HA16129FPJ Datasheet, PDF (17/23 Pages) Hitachi Semiconductor – Single Watchdog Timer

HA16129FPJ
Operating Waveforms
Frequency vs. Duty Characteristics
100k
Ta = 25°C, C_R = 0.1µF, R_R = 180kΩ,
R_T = 390kΩ, Rf = 180kΩ, Cf = 3300pF
C_RES = 1500pF
Runaway area
RES and OUTE
runaway detection
lines
OUTE normal
10k
recovery line
Normal area
1k
RES ^Monitor
OUTE
Pulse generator
V_OH: 5V
100
V_OL: 0V
10
20 30 40 50 60 70 80 90 100
Duty (%)
Power On Time (t_ON) vs. R_T Resistance Characteristics
1000
Ta = 25°C, V_CC = 0 → 12V, Rf = 180kΩ,
Cf = 3300pF, C_RES = 1500pF
500
C_R = 0.47µF
100
50
C_R = 0.1µF
10
C_R = 0.033µF
5
1
10
50
100
500 1000
R_T Resistance (kΩ)
Rev.3.00 Jun 15, 2005 page 17 of 22