, Using 7024/7025 DP SRAMs to Match System Bus Widths Application Note PDF 89 KB May 31, 2006
AN-70, Dual-Port Interrupt Expansion Application Note PDF 56 KB May 31, 2006
show all (7)
AN-91, The Most Commonly Asked Questions About Async Dual-Ports Application Note PDF 87 KB May 31, 2006
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
AN-09, Dual-Port SRAMs Yield Bit-Slice Designs Application Note PDF 69 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
A-0603-04 Transfer TQFP and PQFP from ASAT HK to ASAT China Product Change Notice PDF 164 KB May 10, 2006
show all (15)
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-0303-01, new m/c G700 & 3230 d/a material Product Change Notice PDF 138 KB Mar 11, 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-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 SM 0008-04 - Die Revision Product Change Notice PDF 19 KB Aug 21, 2000
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
70261PF TQFP HSpice Model Model - HSPICE application/x-tar 49 KB Feb 18, 1999
70261PF TQFP IBIS Model Model - IBIS ZIP 13 KB Aug 1, 1997