Datasheet

Data Sheet 8 Rev. 2.7, 2007-06-25
TLE 4271-2
Reset Generator
Switching threshold
V
RT
4.5 4.65 4.8 V –
Reset high voltage
V
ROH
4.5––V–
Saturation voltage
V
RO,SAT
–60–mVR
intern
= 30 kΩ;
1.0 V ≤
V
Q
≤ 4.5 V
Saturation voltage
V
RO,SAT
– 200 400 mV I
R
= 3 mA
2)
;
V
Q
= 4.4 V
Reset pull-up
R 18 30 46 kΩ internally connected
to Q
Lower reset timing
threshold
V
LD
0.2 0.45 0.8 V V
Q
< V
RT
Charge current I
D
81425µA V
D
= 1.0 V
Upper timing
threshold
V
UD
1.4 1.8 2.3 V –
Delay time
t
D
8 1318msC
D
= 100 nF
Reset reaction time
t
RR
––3µs C
D
= 100 nF
Overvoltage Protection
Turn-off voltage
V
I, ov
40 44 46 V –
Inhibit
Turn-on voltage
V
U,INH
1.0 2.0 3.5 V V
Q
= high (> 4.5 V)
Turn-off voltage
V
L,INH
0.8 1.3 3.3 V V
Q
= low (< 0.8 V)
Inhibit current
I
INH
81225µA V
INH
= 5 V
Watchdog
Upper watchdog
switching threshold
V
UDW
1.4 1.8 2.3 V –
Lower watchdog
switching threshold
V
LDW
0.2 0.45 0.8 V –
Discharge current
I
DWD
1.5 2.7 3.5 µA V
D
= 1 V
Charge current
I
DWC
81425µA V
D
= 1 V
Watchdog period
t
WD,P
40 55 80 ms C
D
= 100 nF
Table 4 Characteristics (cont’d)
V
I
= 13.5 V; -40 °C ≤ T
j
≤ 125 °C; V
INH
> V
U,INH
(unless otherwise specified)
Parameter Symbol Limit Values Unit Test Condition
Min. Typ. Max.