Memory & Logic

Overview

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.

70T631 - Block Diagram
70T631 - Block Diagram
  • 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

Documentation

Title Type Date
70T633-70T631 Datasheet
PDF425 KB
Datasheet
AN-70, Dual-Port Interrupt Expansion
PDF129 KB
Application Note
AN-91, The Most Commonly Asked Questions About Async Dual-Ports
PDF197 KB
Application Note
AN-59, Using 7024/7025 DP SRAMs to Match System Bus Widths
PDF182 KB
Application Note
AN-14, Dual-Port w/ Semaphore Arbitration
PDF183 KB
Application Note
AN-253, Introduction to Multi-Port Memories
PDF97 KB
Application Note
AN-409 DP Memory Simplifies Wireless BaseStation Design
PDF284 KB
Application Note
PDN# : FS-11-01 PRODUCT DISCONTINUANCE NOTICE ON DUAL PORT AND FIFO PRODUCTS
PDF70 KB
End Of Life Notice
PDN# : F-08-01 PRODUCT DISCONTINUANCE NOTICE
PDF70 KB
End Of Life Notice
Cypress Discontinued Dual-port and FIFO to IDT Cross Reference Guide
PDF123 KB
Guide
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w
PDF24 KB
Product Change Notice
PCN# A-0607-05 Green Mold Compound KMC3580 for BGA
PDF194 KB
Product Change Notice
PCN#: TB-0512-01 Reel Color Changed from Blue to Black
PDF729 KB
Product Change Notice
PCN A-0506-03; Packing Material Change
PDF290 KB
Product Change Notice
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products
PDF80 KB
Product Change Notice
PCN#: A-0403-03, BGA package family
PDF38 KB
Product Change Notice
PCN#: A-0310-01, Green Products
PDF26 KB
Product Change Notice
PCN#:A-0305-02, new m/c G770 & 2300 d/a material
PDF197 KB
Product Change Notice

Design & Development

Software Downloads

Title Type Date
PDN# : FS-11-01 PRODUCT DISCONTINUANCE NOTICE ON DUAL PORT AND FIFO PRODUCTS
PDF70 KB
End Of Life Notice
PDN# : F-08-01 PRODUCT DISCONTINUANCE NOTICE
PDF70 KB
End Of Life Notice

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models

Models

Title Type Date
IDT70T631 BSDL Model
ZIP5 KB
Model - BSDL
IDT70T631 IBIS Model
ZIP52 KB
Model - IBIS
70T631 VHDL Model
TXT15 KB
Model - VHDL
70T631 Verilog Model
TXT55 KB
Model - Verilog

Product Options

    Processing table
    Part Number
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    70T631S10BCI
    play_circleActive
    memory
    view_in_ar
    		CABGA 256 I No Tray
    70T631S10BCI8
    play_circleActive
    memory
    view_in_ar
    		CABGA 256 I No Reel
    70T631S10BF
    play_circleActive
    memory
    view_in_ar
    		CABGA 208 C No Tray
    70T631S10BF8
    play_circleActive
    memory
    view_in_ar
    		CABGA 208 C No Reel
    70T631S12BCI
    play_circleActive
    memory
    view_in_ar
    		CABGA 256 I No Tray
    70T631S12BCI8
    play_circleActive
    memory
    view_in_ar
    		CABGA 256 I No Reel
    70T631S12BF
    play_circleActive
    memory
    view_in_ar
    		CABGA 208 C No Tray
    70T631S12BF8
    play_circleActive
    memory
    view_in_ar
    		CABGA 208 C No Reel
    70T631S15BF
    play_circleActive
    memory
    view_in_ar
    		CABGA 208 C No Tray
    70T631S15BF8
    play_circleActive
    memory
    view_in_ar
    		CABGA 208 C No Reel
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product