M617

This document is a proprietary schematic diagram, copyrighted by Digital Equipment Corporation in 1967, for a circuit titled "6-4 INPUT NOR BUFFERS M617." Intended for test and maintenance, the schematic details a circuit primarily composed of six 4-input NOR gates, identified as Integrated Circuit DEC7440N.

It also depicts a power conditioning and filtering section, including various resistors (330 Ohm, 750 Ohm) and capacitors (0.01 µF), along with components for +3V regulation. The schematic notes that Pin 7 on each IC connects to Ground and Pin 14 to +5V, while a -15V connection is explicitly marked as unused.

The document is identified as CS M617-0-1, Revision E, and includes a detailed parts list and a revision history.