4 Bit Adder

Summary: This document provides the schematic diagrams and technical specifications for the M142 4-Bit Adder, a digital logic component manufactured by Digital Equipment Corporation.

The document is divided into two sheets:

• Sheet 1 details the general information, logic definitions for both low-input and high-input configurations, and the mathematical logic behind the sum and carry operations (including XOR, AND, and OR functions based on various enables). It also contains a parts list for the assembly.
• Sheet 2 displays the physical schematic of the logic gates (using H53, H52, H50, H55, H59, and H11 series ICs) and provides a detailed bill of materials, including capacitors, resistors, and integrated circuits required to construct the 4-bit adder module.

The schematic includes notes regarding signal naming conventions (where circles represent low-assertion signals) and guidelines for component values (e.g., 1/4W resistors and .1µF capacitors).