UM82C55A Datasheet (UMC) - CMOS PROGRMMABLE PERIPHERAL INTERFACE

UM82C55A, CMOS PROGRMMABLE PERIPHERAL INTERFACE

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.

There are 24 I/O pins which may be individually pro

UM82C55A 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