Data Sheet

8

Rev. 1.5, 2007-03-20

TLE 4268

Note: The reset output is low in range from

V

Watchdog

Discharge current

I

D,d

1.5

3.5

5.2

µA

V

Charging current

I

D,c

512

18

µA

V

Upper timing

threshold

V

DU

1.4

1.8

2.2

V

–

Lower timing

threshold

V

DWL

0.2

0.4

0.55

V

–

Watchdog period

T

WP

30

55

75

ms

C

Watchdog trigger time

T

WT

25

40

60

ms

C

Activating current

I

Q

2

8

15

mA

Activates watchdog

Slew rate

d

V

5

––V/

µs from 20% up to

80%

V

Q

2)

1) Drop voltage =

V

obtained at 13.5 V input)

2) Watchdog pulse recognition tested with 10 kHz max. pulse frequency

Table 5

Characteristics (cont’d)

V

Parameter

Symbol

Limit Values

Unit

Test Condition

Min.

Typ.

Max.