Specifications

Chapter 9 – SocketModem CDMA (MTSMC-C)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342C) 125
SocketModem Configuration
Serial Configuration
The SocketModem CDMA uses a 13-pin interface.
Note: The bolded, shaded pins are the SocketModem CDMA active pins.
SocketModem CDMA Pinout
Electrical Characteristics
Electrical characteristics for the 5V Serial SocketModem are presented in this chapter.
5 Vdc Characteristics (TA = -20° C to 55° C; VDD = 5 V ± 0.25 V)
VDDMAX
= 5.25 V
Digital Inputs
–DTR (40), –TXD (35), –RTS (33), –RESET (24)
Input High
Min 3.675 V
Input Low
Max 0.7 V
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Output High
Min. 4 V
Output Low
Max 0.4 V
Current Drive:
2 mA
Digital Input Capacitance 5 PF
Power Consumption
Operating Mode Band Average (mA)
CDMA RXTX Cellular 615
Full Power PCS 770
Cellular 340 CMA RXTX
Average Power
PCS 445
Cellular 20 CDMA Standby
PCS 20