User's Guide

Chapter 3 – Electrical Characteristics
9
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 1.4 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
Power Consumption
Power Consumption in OFF Mode
Conditions I
NOM
I
MAX
Overall Consumption Off
5
mA 10 m A
Power Consumption in EGSM/GPRS 900 MHz and GSM/GPRS 850 MHz Mode
Conditions I
NOM
I
MAX
+5V During TX bursts @PcI5 1.7 A peak 2.0 A peak
+5V During RX bursts 75 mA peak 80 mA peak
+5V Average 1 Rx/1Tx @PcI5 270 mA 370 mA
+5V Average 1 Rx/1Tx @PcI8 180 mA 200 mA
+5V Average Idle Mode
100
mA 300 m A
+5V Average 1 GPRS CI 10 (3Rx/2Tx) @PcI5 540 mA 640 mA
+5V Average 1 GPRS CI 10 (3Rx/2Tx) @PcI8 360 mA 400 mA
+5V Average 1 Idle Mode 2.2 mA 3 mA
Power Control Level: PcI5=2W typ.; PcI8=0,5W typ.
Power Consumption in GSM/GPRS 1800 & 1900 MHz Modes
Conditions I
NOM
I
MAX
+5V During TX bursts @PcI0 1.3 A peak 1.7 A peak
+5V During RX bursts 75 mA peak 80 mA peak
+5V Average 1 Rx/1Tx @PcI0 240 mA 270 mA
+5V Average 1 Rx/1Tx @PcI3 150 mA 180 mA
+5V Average Idle Mode
100
mA 300 m A
+5V Average 1 GPRS CI 10 (3Rx/2Tx) @PcI0 480 mA 540 mA
+5V Average 1 GPRS CI 10 (3Rx/2Tx) @PcI3 300 mA 360 mA
+5V Average 1 Idle Mode 2.2 mA 3 mA
Power Control Level: PcI0=1W typ.; PcI3=0,25W typ.