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70T3319 - Block Diagram


256K x 18 Sync, 3.3V/2.5V Dual-Port RAM, Interleaved I/O's

The 70T3319 is a high-speed 256K x 18 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 70T3319 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
  • Dual chip enables allow for depth expansion without additional logic
  • Interrupt and Collision Detection 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
  • Available in a 256-pin BGA and 208-pin fpBGA packages
  • Includes JTAG functionality
  • 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
2.5184608BF208, BC256, BFG208Sync2.5 V LVTTL, 3.3 V LVTTL133.00, 166.00, 200.00-40 to 85°C, 0 to 70°CDual-Port256K x 18Collision Detect, Counters, Sleep Mode, JTAG, Interrupt, Dual ClocksFlowthrough, Pipelined

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
70T3319S133BCActiveBC256CABGA256CNoTrayCheck Availability
70T3319S133BC8ActiveBC256CABGA256CNoReelCheck Availability
70T3319S133BCINot Recommended
BC256CABGA256INoTrayCheck Availability
70T3319S133BCI8Not Recommended
BC256CABGA256INoReelCheck Availability
70T3319S133BFActiveBF208CABGA208CNoTrayCheck Availability
70T3319S133BF8ActiveBF208CABGA208CNoReelCheck Availability
70T3319S133BFGIActiveBFG208CABGA208IYesTrayCheck Availability
70T3319S133BFGI8ActiveBFG208CABGA208IYesReelCheck Availability
70T3319S133BFIActiveBF208CABGA208INoTrayCheck Availability
70T3319S133BFI8ActiveBF208CABGA208INoReelCheck Availability
70T3319S166BCActiveBC256CABGA256CNoTrayCheck Availability
70T3319S166BC8ActiveBC256CABGA256CNoReelCheck Availability
70T3319S166BFActiveBF208CABGA208CNoTrayCheck Availability
70T3319S166BF8ActiveBF208CABGA208CNoReelCheck Availability
70T3319S166BFGActiveBFG208CABGA208CYesTrayCheck Availability
70T3319S166BFG8ActiveBFG208CABGA208CYesReelCheck Availability
70T3319S200BCActiveBC256CABGA256CNoTrayCheck Availability
70T3319S200BC8ActiveBC256CABGA256CNoReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
70T3339/19/99 Data Sheet Datasheet PDF 822 KB Jun 17, 2015
Apps Notes & White Papers
AN-68, Dual-Port SRAM Simplifies PC-to-TMS320 Interface Application Note PDF 92 KB May 31, 2006
AN-254, The Most Commonly Asked Questions About Sync Dual-Ports Application Note PDF 66 KB May 30, 2006
AN-144, Sync Dual-Ports for DSP & Communication Applications Application Note PDF 102 KB May 30, 2006
show all (7)
AN-409 DP Memory Simplifies Wireless BaseStation Design Application Note PDF 284 KB May 30, 2006
AN-255 Dual-Port Power Discussion 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
AN-253, Introduction to Multi-Port Memories Application Note PDF 36 KB May 30, 2006
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
PDN# : F-08-01 PRODUCT DISCONTINUANCE NOTICE Product Delete Notice PDF 72 KB Aug 18, 2008
show all (12)
PCN# A-0607-05 Green Mold Compound KMC3580 for BGA Product Change Notice PDF 194 KB Aug 30, 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-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
PCN#:A-0305-02, new m/c G770 & 2300 d/a material Product Change Notice PDF 197 KB Jun 4, 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

Software & Tools

Title Type Format File Size Datesort icon
70T3319 BSDL Model Model - BSDL ZIP 5 KB Jun 24, 2004
70T3319 Verilog Model Model - Verilog ZIP 108 KB May 19, 2004
70T3319 IBIS Model Model - IBIS ZIP 16 KB May 28, 2004
locked Model - VHDL ZIP 34 KB Dec 13, 2004