Electrical, Reliability And Radio Characteristics; Absolute Maximum Ratings; Operating Temperatures - SimCom SIM548C HD V1.01 Hardware Design

SIM548C Hardware Design
Here are two GPS antenna manufacturers be recommended, you can visit their websites for details,
http://www.inpaq.com.tw and http://www.passivecomponent.com. But the GPS antenna choice
should base on the designing product and other conditions.
For detailed Antenna designing consideration, please refer to related antenna vendor's design
recommendation. The antenna vendor will offer further technical support and tune their antenna
characteristic to achieve successful GPS reception performance depends on the customer's design.

6 Electrical, reliability and radio characteristics

6.1 Absolute maximum ratings

Absolute maximum rating for power supply and voltage on digital and analog pins of SIM548C
are listed in table 33 and table 34.
Table 33: Absolute maximum ratings (GSM part)
Parameter
Peak current of power supply
RMS current of power supply (during one TDMA- frame)
Voltage at digital pins
Voltage at analog pins
Voltage at digit/analog pins in POWER DOWN mode
Table 34: Absolute maximum ratings (GPS part)
Parameter
Voltage at GPS_VCC
Current at GPS_VCC_RF

6.2 Operating temperatures

The operating temperature is listed in table35:
SIM548C_HD_V1.01
Min Max
0 3.0
0 0.7
-0.3 3.3
-0.3 3.0
-0.25 0.25
Min Max
-0.3 5
25
77
Unit
A
A
V
V
V
Unit
V
mA
09.05.2008