M250

This document is a schematic diagram and parts list for a "4 BIT 16 WORD MEMORY M250" module (Number M250-0-1, Revision A), created by Digital Equipment Corporation.

The schematic details the interconnections of a primary integrated circuit (IC) identified as DEC9035 (Item 7 in the parts list), showing its address inputs (A0-A17), data inputs (D0-D3), chip select, write enable, and data outputs (N2, P2, R2, S2). It also includes two capacitors (C1: 0.1uF, 100V, 20% Disc and C2: 68uF, 15V, 10% S. Tant) for power conditioning (+5V and ground connections).

The accompanying parts list specifies all components required for the module, including a handle, eyelets, the DEC 9035 IC, the two capacitors, an etched circuit board, and documentation related to the module's history and layout.

A disclaimer notes that the schematic, copyrighted 1970, is for test and maintenance purposes, and the circuits are proprietary. The document was drawn by Nancy Moore on 11/12/70 and approved on 12/28/70.