HA16117F Datasheet, PDF (11/31 Pages) Hitachi Semiconductor – CMOS Watchdog Timer

HA16117F Series
4. With a 150 kHz P-RUN signal
When f_P-RUN is 100 kHz or above, the WD duty (D = 100 × (T − t₂)/2T) is 25% or below.
Therefore, C_R is discharged, and the RES signal is output at the instant that the pin potential
falls to the comparator circuit threshold value (V_TL = 1.6 V).
P-RUN
Q
Q
A
C_F
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
C_R
1.6 V
0V
H
B
L
H
C
L
H
RES
L
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