Data Sheet AS8446

Revision 1.8, Date 2005-03-17

Page 33 of 35

The trigger of the watch dog is done by the high / low edge of the external signal WD (start of the counter). The output signal of

the watch dog WDout goes high if the watch dog time is over.

The output signal of the watch dog WDout or the nPOR are generate the low active signal RESET (used for external

µP only):

if nPOR = low or (WDout = high) and R16<0> = high)

à RESET = low

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

NOTE

time out of the watch dog

110

160

190

ms

RESET pulse duration

14

20

25

µs

Package Drawing and Marking

Figure 14

Physical Dimensions (SOIC28) of AS 8446

Physical Dimensions SOIC28 (millimeters)

D

E

H

A

A1

e

b

L

α

MIN.

17.81

7.42

10.16

2.46

0.127

0.35

0.61

0 °

NOM.

17.93

7.52

10.31

2.56

0.22

0.41

0.81

5 °

MAX.

18.06

7.59

10.41

2.64

0.29

1.27 BSC

0.48

1.02

8 °

EH

12 3

A

A1

e

b

D

TOP VIEW

SIDE VIEW

END VIEW

L

α