10
U6813B
4543A–AUTO–05/02
Table 2. Protection Versus Transient Voltages According to ISO TR 7637-1 Level 4 (Except Pulse 5)
16 Watchdog Timing Relative to f
WDC
16.1 Minimum pulse
duration for a
guaranteed WDI
input-pulse detection
2cyclesA
16.2 Frequency range for a
correct WDI signal
80 170 cycles D
16.3 Hysteresis range at
the WDI ok margins
1cycleA
16.4 Detection time for a
stucked WDI signal
(WDI dropout)
V
WDI
= constant 250 251 cycles A
Electrical Characteristics (Continued)
V
CC
= 5 V, T
amb
= -40 to +125°C; reference pin is GND or SGND (over- and under-voltage detection);
f
intern
= 200 kHz +50%/-45%, f
WDC
= 5 kHz ±10%; f
WDI
= 50 Hz, bootstrap capacitor C
Boot
= 47 nF at Pin CAPI
No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note: 1. If V
S
> 26 V the current has to be limited at 5 mA by an external resistor.
Pulse Voltage Source Resistance
(1)
Rise Time Duration Amount
1 - 110 V 10 W 100 V/s 2 ms 15.000
2 + 110 V 10 W 100 V/s 0.05 ms 15.000
3a - 160 V 50 W 30 V/ns 0.1 µs 1 h
3b + 150 V 50 W 20 V/ns 0.1 µs 1 h
5 55 V 2 W 10 V/ms 250 ms 20
Note: 1. In the case of the relay driver, the coil resistance of R
min
= 150 W has to be added to the source resistance.
