HA16117F Datasheet, PDF (8/31 Pages) Hitachi Semiconductor – CMOS Watchdog Timer

HA16117F Series
1. When P-RUN signal is not input
The watchdog filter circuit output (WD) is fixed low, so the RES signal is output as shown in
the figure below in accordance with power-on and auto-reset circuit C_R charge/discharge.
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
20 ms
60 ms
8