MC3456 - Motorola

MC3456 DUAL TIMING CIRCUIT

Order this document by MC3456/D Dual Timing Circuit The MC3456 dual timing circuit is a highly stable controller capable of producing accurate time delays, or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor per .

Features

f 0.005% per °C Normally “On” or Normally “Off” Output Dual Version of the Popular MC1455 Timer P SUFFIX PLASTIC PACKAGE CASE 646 D SUFFIX PLASTIC PACKAGE CASE 751 (SO
  –14) PIN CONNECTIONS Discharge A Threshold A 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VCC Discharge B Threshold B Control B Reset B Output B Trigger B Figure 1. 22 Second Solid State Time Delay Relay Circuit 1.0 k MT2 3 10 k 5 0.01 µF 4 2 8 1/2 MC3456 1 6 7 1.0 µF C
  –10 V t = 1.1; R and C = 22 sec Time delay (t) is variable by changing R and C (see Figure 16). 1N4740 3.5 k 250 V 1N4003
  – 10 µF + R 20 M G MT1 Load 117 Vac/60 Hz Cont.