Motorola V186 - Cell Phone - GSM System Planner Manual page 52

I/O Circuit Diagram:
12V 12V
Floating
Voltage
Converter
Digital Output and Digital Input FET Modules
DO/DI - Typical I/O Circuit
5V
20KΩ
DI Status/
DO Back
Indication
DO
Control
* FET Always "OFF" in DI configuration "
48
Self Recovery Fuse
1A
*
33V
"
DO/DI
COM