Electrical Characteristics And Power Consumption; Electrical Characteristics; Power Consumption - Multitech SocketModem GSM Hardware Manual

Electrical Characteristics and Power
Consumption
Note: These are preliminary measurements.

Electrical Characteristics

5V DC Characteristics (VDD = 5V ± 0.25V)
Digital Inputs
–DTR (40), –TXD (35), –RTS (33)
–RESET
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Digital Input Capacitance

Power Consumption

Power Consumption in EGSM900 and GSM850 @ 25 degrees C
Conditions
+5V During TX bursts @ 2W
+5V Average @ 2W
+5V Average @ 0.5W
+5V Average idle mode
Power Consumption in GSM1800 & 1900 MHz @ 25 degrees C
Conditions
+5V During TX bursts @1W
+5V Average @1W
+5V Average @ 0.25W
+5V Average idle mode
Power Consumption in EGSM/GPRS 900 MHz and GSM/GRPS 850 MHz Mode Class 10
Conditions
+5V During TX bursts @ 2W
+5V Average @ 2W
+5V Average @ 0.5W
+5V Average idle mode
Power Consumption in GSM/GRPS 1800 MHz and GSM/GRPS 1900 MHz Class 10
Conditions
+5V During TX bursts @ 1W
+5V Average @ 1W
+5V Average @ 0.25W
+5V Average idle mode
Multi-Tech Systems, Inc. SocketModem GSM Hardware Guide for Developers
= 5.25V
VDDMAX
Input High
Min 2.0V
Input High
Min 2.0V
Output High
Min 4V
I I
NOM MAX
1.2 A 1.3 A
250mA 320mA
180mA 200mA
15mA 25mA
I I
NOM MAX
1.1 A 1.2 A
210mA 235mA
165mA 185mA
15mA 25mA
I I
NOM MAX
1.2 A 1.3 A
420mA 470mA
280mA 320mA
15mA 25mA
I I
NOM MAX
1.1 A peak 1.2 A peak
350mA 400mA
180mA 210mA
15mA 25mA
Chapter 1 – SocketModem GSM
Input Low
Max 0.8V
Input Low
Max 0.5V
Output Low Current
Max 0.4V Drive: 2mA
5 pF
9