FM MODULE B250

This document provides the schematic for the FM Module B250, a proprietary component from Digital Equipment Corporation. It includes component specifications, such as resistors (1/4W, 5%) and diodes (D664), and identifies the integrated circuits used (E7-E19 as Texas Instruments SN7440N or Fairchild U6A900959X, and E1-E6 as Fairchild U6A903059X). The diagram details the electrical interconnections, including pin assignments, power specifications (+1.8V and -3V), and capacitance requirements.