HA16117F Series
2. With a low-frequency P-RUN signal ( 13 Hz to 26 Hz)
When fP-RUN is 13 Hz to 26 Hz, the WD duty (D = 100 × t2/2T) is 25% to 50%. When the WD
duty is 25% or above, multivibrator (power-on and auto-reset circuit) oscillation stops. As a
result, the RES signal is fixed high.
40 ms (25 Hz)
H
P-RUN
L
H
Q
Q
A
L
2T
H
L
H
L
5 V
3.6 V
CF
0.9 V
0 V
t1 5 µs
H
WD
t2
33 ms
L
5 V
3.2 V
1.6 V
CR
0 V
H
B
C
L
H
L
H
60 ms
RES
L
20 ms
9