M660

This document is a schematic diagram for the Digital Equipment Corporation's Positive Level Driver, model M660 (Part No. M660-0-1, Revision A), copyrighted in 1968.

It details the circuit design using integrated circuits (specifically DEC740IN, likely a TTL gate series), transistors (DEC3009B-S, equivalent to 2N3009), resistors, and capacitors, with connections to a +5V power supply and ground. Key notes include IC pin assignments (Pin 7 for GND, Pin 14 for +5V).

The document also provides a parts list (Bill of Materials) specifying component values, tolerances, and DEC part numbers, along with a transistor and diode conversion chart mapping DEC parts to EIA equivalents. A legal disclaimer states the schematic is for test and maintenance purposes, is proprietary, and copyrighted.