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
