DSB75 Development Support Board Rev. B1 Hardware Description
Confidential / Released
DSB75_hd_v12
Page 81 of 96
2008-08-26
8
Technical Data of DSB75
Table 34: DSB75 maximum ratings
Parameter
Condition
Min.
Max.
Unit
Supply voltage
Laboratory PSU
-30
+30
V
Operating temperature
+15
+35
°C
Storage temperature
-40
+85
°C
Table 35: DSB75 technical data
Parameters
Condition
Min.
Typical
Max.
Unit
Supply current peak
1
A
Supply current average
Laboratory PSU at 9V
requirements during
GSM transmission
300
400
mA
Supply voltage
8.5
9.0
15
V
Nominal supply voltage
for the GSM module
(adjustable)
2.85
4.1 *)
4.55
V
Minimum supply
voltage for GSM
module (adjustable)
2.85 3.5*) 4.55 V
V
BATT+
output voltage
*) for module MC75,
adjusted values
dependent on module
hardware
Maximum supply
voltage for GSM
module
4.45 4.5 4.55 V
VEXT
Switched logic high
level voltage (on if
GSM module on)
I
O
max = 50mA
2.75 2.93 3.05 V
3V0
Supply voltage for
DSB75 circuits
2.95
2.975
3.00
V
VDD
Supply voltage for the
pull-up resistors and
external use
I
O
max = 50mA
2.8 2.9 3.0 V
+5V
Audio interface supply
voltage
Audio interface supply
voltage
4.75 5.0 5.25 V
