81C55 - 2048-Bit CMOS STATIC RAM

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.

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.

OKI electronic componets

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Datasheet Details

Part number	81C55
Manufacturer	OKI electronic componets
File Size	156.91 KB
Description	2048-Bit CMOS STATIC RAM
Datasheet	81C55 Datasheet
Additional preview pages of the 81C55 datasheet.

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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. 1996 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. The parallel I/O consists of two 8-bit ports and one 6-bit port (both general purpose). The MSM81C55-5 also contains a 14-bit programmable counter/timer which may be used for sequence-wave generation or terminal count-pulsing.

Published: Mar 22, 2005 |