Datasheet

Electrical specifications L4993
10/32 Doc ID 13517 Rev 8
Pin Symbol Parameter Test condition Min. Typ. Max. Unit
Vcw Icwd Discharge current
Vs = 13.5V,
Vcw = 2.5V
1.0 2.13 4.5 µA
Vcw Twop Watchdog period
Vs = 13.5V,
Ctw = 47nF
25 50 90 ms
Res twol Watchdog output low time
Vs = 13.5V,
Ctw = 47nF
6 10.5 22 ms
Table 8. Watchdog Enable
Pin Symbol Parameter Test condition Min. Typ. Max. Unit
WEn W
En_low
Enable input low voltage 1 V
WEn W
En_high
Enable input high voltage 3 V
WEn W
En_hyst
Enable input hysteresis 500 800 1100 mV
WEn I
leak
Pull down current WEn = 5V 2 8 20 µA
Table 7. Watchdog (continued)