The MA28155 is a general purpose programmable Input/Output device designed for use with the MAS281 microprocessor. It has 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation.

FEATURES
■ Radiation Hard to 1MRad (Si)
■ High SEU Immunity, Latch Up Free
■ Silicon-on-Sapphire Technology
■ 24 Programmable l/O Pins
■ All Inputs and Outputs are TTL Compatible
■ Direct Bit Set/Reset Capability Easing Control Application Interface
■ Replaces Several MSI Packages
■ Compatible with MAS281 (Mil-Std-1750A) Microprocessor