UMC UM82C55A
The UM82C55A is a high performance CMOS version of the industry standard 8255A and is manufactured using a selfaligned silicon gate CMOS process. It is a general purpose programmable I/O device which may be used with many different microprocessors. The high performance of the UM82C55A make it compatible with microprocessors such as the 8086, 8048, 8051.| Part No. | UM82C55A |
|---|---|
| Datasheet | UM82C55A Download |
| Manufacturer |  UMC |
| Description | CMOS PROGRMMABLE PERIPHERAL INTERFACE |
| Buy | Stock & Price |
FEATURES
● Pin compatible with NMOS 8255A● 24 programmable I/O pins
● Fully TTL compatible
● Bus-hold circuitry on all I/O ports eliminates pull-up resistors
● High speed, no "wait state" operation with 8M Hz 80C86
● Direct bit set/reset capabi lity
● Enhanced control word read capabi lity
● Single 5V power supply
● 2.5mA drive capabi lity on all I/O port outputs
● Low standby power -ICCSB = 10llA
GENERAL DESCRIPTION
There are 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation. Static CMOS circuit design
