Multitech SocketModem EDGE, Developer'S Manual, Page: 12 / 23

Chapter 3 – Electrical Characteristics
Multi-Tech Systems, Inc. SocketModem EDGE Embedded Wireless Modem Developer’s Guide (S000376A) 12
Chapter 3 – Electrical Characteristics
Electrical characteristics for the 5V Serial SocketModem are presented in this chapter.
I/O Electrical Characteristics
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 .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
Voice Mode Power Consumption
GSM Call Power Consumption in EGSM900 and GSM850 @25 degrees C
Conditions I
NOM
I
MAX
+5V During TX bursts @2W 1.2 A 1.3 A
+5V Average @ 2W 250 mA 320 mA
+5V Average @ ).5W 180 mA 200 mA
+5V Average idle mode 15 mA 25 mA
GSM Call Power Consumption in GSM1800 & 1900 MHz @25 degrees C
Conditions I
NOM
I
MAX
+5V During TX bursts @1W 1.1 A 1.2 A
+5V Average @1W 210 mA 235 mA
+5V Average @ 0.25W 165 mA 185 mA
+5V Average idle mode 15 mA 25 mA
Data Mode Power Consumption
GPRS Class 10 Power Consumption in EGSM/GPRS 900 MHz and GSM/GRPS 850 MHz Mode
Conditions I
NOM
I
MAX
+5V During TX bursts @ 2W 1.2 A 1.3 A
+5V Average @ 2W 420 mA 470 mA
+5V Average @ 0.5W 280 mA 320 mA
+5V Average idle mode 15 mA 25 mA
GPRS Class 10 Power Consumption in GSM/GRPS 1800 MHz and GSM/GRPS 1900 MHz
Conditions I
NOM
I
MAX
+5V
During TX bursts @ 1W 1.1 A peak 1.2 A peak
+5V Average @ 1W 350 mA 400 mA
+5V Average @ .25W 180 mA 210 mA
+5V Average idle mode 15 mA 25 mA
EGPRS Class 10 Power Consumption in EGRPS 1800 MHz and EGRPS 1900 MHz
Conditions I
NOM
I
MAX
+5V During TX bursts @ 5W 1.4 A peak 1.6 A peak
+5V Average @ .5W 430 mA 525 mA
+5V Average @ .25W 375 mA 450 mA
+5V Average idle mode 15 mA 25 mA