HA16117 Ver la hoja de datos (PDF) - Hitachi -> Renesas Electronics

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HA16117

CMOS Watchdog Timer

Hitachi -> Renesas Electronics 

HA16117F Series

4. With a 150 kHz P-RUN signal

When fP-RUN is 100 kHz or above, the WD duty (D = 100 × (T − t2)/2T) is 25% or below.

Therefore, CR is discharged, and the RES signal is output at the instant that the pin potential

falls to the comparator circuit threshold value (VTL = 1.6 V).

P-RUN

Q

Q

A

CF

H

L

H

L

H

L

H

L

5V

3.6 V

0.9 V

0V

H

WD

L

5V

6.6 µs (150 kHz)

2T

t1 5 µs

3.2 V

CR

1.6 V

0V

H

B

L

H

C

L

H

RES

L

11

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