Specifications

Chapter1–ProductDescriptionandSpecifications
Multi‐TechSystems,Inc.MultiModemiCellUserGuide 24
GPIODCCharacteristics
Pins1,2,InputVoltage
Parameter Min Max Units
InputLow‐levelVoltage 0.3 1.0 V
InputHigh‐levelVoltage 3.0 24 V
Pins3,4,InputVoltage
Parameter Min Max Units
InputLow‐levelVoltage‐0.3 0.8 V
InputHigh‐levelVoltage 2.0 5.5 V
Pins3,4,OutputVoltage
Parameter Min Max Units
OutputLow‐levelVoltage 0.0 0.4 V
OutputHigh‐levelVoltage 2.9 3.3 V
Pins3,4,OutputCurrent
Parameter Min Max Units
OutputCurrent 2 mA
Pins1,2aredigitalinputonly.
Pin5isananaloginput
only.
Pins1‐5containESDprotection.
RS2329PinFunctionsoftheFemaleEndConnector
ExternalPower SerialCable
FemaleConnector

Signal IN/OUT
Pin1CD O
Pin2RX O
Pin3TX I
Pin4DTR I
Pin5GND ‐‐
Pin6DSR O
Pin7RTS I
Pin8CTS O
Pin9RI O
