H11G1 Datasheet, PDF (4/6 Pages) Motorola, Inc – 6-Pin DIP Optoisolators Darlington Output(On-Chip Resistors)

H11G1 H11G2 H11G3
INTERFACING TTL OR CMOS LOGIC TO 50–VOLT, 1000–OHMS RELAY
FOR TELEPHONY APPLICATIONS
In order to interface positive logic to negative–powered electromechanical relays, a change in voltage level and polarity plus
electrical isolation are required. The H11Gx can provide this interface and eliminate the external amplifiers and voltage divider
networks previously required. The circuit below shows a typical approach for the interface.
VDD
R
TO 1
CMOS
5V
180 Ω
1/4 W
TO 2
TO 1
TTL
TO 2
H11Gx
1
6
2
5
3
4
RELAY GROUND
50 mA
1000 Ω
1N4004
–50 V
4
Motorola Optoelectronics Device Data