6-4 Input Nand Gates Mi17

This document is a technical schematic for the Digital Equipment Corporation M117 circuit board, featuring 6-4 input NAND gates. The diagram displays the layout of three integrated circuits (E1, E2, and E3), which use the DEC7420N chip. It includes power distribution notes (Pin 7 for Ground and Pin 14 for +5V), a bias circuit composed of resistors and capacitors, and a complete parts list identifying specific electrical components required for the assembly.