81C55 Overview
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.
81C55 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
- pletely static operation
- On-chip address latch
- 8-bit programmable I/O ports (port A and B)
- TTL patible
- RAM data hold characteristic at 2 V
- 6-bit programmable I/O port (port C)
- 14-bit programmable binary counter/timer
