HA16117FA HITACHI [Hitachi Semiconductor], HA16117FA Datasheet - Page 26
HA16117FA
Manufacturer Part Number
HA16117FA
Description
CMOS Watchdog Timer
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HA16117FA.pdf
(31 pages)
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HA16117F Series
26
100 m
10 m
0.56
Reset High Time vs. K
100 k
10 k
1 M
100
P-RUN input pulse duty cycle (%)
1 k
10
1
P-RUN normal frequency range
0.6
0
Duty-cycle dependence of
MPU system abnormal
MPU system abnormal
Abnormal if duty
cycle is 0%
MPU system normal
Tadj
Abnormal if duty
cycle is 100%
constant K
50
0.7
(Tadj
Constant)
100
0.8
5 V
0 V
generator
Notes: 1.
0.01
Pulse
0.01
2.
5 V
Normal detection is assumed when RES is not output.
The figure at left is for a constant P-RUN frequency.
See "8. Summary of cases where P-RUN frequency
fluctuates" for cases where the frequency fluctuates.
5 V
0.1
0.1
V
P-RUN ACC
C
C
V
P-RUN ACC
C
C
Test circuit
Test circuit
CC
F
R
CC
F
R
GND
RES
Tadj
GND
RES
Tadj
Oscilloscope
Oscilloscope
K =
R
750 R
510 R
R
1
2
R
1
R
+ R
2
2
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