Datasheet

L4995 Electrical specifications
Doc ID 13103 Rev 14 11/35
Table 7. Watchdog
Pin Symbol Parameter Test condition Min. Typ. Max. Unit
W
i
Vih Input high voltage V
S
= 13.5V 3.5 V
W
i
Vil Input low voltage V
S
= 13.5V 1.5 V
W
i
Vih Input hysteresis V
S
= 13.5V 500 mV
W
i
I
wi
Pull down current
V
S
= 13.5V
V
wi
= 3.5V
610 µA
V
cw
V
wlth
Low threshold V
S
= 13.5V 10% 13% 16% V
o_ref
V
cw
V
whth
High threshold V
S
= 13.5V 44% 47% 50% V
o_ref
V
cw
I
cwc
Charge current
V
S
= 13.5V,
V
cw
= 0.1V
51020 µA
V
cw
I
cwd
Discharge current
V
S
= 13.5V,
V
cw
= 2.5V
1.25 2.5 5 µA
V
cw
T
wop
Watchdog period
V
S
= 13.5V,
C
tw
= 47nF
20 40 80 ms
R
es
t
wol
Watchdog output low time
V
S
= 13.5V,
C
tw
= 47nF
4816ms
Table 8. Enable
Pin Symbol Parameter Test condition Min. Typ. Max. Unit
E
n
V
En_low
E
n
input low voltage 1 V
E
n
V
En_high
E
n
input high voltage 3 V
E
n
V
En_hyst
E
n
input hysteresis 830 mV
E
n
I
En
Pull down current V
S
= 13.5V 10 18 µA