Three 2-2-2-3 And-Nor Gates M171

This document is a technical schematic for a Digital Equipment Corporation circuit board, specifically the "Three 2-2-2-3 AND-NOR GATES" module (M171).

The schematic includes:

• Logic Circuitry: The upper portion displays the logic diagram for three 2-2-2-3 AND-NOR gates, utilizing DEC 1074H53 integrated circuits.
• Power and Filtering: It shows the +5V power distribution and associated capacitor filtering network.
• Component Layout: The lower section provides a physical representation of the IC placements (E1, E2, E3) and associated resistors and capacitors.
• Parts List: A comprehensive table identifies the specific components used, including the etched circuit board, integrated circuits, resistors, capacitors, and mounting hardware (eyelets and handles).