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

The 70T631 is a high-speed 256K x 18 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 36-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 36 bits or more using the Master/Slave select when cascading more than one device
  • Busy and Interrupt Flags
  • On-chip port arbitration logic
  • Full hardware support of semaphore signaling between ports on-chip
  • 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 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
70T631S10BCI Active BC256 CABGA 256 I No Tray Availability
70T631S10BCI8 Active BC256 CABGA 256 I No Reel Availability
70T631S10BF Active BF208 CABGA 208 C No Tray Availability
70T631S10BF8 Active BF208 CABGA 208 C No Reel Availability
70T631S12BCI Active BC256 CABGA 256 I No Tray Availability
70T631S12BCI8 Active BC256 CABGA 256 I No Reel Availability
70T631S12BF Active BF208 CABGA 208 C No Tray Availability
70T631S12BF8 Active BF208 CABGA 208 C No Reel Availability
70T631S15BF Active BF208 CABGA 208 C No Tray Availability
70T631S15BF8 Active BF208 CABGA 208 C No Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
70T633-70T631 Datasheet Datasheet PDF 437 KB Jun 17, 2012
Application Notes & White Papers
AN-409 DP Memory Simplifies Wireless BaseStation Design Application Note PDF 291 KB May 29, 2006
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-91, The Most Commonly Asked Questions About Async Dual-Ports Application Note PDF 87 KB May 30, 2006
AN-70, Dual-Port Interrupt Expansion Application Note PDF 56 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# : FS-11-01 PRODUCT DISCONTINUANCE NOTICE ON DUAL PORT AND FIFO PRODUCTS Product Delete Notice PDF 70 KB Jan 17, 2011
PDN# : F-08-01 PRODUCT DISCONTINUANCE NOTICE Product Delete Notice PDF 72 KB Aug 17, 2008
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

Software & Tools

Title Other Languages Type Format File Size Date
70T631 VHDL Model Model - VHDL TXT 15 KB May 19, 2004
IDT70T631 BSDL Model Model - BSDL ZIP 5 KB Feb 23, 2004
70T631 Verilog Model Model - Verilog TXT 55 KB May 19, 2004
IDT70T631 IBIS Model Model - IBIS ZIP 52 KB Feb 23, 2004