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

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HA16117

CMOS Watchdog Timer

Hitachi -> Renesas Electronics 

HA16117F Series

3. With a 10 kHz P-RUN signal

When fP-RUN is 10 kHz, the WD duty (D = 100 × (T − t2)/2T) is 48%. As the duty is above

25%, the multivibrator (power-on and auto-reset circuit) does not oscillate. The RES signal

remains high.

H

P-RUN

L

H

Q

L

H

Q

L

H

A

L

5V

3.6 V

CF

0.9 V

0V

H

WD

L

5V

3.2 V

CR

1.6 V

0V

H

B

L

H

C

L

H

RES

L

100 µs (10 kHz)

2T

t1 5 µs

10

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