Multitech MultiModem iCell User Manual page 36

LEDS, CONNECTORS, AND SPECIFICATIONS
Configure Pin 3 as either Digital Input (3.3V tolerant TTL/CMOS levels), Digital Output (3.3V High) or as an
ADC input (0 to 3.3V rail)
Configure Pin 4 as either Digital Input (3.3V tolerant TTL/CMOS levels), Digital Output (3.3V High) or as an
ADC input (0 to 3.3V rail)
Pin 5, ADC input (0 to 3.3V rail)
Pin 6 is GND and must be connected to the ground of the attached device
GPIO DC Characteristics
Pins 1-5 contain ESD protection.
Pins 1, 2 Input Voltage
Parameter
Input Low-level Voltage
Input High-level Voltage
Pins 1,2 are digital input only.
Pins 3,4 Input Voltage
Parameter
Input Low-level Voltage
Input High-level Voltage
Pins 3,4 Output Voltage
Parameter
Output Low-level Voltage
Output High-level Voltage
Pins 3,4 Output Current
Parameter
Output Current
36
Min
0.3
3.0
Min
-0.3
2.0
Min
0.0
2.9
Min
-
Max
1.0
24
Max
0.8
5.5
Max
0.4
3.3
Max
2
MultiModem
Units
V
V
Units
V
V
Units
V
V
Units
mA
®
iCell MTCMR User Guide