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81C55 Datasheet 2048-Bit CMOS STATIC RAM

Manufacturer: OKI Electric

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General Description

The MSM81C55-5 has a 2k-bit static RAM (256 bytes) with parallel I/O ports and a timer.

It uses silicon gate CMOS technology and consumes a standby current of 100 micro ampere, maximum, while the chip is not selected.

Featureing a maximum access time of 400 ns, the MSM81C55-5 can be used in an MSM80C85AH system without using wait states.

Overview

E2O0014-27-X2 ¡ Semiconductor MSM81C55-5RS/GS/JS ¡ Semiconductor 2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER This version: Jan.

1998 MSM81C55-5RS/GS/JS Previous version: Aug.

Key Features

  • High speed and low power achieved with silicon gate CMOS technology.
  • 256 words x 8bits RAM.
  • Single power supply, 3 to 6 V.
  • Completely static operation.
  • On-chip address latch.
  • 8-bit programmable I/O ports (port A and B).
  • TTL Compatible.
  • RAM data hold characteristic at 2 V.
  • 6-bit programmable I/O port (port C).
  • 14-bit programmable binary counter/timer.
  • Multiplexed address/data bus.
  • Direct i.

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