This file is the English manual for MM54C89/MM74C89 64-Bit TRI-STATE Random Access Read-Write Memory
This document describes the MM54C89/MM74C89, a 16-word by 4-bit random access read/write memory. The device features four address lines, four data input lines, a write enable line, and a memory enable line to select word locations and latch address information.
| Memory Size | 16-word by 4-bit |
|---|---|
| Operating Voltage Range | 3.0V to 15V |
| Operating Temperature (MM54C89) | -55°C to +125°C |
| Operating Temperature (MM74C89) | -40°C to +85°C |
| Power Dissipation (Dual-In-Line) | 700 mW |
| Access Time Typ. | 350 ns @ 5V, 130 ns @ 10V |
It is a 16-word by 4-bit random access read/write memory.
An internal address register latches the address information on the positive to negative transition of the memory enable input.
The output assumes a TRI-STATE (Hi-z) condition.