EIA Level Converter

This document is a technical schematic for an EIA Level Converter circuit, copyrighted by Digital Equipment Corporation in 1971. The circuit is designed to convert input signals from EIA levels to logic levels using a series of integrated circuits (DEC 1489, 7404, and 1488), capacitors, resistors, and diodes. The schematic provides detailed wiring diagrams, signal paths for both inputs and outputs, a power supply section involving +/- 15V lines, and a comprehensive parts list detailing the components, including specific Digital Equipment Corporation part numbers.