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70T3509M - Block Diagram


1024K x 36 Sync, 3.3V/2.5V Dual-Port RAM

The 70T3509M is a high-speed 1024K x 36 bit synchronous Dual-Port RAM that has been optimized for applications having unidirectional or bidirectional data flow in bursts. An automatic power down feature, controlled by CE0 and CE1, permits the on-chip circuitry of each port to enter a very low standby power mode. The 70T3509M can support an operating voltage of either 3.3V or 2.5V on one or both ports, controllable by the OPT pins. The power supply for the core of the device (VDD) is at 2.5V.


  • Dual-Port allows simultaneous access of the same memory location
  • Selectable Pipelined or Flow-Through output mode
  • Counter enable and repeat features
  • Interrupt Flags
  • Full synchronous operation on both ports
  • Separate byte controls for multiplexed bus and bus matching compatibility
  • Dual Cycle Deselect (DCD) for Pipelined Output Mode
  • 2.5V (±100mV) power supply for core
  • LVTTL compatible, selectable 3.3V (±150mV) or 2.5V (±100mV) power supply for I/Os and control signals on each port
  • Includes JTAG functionality
  • Available in a 256-pin BGA
  • Common BGA footprint provides design flexibility over seven density generations (512K to 36M-bit)
  • Industrial temperature range (-40C to +85C) is available

Product Specification

Core Voltage (V)Bus Width (bits)Density (Kb)Pkg. CodeInterfaceI/O TypeCycle Time (ns)I/O Frequency (MHz)Temp. RangeArchitectureOrganizationFunctionOutput Type
2.53636864BP256, BPG256Sync2.5 V LVTTL, 3.3 V LVTTL133.00-40 to 85°C, 0 to 70°CDual-Port1024K x 36Sleep Mode, InterruptPipelined, Flowthrough

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
70T3509MS133BPActiveBP256CABGA256CNoTrayCheck Availability
70T3509MS133BPGActiveBPG256CABGA256CYesTrayCheck Availability
70T3509MS133BPGIActiveBPG256CABGA256IYesTrayCheck Availability
70T3509MS133BPIActiveBP256CABGA256INoTrayCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
70T3509M Datasheet Datasheet PDF 206 KB Jul 17, 2014
Apps Notes & White Papers
AN-411 JTAG Testing of Multichip Modules Application Note PDF 105 KB Jun 1, 2006
AN-411 JTAG Testing of Multichip Modules Application Note PDF 105 KB Jun 1, 2006
AN-68, Dual-Port SRAM Simplifies PC-to-TMS320 Interface Application Note PDF 92 KB May 31, 2006
show all (9)
AN-144, Sync Dual-Ports for DSP & Communication Applications Application Note PDF 102 KB May 30, 2006
AN-254, The Most Commonly Asked Questions About Sync Dual-Ports Application Note PDF 66 KB May 30, 2006
AN-253, Introduction to Multi-Port Memories Application Note PDF 36 KB May 30, 2006
AN-255 Dual-Port Power Discussion Application Note PDF 36 KB May 30, 2006
AN-409 DP Memory Simplifies Wireless BaseStation Design Application Note PDF 284 KB May 30, 2006
AN-09, Dual-Port SRAMs Yield Bit-Slice Designs Application Note PDF 69 KB May 30, 2006
PCN#: TB-0512-01 Reel Color Changed from Blue to Black Product Change Notice PDF 729 KB Dec 16, 2005

Software & Tools

Title Type Format File Size Datesort icon
70T3509M BP BSDL Model Model - BSDL ZIP 14 KB Aug 23, 2005
70T3509M IBIS Model Model - IBIS ZIP 18 KB Aug 17, 2005
Idt70t3509m-022307.tar Model - VHDL application/x-gzip 652 KB Jul 17, 2007