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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)
Digital Inputs
–DTR (40), –TXD (35), –RTS (33), –RESET (24)
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Digital Input Capacitance
Voice Mode Power Consumption
GSM Call Power Consumption in EGSM900 and GSM850 @25 degrees C
Conditions
+5V
During TX bursts @2W
+5V
Average @ 2W
+5V
Average @ ).5W
+5V
Average idle mode
GSM Call 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
Data Mode Power Consumption
GPRS Class 10 Power Consumption in EGSM/GPRS 900 MHz and GSM/GRPS 850 MHz Mode
Conditions
+5V
During TX bursts @ 2W
+5V
Average @ 2W
+5V
Average @ 0.5W
+5V
Average idle mode
GPRS Class 10 Power Consumption in GSM/GRPS 1800 MHz and GSM/GRPS 1900 MHz
Conditions
+5V
During TX bursts @ 1W
+5V
Average @ 1W
+5V
Average @ .25W
+5V
Average idle mode
EGPRS Class 10 Power Consumption in EGRPS 1800 MHz and EGRPS 1900 MHz
Conditions
+5V
During TX bursts @ 5W
+5V
Average @ .5W
+5V
Average @ .25W
+5V
Average idle mode
Multi-Tech Systems, Inc. SocketModem EDGE Embedded Wireless Modem Developer's Guide (S000376A)
Chapter 3 – Electrical Characteristics
VDDMAX = 5.25 V
Input High
Input Low
Min 3.675 V
Max .7 V
Output High
Output Low
Min. 4 V
Max 0.4 V
I
I
NOM
MAX
1.2 A
1.3 A
250 mA
320 mA
180 mA
200 mA
15 mA
25 mA
I
I
NOM
MAX
1.1 A
1.2 A
210 mA
235 mA
165 mA
185 mA
15 mA
25 mA
I
I
NOM
MAX
1.2 A
1.3 A
420 mA
470 mA
280 mA
320 mA
15 mA
25 mA
I
I
NOM
MAX
1.1 A peak
1.2 A peak
350 mA
400 mA
180 mA
210 mA
15 mA
25 mA
I
I
NOM
MAX
1.4 A peak
1.6 A peak
430 mA
525 mA
375 mA
450 mA
15 mA
25 mA
Current Drive:
2 ma
5 PF
12
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