HA16117F Datasheet, PDF (28/31 Pages) Hitachi Semiconductor – CMOS Watchdog Timer

HA16117F Series
P-RUN Low Threshold Frequency vs. C_F Capacitance
1k
Ta = 25°C
Normal
5V
100
C_R = 0.01 µF
C_R = 0.1 µF
Abnormal
10
C_R = 1.0 µF
Pulse
generator
C_F
V_CC
Tadj
P-RUN ACC
C_F
GND
C_R
RES
51 k
75 k
Oscilloscope
C_R
Test circuit
Notes: 1. Normal detection is assumed when RES is not output.
1
500 p 1000 p
0.01 µ 0.03 µ
2. The figure at left is for a constant P-RUN frequency.
External Capacitance C_F (F)
P-RUN Input Frequency vs. Ambient Temperature
1M
100 k
10 k
P-RUN abnormal
f_H
P-RUN normal
1k
5V
duty 50%
Pulse
generator
100
f_L
0.01 µ
V_CC
Tadj
P-RUN ACC
C_F
GND
C_R
RES
510 k
750 k
0.1 µ
Oscilloscope
10
Test circuit
P-RUN abnormal
1
−30 0
50
85
Ambient temperature Ta (°C)
Notes: 1. Normal detection is assumed when RES is not output.
2. The figure at left is for a constant P-RUN frequency.
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