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XT65/XT75 Hardware Interface Overview
6.2 Operating Temperatures
6.2
Operating Temperatures
Table 12: Board temperature
Parameter
1
Automatic shutdown
Temperature measured on XT65/XT75 board
Temperature measured at battery NTC
1.
Due to temperature measurement uncertainty, a tolerance on the stated shutdown thresholds may occur.
The possible deviation is in the range of ± 3°C at the overtemperature limit and ± 5°C at the undertem-
perature limit.
Table 13: Ambient temperature according to IEC 60068-2 (without forced air circulation)
Parameter
Operating temperature range
Restricted operation (with VBATT ≤ 3,8V)
1
Restricted operation
1.
Restricted operation allows normal mode speech calls or data transmission for limited time until automatic
thermal shutdown takes effect. For operating the XT75/65 above an expected ambient temperatures of
75°C please contact Siemens Application Engineering. The duration of emergency calls is unlimited be-
cause automatic thermal shutdown is deferred until hang up.
Table 14: Charging temperature
Parameter
Battery temperature for software controlled fast charging
(measured at battery NTC)
XT65_XT75_HO_v00.130
Confidential / Preliminary
Min
-30
-20
Min
-30
Min
0
Page 30 of 67
s
Typ
Max
Unit
---
>+80
°C
---
+60
Typ
Max
Unit
+25
+65
°C
+70
°C
---
+70 to
°C
+85
Typ
Max
Unit
---
+45
°C
2006-10-12
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