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概要

説明

The 70T659 is a high-speed 128K 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 systems 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) permits the on-chip circuitry of each port to enter a very low standby power mode.

特長

  • 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) or 2.5V (±100mV) power supply for I/Os and control signals on each port
  • Available in 256-ball BGA, 208-pin PQFP, and 208-ball fpBGA packages
  • Industrial temperature range (–40 °C to +85 °C) is available

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モデル

ECADモデル

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Diagram of ECAD Models