GENERAL  DESCRIPTION

The MSM82C55A-2 is a programmable universal I/O interface device which operates as high speed and on low power consumption due to 3m silicon gate CMOS technology.  It is the best fit as an I/O port in a system which employs the 8-bit parallel processing MSM80C85AH CPU. This device has 24-bit I/O pins equivalent to three 8-bit I/O ports and all inputs/outputs are TTL interface compatible.

FEATURES

• High speed and low power consumption due to 3m silicon gate CMOS technology

• 3 V to 6 V single power supply

• Full static operation

• Programmable 24-bit I/O ports

• Bidirectional bus operation (Port A)

• Bit set/reset function (Port C)

• TTL compatible

• Compatible with 8255A-5

• 40-pin Plastic DIP (DIP40-P-600-2.54): (Product name: MSM82C55A-2RS)

• 44-pin Plastic QFJ (QFJ44-P-S650-1.27): (Product name: MSM82C55A-2VJS)

• 44-pin Plastic QFP (QFP44-P-910-0.80-2K): (Product name: MSM82C55A-2GS-2K)