Datasheet

Electrical Characteristics Reset Function
V
I
= 13.5 V, -40 °C ≤ T
j
≤ 150 °C, all voltages with respect to ground, positive current flowing into pin
(unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
Default Output Undervoltage Reset
Switch
ing Thresholds
V
RT
4.5 4.65 4.8 V V
Q
decreasing
Reset Adjust
Switching Threshold
V
RADJ,th
1.26 1.35 1.44 V 3.5 V ≤ V
Q
< 5 V
Reset Adjustm
ent Range
1)
1) V
RT
is scaled linearly, in case the Reset Switching Threshold is modified
V
RT,range
3.50 – 4.65 V –
Reset Output Low Voltage
V
RO,low
– 0.1 0.4 V 1 V ≤ V
Q
≤ V
RT
no external R
RO,ext
Reset Output Internal Pull-Up
Resistor to
V
Q
R
RO
10 20 40 kΩ –
Optional Reset Output External
Pull-up Resistor to
V
Q
R
RO,ext
20 – – kΩ
1 V ≤
V
Q
≤ V
RT
;
V
RO
≤ 0.4 V
Delay Pin Output Voltage
V
D
– – 5 V –
Power On Reset Delay Time
t
rd
17 28 39 ms C
D
= 100 nF
Upper Delay
Switching Threshold
V
DU
– 1.8 – V –
Lower Delay
Switching Threshold
V
DL
– 0.45 – V –
Delay Capacitor
Charge Current
I
D,ch
– 6.5 – µA V
D
= 1 V
Delay Capacitor
Reset Discharge Current
I
D,dch
– 70 – mA V
D
= 1 V
Delay Capacitor
Discharge Time
t
rr,d
– 1.9 3 µs Calculated Value:
t
rr,d
= C
D
*(V
DU
-
V
DL
)/ I
D,dch
C
D
= 100 nF
Internal Reset Reaction Time
t
rr,int
– 3 7 µs C
D
= 0 nF
2)
2) parameter not subject to production test; specified by design
Reset Reaction Time t
rr,total
– 4.9 10 µs Calculated Value:
t
rr,total
= t
rr,int
+ t
rr,d
C
D
= 100 nF
TLE42694
Block Description and Electrical Characteristics
Data Sheet 21 Rev. 1.2, 2010-11-26
Output Undervoltage Reset
5.3.1
Output Undervoltage Reset Threshold Adjustment
5.3.2
5.3.3
Reset Output RO
5.3.4
5.3.5
5.3.6
Reset Delay Timing
5.3.7
5.3.8
5.3.9
5.3.10
5.3.11
5.3.12
5.3.13
5.3.14
5.3.15