Specifications

TC35 / TC37 Hardware Interface Description
TC35_37_HD_02_V03.10 - Released Page 74 of 92 21.12.2001
6 Electrical, temperature and radio characteristics
6.1 Absolute maximum ratings
Absolute maximum ratings for supply voltage and voltages on digital and analog pins of
TC35 and TC37 are listed in Table 26. Exceeding these values will cause permanent
damage to the GSM Engine. The supply current must be limited accordingly. The safety
status of the power supply is subject to SELV (as defined by EN60950)
Table 26: Absolute maximum ratings
Parameter Min Max Unit
Peak current of power supply 0 4.0 A
RMS current of power supply (during one TDMA-frame) 0 0.5 A
Voltage on digital pins *) -0.3 3.3 V
Voltage on analog pins *) -0.3 3.0 V
*)Valid only in IDLE and TALK mode, if in Power Down mode absolute maximum ratings are ± 0.25 V.
6.2 Operating conditions
Table 27: Operating conditions
Parameter Min Typ Max Unit
Ambient temperature -20 25 55 °C
Supply voltage V
BATT+
3.3 4.2 5.5 V
6.3 Temperature conditions
Test conditions were specified in accordance with IEC 60068-2 (still air).
Table 28: Temperature conditions
Parameter Min Typ Max Unit
Ambient temperature (regarding GSM 11.10) -20 25 55 °C
Restricted operation
*)
-25 to -20 55 to 70 °C
Automatic shutdown: if application is not battery powered
if application is battery powered
-25
-15
>70
**)
>60
**)
°C
°C
Storage temperature -40 +85 °C
Charging temperature (software controlled fast charging) 0 +45 °C
*)
GSM engine is operational, but deviations from the GSM specification may occur.
**)
Limited performance if V
BATT+ max
<4.0V and PCL5 is required at T
amb max
= 70°