01 µF VDD 0.1 µF a. Increase VI from +33 V while monitoring VO. VStart (+) equals VI when VO commences switching. b. Decrease VI from
  –33 V while monitor.

Pin 1, 8 5 4 2, 3 7 6 Symbol AC1, AC2 RS RI RO1, RO2 RG RC Description The input terminals to the full
  –wave diode bridge. The ac ringing signal from the telephone line energizes the ringer through this bridge. The input of the thresho.

MC3401

MC34010

MC34012-1

MC34012-2

MC34012-3

MC34014

MC34017A

MC34018

MC340

MC34001

MC34001A

MC34001B

MC34002