HA16117FA HITACHI [Hitachi Semiconductor], HA16117FA Datasheet - Page 9
HA16117FA
Manufacturer Part Number
HA16117FA
Description
CMOS Watchdog Timer
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HA16117FA.pdf
(31 pages)
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2. With a low-frequency P-RUN signal ( 13 Hz to 26 Hz)
P-RUN
RES
WD
C
C
Q
Q
C
A
B
R
F
3.6 V
0.9 V
3.2 V
1.6 V
5 V
0 V
5 V
0 V
When f
duty is 25% or above, multivibrator (power-on and auto-reset circuit) oscillation stops. As a
result, the RES signal is fixed high.
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
P-RUN
20 ms
is 13 Hz to 26 Hz, the WD duty (D = 100
60 ms
40 ms (25 Hz)
t
1
5 s
t
33 ms
2
2T
t
2
/2T) is 25% to 50%. When the WD
HA16117F Series
9
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