Power Supply Pins Electrical Interface - Multitech MMCModem MTMMC-G-F4 Developer's Manual

Power Supply Pins Electrical Interface

The main power supply is provided through a double connection. These connections are
respectively pins 3 and 4 for the +5V and the pins 1 and 2 for the ground (GND). The pins 6,
21, and 24 are also ground connection in order to produce a proper ground plane.
A 5V +/-5% - 1.3A power is strictly required to supply the modem. However, the power supply
does not have to constantly deliver 1.3A current at 5V.
This power supply is internally regulated to a nominal value VBATT.
Note: TXD, DTR, RTS input signals are 5V tolerant (these signals are the only 5V
tolerant signals)
Power Supply Pin Description
Pin # Name
1 GND
2 GND
3 +5V
4 +5V
6 GND
21 GND
24 GND
Power Consumption of the Power Supply Electrical Interface
Power Consumption in E-GSM900 & GSM850 @ 25 degrees C – Class 5
+5V
+5V
+5V
+5V
Power Consumption in GSM1800 & 1900 MHz @ 25 degrees C – Class 5
+5V
+5V
+5V
+5V
Power Consumption in E-GSM/GPRS 900 MHz & GSM/GRPS 850 MHz Mode – Class 10
+5V
+5V
+5V
+5V
Power Consumption in GSM/GRPS 1800 MHz & GSM/GRPS 1900 MHz – Class 10
+5V
+5V
+5V
+5V
Multi-Tech Systems, Inc. MMCModem GPRS Developer's Guide (S000445D)
Description Comment
Ground High Current
Ground High Current
Ground High Current
Ground High Current
Ground High Current
Ground High Current
Ground High Current
Conditions
During TX bursts @2W
Average @ 2W
Average @ ).5W
Average idle mode
Conditions
During TX bursts @1W
Average @1W
Average @ 0.25W
Average idle mode
Conditions
During TX bursts @ 2W
Average @ 2W
Average @ 0.5W
Average idle mode
Conditions
During TX bursts @ 1W
Average @ 1W
Average @ .25W
Average idle mode
Chapter 3 – Electrical Characteristics
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
15