User's Manual
Table Of Contents
- Contents
- Figures
- Tables
- Document History
- Introduction
- Product concept
- Application Interface
- Antenna interface
- Electrical, reliability and radio characteristics
- Mechanics
- Reference Approval
- List of parts and accessories
MC46 Hardware Interface Description
DRAFT
MC46_HD_V02.8xb Page 70 of 98 21.08.2003
5 Electrical, reliability and radio characteristics
5.1 Absolute maximum ratings
Absolute maximum ratings for supply voltage and voltages on digital and analog pins of
MC46 are listed in Table 25. Exceeding these values will cause permanent damage to
MC46.
The power supply shall be compliant with the SELV safety standard defined in EN60950.
The supply current must be limited according to Table 25.
Table 25: 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 0.7 A
Voltage at digital pins -0.3 3.3 V
Voltage at analog pins -0.3 3.0 V
Voltage at digital / analog pins in POWER DOWN mode -0.25 +0.25 V
Voltage at POWER pin 15 V
Voltage at CHARGE pin 15 V
Differential load resistance between EPNx and EPPx 15
W
5.2 Operating temperatures
Test conditions were specified in accordance with IEC 60068-2 (still air). The values stated
below are in compliance with GSM recommendation TS 51.010-01.
Table 26: Operating temperatures
Parameter Min Typ Max Unit
Ambient temperature (according to GSM 11.10) -20 25 55 °C
Restricted operation
*)
-25 to -20 55 to 70 °C
Automatic shutdown
MC46 board temperature
Battery temperature
-29
-18
>70
**)
>60
°C
°C
Charging temperature (software controlled fast charging) 0 +45 °C
*)
MC46 works, but deviations from the GSM specification may occur.
**)
Consider the ratio of output power, supply voltage and operating temperature: To achieve
T
amb max
= 70°C and, for example, GSM 850 PCL5 the supply voltage must not be higher than
4.0V.