HA16117F Datasheet, PDF (10/31 Pages) Hitachi Semiconductor – CMOS Watchdog Timer

HA16117F Series
3. With a 10 kHz P-RUN signal
When f_P-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
C_F
0.9 V
0V
H
WD
L
5V
3.2 V
C_R
1.6 V
0V
H
B
L
H
C
L
H
RES
L
100 µs (10 kHz)
2T
t₁ 5 µs
10