Product Summary

The MD8255A is a general purpose programmable I/O device designed for use with intel microprocessors. The MD8255A has 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation. In the first mode, each group of 12 I/O pins may be programmed in sets of 4 to be input of output.

Parametrics

MD8255A absolute maximum ratings: (1)ambient temperature under bias: 0 to 70℃; (2)storage temperature: -65 to 150℃; (3)voltage on any pin with respect to ground: -0.5 to 7V; (4)power dissipation: 1 Watt.

Features

MD8255A features: (1)MCS-85 compatible 8255A-5; (2)24 programmable I/O pins; (3)completely TTL compatible; (4)fully compatible with intel microprocessor families; (5)improved timing characteristics; (6)direct bit set/reset capability easing control application interface; (7)reduces system package count; (8)improved DC driving capability; (9)available in xepress; (10)40 pin DIP package.

Diagrams

MD8255A block diagram