M241

This document is a proprietary schematic diagram from Digital Equipment Corporation (DEC), dated December 17, 1970, for their M241 module. The circuit implements six Type D Flip-Flops.

Key features include:

• Purpose: Primarily for test and maintenance purposes, with the circuits being proprietary to DEC.
• Main Components: It utilizes three DEC1074H74 Integrated Circuits (IC's), along with discrete transistors (DEC 3009B, DEC 2219), various diodes (including a 1N752A Zener), resistors, and capacitors.
• Power Supplies: The circuit operates with +5V, +2.8V, +0.8V, and -15V rails.
• General Specifications: Default values are provided for components: capacitors are .01uF, 100V, 20%; resistors are 1/4W, 5%; and general diodes are D662. All ICs are specified to have Pin 7 as Ground and Pin 14 as +5V.
• Supporting Information: The document includes a detailed parts list with component part numbers, descriptions, and quantities, and a transistor and diode conversion chart providing equivalent part numbers.