HA16129FPJ Datasheet, PDF (15/23 Pages) Hitachi Semiconductor – Single Watchdog Timer

HA16129FPJ
Test Circuits
• Vout test circuit
V_CC
Icont
A
Units: Resistors Ω
Capacitors F
Vout
STBY ^VCC
NMI
RES
CS
CONT
HA16129FPJ
Vout
STBYadj
NMIsns
f = 1kHz
duty = 50%
Voadj
NMIadj
P-RUN
Rf
Cf
R_R C_R R_T GND C_RES
180k 3300p 180k 0.1µ ^390k
1500p
Here, the Vout voltage is for a V_CC
of 12V, and Icont is monitored as
Vout is varied.
• I_CC test circuit
I_IN
V_CC
STBY ^VCC
NMI
RES
CS
CONT
HA16129FPJ
Vout
STBYadj
NMIsns
f = 1kHz
duty = 50%
Voadj
NMIadj
P-RUN
Rf
Cf
R_R C_R R_T GND C_RES
180k 3300p 180k 0.1µ ^390k
1500p
Iout
Vout
*I_CC = I_IN + Iout
• Test circuit for other parameters
V_CC
STBY ^VCC
NMI
RES
CS
CONT
HA16129FPJ
Vout
STBYadj
NMIsns
Voadj
NMIadj
V
P-RUN
Rf
Cf
R_R C_R R_T GND C_RES
f = 1kHz
duty = 50%
180k 3300p 180k
0.1µ ^390k
1500p
NMI Vout
detection
R1
13k
NMI V_CC
detection
R2
390k
Rev.3.00 Jun 15, 2005 page 15 of 22