User's Manual

PART 2 – Embedded Wireless Modems Chapter 3 – SocketModem CDMA
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342K) 67
DC Electrical Characteristics
5VDC Characteristics (VDD = 5V ± 0.2V)
VDDMAX
= 5.25V
Digital Inputs
–DTR (40), –TXD (35), –RTS (33)
Input High
Min 2.0V
Input Low
Max 0.8V
–
RESET Input High
Min 2.0V
Input Low
Max 0.5V
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Output High
Min 4V
Output Low
Max 0.4V
Current Drive:
2mA
Digital Input Capacitance 5 pF
Power Measurements*
Operating Mode Band Average (mA)
CDMA RXTX Cellular 615
Full Power PCS 770
CMA RXTX
Average Power
Cellular 340
PCS 445
CDMA Standby Cellular 20
PCS 20
* Multi-Tech Systems, Inc. recommends that the customer incorporate a 10% buffer into their power source when
determining product load.