Part Number : 82C55A
Function : CHMOS PROGRAMMABLE PERIPHERAL INTERFACE
Package : 40-pin DIP and 44-pin type
Maker : Intel
Pinouts : 
Description :
The Intel 82C55A is a high-performance, CHMOS version of the industry standard 8255A general purpose programmable I/O device which is designed for use with all Intel and most other microprocessors. It provides 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation. The 82C55A is pin compatible with the NMOS 8255A and 8255A-5.
The device is available in 40-pin DIP and 44-pin plastic leaded chip carrier (PLCC) packages.
Block Diagram
Features :
1. Compatible with all Intel and Most Other Microprocessors
2. 24 Programmable I/O Pins
3. Low Power CHMOS
4. Completely TTL Compatible
5. Control Word Read-Back Capability
Datasheet PDF Download : 
Others datasheet of same file : 82C55
