M178

This document is a schematic diagram for a Digital Equipment Corporation (DEC) 8x6 Data Mixer, model M178-0-1, revision B, copyrighted 1970.

The circuit primarily consists of a large array of logic gates implemented using DECIO74H62 and DECIO74H53 integrated circuits (ICs), with specific pin assignments for power (Pin 7 to GND, Pin 14 to +5V). It also includes power supply filtering and decoupling using various capacitors (e.g., .01 MFD and 39 MFD) and resistors, connected to +5V power rails.

The schematic was drawn by Allan Ritcey on January 20, 1970, and underwent engineering and production approvals, with the final production approval on October 20, 1970. A note at the top indicates that the schematic is furnished solely for training and maintenance, and the circuits are proprietary.