HA16113FPJ Datasheet, PDF (13/18 Pages) Hitachi Semiconductor – Dual Watchdog Timers

HA16113FPJ
140
120
100
ton (ms) ⁸⁰
12 V
RES1, RES2
C_R1, C_R2 Rf NMI
ton characteristic
Vary the external capacitance (C_R) and
resistance (Rf) that determine the ton time
and measure the variation in ton.
(Same for RES1 and RES2)
Cf = 0.22 µF
Measure with
oscilloscope
60
Cf = 0.1 µF
40
20
Cf = 0.047 µF
0
60
100
140
180
220
260
Rf resistance (kΩ)
toff characteristic
400
Vary the external capacitance (C_R) and
resistance (Rf) and measure the variation
RES1
RES2
in t_off . (Same for RES1 and RES2)
300
toff (ms) ₂₀₀
C_R = 0.22 µF
100
0
60
100
140
180
Rf resistance (kΩ)
C_R = 0.1 µF
C_R = 0.047 µF
220
260
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