6-4 Input Nor Buffers M617

This document is a technical schematic for the "6-4 Input Nor Buffers M617," created by the Digital Equipment Corporation in 1967. It illustrates the circuitry for six-input NOR gates using DEC7440N integrated circuits. The diagram details the signal inputs (A through U), the pin configurations for the integrated circuits (pin 7 for GND, pin 14 for +5V), and a reference circuit including resistors and capacitors used to regulate voltage levels. A parts list is included, identifying the specific electrical components required for the assembly.