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70V658 - Block Diagram


64K x 36 3.3V Dual-Port RAM, Interleaved I/O's

The 70V658 is a high-speed 64K x 36 Asynchronous 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 72-bit-or-more word system. Using the IDT MASTER/SLAVE Dual-Port RAM approach in 72-bit or wider memory system applications results in full-speed, error-free operation without the need for additional discrete logic. 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
  • Dual chip enables allow for depth expansion without external logic
  • Easily expands data bus width to 72 bits or more using the Master/Slave select when cascading more than one device
  • 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
  • Separate byte controls for multiplexed bus and bus matching compatibility
  • Includes JTAG functionality on BGA package versions only
  • LVTTL-compatible, single 3.3V (±150mV) power supply for core
  • LVTTL-compatible, selectable 3.3V (±150mV)/2.5V (±100mV) power supply for I/Os and control signals on each port
  • Available in a 208-pin PQFP, 208-ball fpBGA and 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
3.3362304BF208, BFG208, DR208, BC256, BCG256, DRG208Async3.3 V LVTTL10, 12, 15-40 to 85°C, 0 to 70°CDual-Port64K x 36JTAG, Master, Semaphore, Interrupt, Busy, Slave

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
70V658S10BCActiveBC256CABGA256CNoTrayCheck Availability
70V658S10BC8ActiveBC256CABGA256CNoReelCheck Availability
70V658S10BCGActiveBCG256CABGA256CYesTrayCheck Availability
70V658S10BFActiveBF208CABGA208CNoTrayCheck Availability
70V658S10BF8ActiveBF208CABGA208CNoReelCheck Availability
70V658S10BFGActiveBFG208CABGA208CYesTrayCheck Availability
70V658S10BFG8ActiveBFG208CABGA208CYesReelCheck Availability
70V658S10DRActiveDR208PQFP208CNoTrayCheck Availability
70V658S10DRGActiveDRG208PQFP208CYesTrayCheck Availability
70V658S12BCActiveBC256CABGA256CNoTrayCheck Availability
70V658S12BC8ActiveBC256CABGA256CNoReelCheck Availability
70V658S12BCIActiveBC256CABGA256INoTrayCheck Availability
70V658S12BCI8ActiveBC256CABGA256INoReelCheck Availability
70V658S12BFActiveBF208CABGA208CNoTrayCheck Availability
70V658S12BF8ActiveBF208CABGA208CNoReelCheck Availability
70V658S12BFGIActiveBFG208CABGA208IYesTrayCheck Availability
70V658S12BFGI8ActiveBFG208CABGA208IYesReelCheck Availability
70V658S12BFIActiveBF208CABGA208INoTrayCheck Availability
70V658S12BFI8ActiveBF208CABGA208INoReelCheck Availability
70V658S12DRActiveDR208PQFP208CNoTrayCheck Availability
70V658S12DRIActiveDR208PQFP208INoTrayCheck Availability
70V658S15BCActiveBC256CABGA256CNoTrayCheck Availability
70V658S15BC8ActiveBC256CABGA256CNoReelCheck Availability
70V658S15BFActiveBF208CABGA208CNoTrayCheck Availability
70V658S15BF8ActiveBF208CABGA208CNoReelCheck Availability
70V658S15DRActiveDR208PQFP208CNoTrayCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
70V659/58/57 Datasheet Datasheet PDF 199 KB Oct 23, 2008
Apps Notes & White Papers
AN-91, The Most Commonly Asked Questions About Async Dual-Ports Application Note PDF 87 KB May 31, 2006
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 14, 2012
PCN# A-0506-01: New m/c G700 & d/a 8361J for PQFP Product Change Notice PDF 16 KB Aug 12, 2005
PCN A-0506-03; Packing Material Change Product Change Notice PDF 290 KB Jul 19, 2005
show all (7)
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# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 11, 2001
PCN# G9911-05, To qualify low alpha mold compound. Product Change Notice PDF 44 KB Nov 18, 1999