256K x 36 Async, 3.3V/2.5V Dual-Port RAM, Interleaved I/O's

The 70T651 is a high-speed 256K 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 which would result 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.

Features

  • 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 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
  • Sleep Mode Inputs on both ports
  • Includes JTAG functionality
  • 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
  • Available in a 256-ball BGA, 208-pin PQFP and 208-ball fpBGA.
  • Industrial temperature range (–40C to +85C) is available

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
70T651S10BC Active BC256 CABGA 256 C No Tray Availability
70T651S10BC8 Active BC256 CABGA 256 C No Reel Availability
70T651S10BCI Active BC256 CABGA 256 I No Tray Availability
70T651S10BCI8 Active BC256 CABGA 256 I No Reel Availability
70T651S10BF Active BF208 CABGA 208 C No Tray Availability
70T651S10BF8 Active BF208 CABGA 208 C No Reel Availability
70T651S10BFG Active BFG208 CABGA 208 C Yes Tray Availability
70T651S10BFG8 Active BFG208 CABGA 208 C Yes Reel Availability
70T651S10BFGI Active BFG208 CABGA 208 I Yes Tray Availability
70T651S10BFGI8 Active BFG208 CABGA 208 I Yes Reel Availability
70T651S10BFI Active BF208 CABGA 208 I No Tray Availability
70T651S10BFI8 Active BF208 CABGA 208 I No Reel Availability
70T651S10DR Last Time Buy DR208 PQFP 208 C No Tray Availability
70T651S12BC Active BC256 CABGA 256 C No Tray Availability
70T651S12BC8 Active BC256 CABGA 256 C No Reel Availability
70T651S12BCI Active BC256 CABGA 256 I No Tray Availability
70T651S12BCI8 Active BC256 CABGA 256 I No Reel Availability
70T651S12BF Active BF208 CABGA 208 C No Tray Availability
70T651S12BF8 Active BF208 CABGA 208 C No Reel Availability
70T651S12BFGI Active BFG208 CABGA 208 I Yes Tray Availability
70T651S12BFGI8 Active BFG208 CABGA 208 I Yes Reel Availability
70T651S12BFI Active BF208 CABGA 208 I No Tray Availability
70T651S12BFI8 Active BF208 CABGA 208 I No Reel Availability
70T651S12DR Last Time Buy DR208 PQFP 208 C No Tray Availability
70T651S12DRI Last Time Buy DR208 PQFP 208 I No Tray Availability
70T651S15BC Active BC256 CABGA 256 C No Tray Availability
70T651S15BC8 Active BC256 CABGA 256 C No Reel Availability
70T651S15BF Active BF208 CABGA 208 C No Tray Availability
70T651S15BF8 Active BF208 CABGA 208 C No Reel Availability
70T651S15DR Last Time Buy DR208 PQFP 208 C No Tray Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
70T651/9 Data Sheet Datasheet PDF 739 KB Jul 22, 2015
Application Notes & White Papers
AN-409 DP Memory Simplifies Wireless BaseStation Design Application Note PDF 284 KB May 29, 2006
AN-14, Dual-Port w/ Semaphore Arbitration Application Note PDF 71 KB May 29, 2006
AN-70, Dual-Port Interrupt Expansion Application Note PDF 56 KB May 30, 2006
AN-91, The Most Commonly Asked Questions About Async Dual-Ports Application Note PDF 87 KB May 30, 2006
AN-253, Introduction to Multi-Port Memories Application Note PDF 36 KB May 29, 2006
AN-59, Using 7024/7025 DP SRAMs to Match System Bus Widths Application Note PDF 89 KB May 30, 2006
PCNs & PDNs
PDN# : SP-17-02 PRODUCT DISCONTINUANCE NOTICE FOR SPO DEVICES Product Discontinuation Notice PDF 645 KB Sep 14, 2017
PCN#: A1309-03 Additional Assembly Sources Product Change Notice PDF 398 KB Oct 20, 2013
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products Product Change Notice PDF 80 KB Dec 13, 2004
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 13, 2012
PCN#: A-0310-01, Green Products Product Change Notice PDF 26 KB Oct 9, 2003
PCN#: A-0403-03, BGA package family Product Change Notice PDF 38 KB Dec 8, 2004
PCN# A-0607-05 Green Mold Compound KMC3580 for BGA Product Change Notice PDF 194 KB Aug 29, 2006
PCN A-0506-03; Packing Material Change Product Change Notice PDF 290 KB Jul 18, 2005
PCN#:A-0305-02, new m/c G770 & 2300 d/a material Product Change Notice PDF 197 KB Jun 3, 2003
PCN#: TB-0512-01 Reel Color Changed from Blue to Black Product Change Notice PDF 729 KB Dec 15, 2005
PCN# A-0506-01: New m/c G700 & d/a 8361J for PQFP Product Change Notice PDF 16 KB Aug 11, 2005

Software & Tools

Title Other Languages Type Format File Size Date
70T651Verilog Model Model - Verilog TXT 67 KB May 19, 2004
IDT70T651 BSDL Model Model - BSDL ZIP 9 KB Feb 23, 2004
IDT70T651 IBIS Model Model - IBIS ZIP 54 KB Feb 23, 2004