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70T653M - Block Diagram


512K x 36 Async, 3.3V/2.5V Dual-Port RAM, Interleaved I/O's

The 70T653M is a high-speed 256K x 36 Asynchronous Dual-Port Static RAM designed to be used as a stand-alone 18874K-bit Dual-Port RAM. An automatic power down feature controlled by the chip enables (either CE0 or CE1) permit the on-chip circuitry of each port to enter a very low standby power mode.


  • Dual-Port allows simultaneous access of the same memory location
  • RapidWrite Mode simplifies high-speed consecutive write cycles
  • Dual chip enables allow for depth expansion without external logic
  • Easily expands data bus width to 72 bits or more using the Busy Input when cascading more than one device
  • Busy input for port contention management
  • Interrupt Flags
  • Full on-chip hardware support of semaphore signaling between ports
  • Fully asynchronous operation from either port
  • Separate byte controls for multiplexed bus and bus matching compatibility
  • Sleep Mode Inputs on both ports
  • Single 2.5V (±100mV) power supply for core
  • LVTTL-compatible, selectable 3.3V (±150mV)/2.5V (±100mV) power supply for I/Os and control signals on each port
  • Includes JTAG functionality
  • Available in a 256-ball BGA
  • 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
2.53618432BC256, BCG256Async2.5 V LVTTL, 3.3 V LVTTL10, 12, 15-40 to 85°C, 0 to 70°CDual-Port512K x 36Interrupt

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
70T653MS10BCActiveBC256CABGA256CNoTrayCheck Availability
70T653MS10BC8ActiveBC256CABGA256CNoReelCheck Availability
70T653MS10BCGActiveBCG256CABGA256CYesTrayCheck Availability
70T653MS12BCActiveBC256CABGA256CNoTrayCheck Availability
70T653MS12BC8ActiveBC256CABGA256CNoReelCheck Availability
70T653MS12BCGIActiveBCG256CABGA256IYesTrayCheck Availability
70T653MS12BCIActiveBC256CABGA256INoTrayCheck Availability
70T653MS12BCI8ActiveBC256CABGA256INoReelCheck Availability
70T653MS15BCActiveBC256CABGA256CNoTrayCheck Availability
70T653MS15BC8ActiveBC256CABGA256CNoReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
70T653M Datasheet Datasheet PDF 705 KB Jun 25, 2015
Apps Notes & White Papers
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
AN-91, The Most Commonly Asked Questions About Async Dual-Ports Application Note PDF 87 KB May 31, 2006
show all (6)
AN-409 DP Memory Simplifies Wireless BaseStation Design Application Note PDF 284 KB May 30, 2006
AN-253, Introduction to Multi-Port Memories Application Note PDF 36 KB May 30, 2006
AN-14, Dual-Port w/ Semaphore Arbitration Application Note PDF 71 KB May 30, 2006
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 14, 2012
PCN# : A0705-02 New Mold Compound for CABGA-256, FPBGA-48, FPBGA-165 Product Change Notice PDF 138 KB Jul 25, 2007
PCN# A-0607-05 Green Mold Compound KMC3580 for BGA Product Change Notice PDF 194 KB Aug 30, 2006
show all (7)
PCN#: TB-0512-01 Reel Color Changed from Blue to Black Product Change Notice PDF 729 KB Dec 16, 2005
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products Product Change Notice PDF 80 KB Dec 14, 2004
PCN#: A-0403-03, BGA package family Product Change Notice PDF 38 KB Dec 9, 2004
PCN#: A-0310-01, Green Products Product Change Notice PDF 26 KB Oct 10, 2003

Software & Tools

Title Type Format File Size Datesort icon
70T653M BC BSDL Model Model - BSDL ZIP 6 KB May 16, 2005
IDT653M IBIS Model Model - IBIS ZIP 18 KB Feb 24, 2004