HA16129FPJ Datasheet, PDF (3/23 Pages) Hitachi Semiconductor – Single Watchdog Timer

HA16129FPJ
Block Diagram
V_CC
CS
CONT
11
12
13
V_OUT
14
To microprocessor
(or other device)
power supply
connections
71k
STBYadj
19
31.2k
1.5V
36.8k
3.3k
−
+
To Vout
STBY detection
block
15
NMIsns
2k
3.3k
NMIadj
70k
16
80k _−
+
1.18V
25k
R_T
6
NMI detection
block
150mV
+−
1.24V
Voadj
9
Current
limiter
block
Regulator block
S STBY
Q R RES
t_ON detection
block
SQ
−
+
R
OUTE
block
Overvoltage
detection
block
STBY
20
17
NMI
3.3k
10
OUTE
5
C_R
QS
R NMI
If*16
If/6
Cf
3
1
P-RUN
−
+
−
−
+
WDT block
2V
I_R
19k
8.4k ₊
33k
−
20k
I_R*4/3
RES block
I_R
If
8
GND
4
R_R
2
Rf
3.3k
18
RES
C_RES
7
Delay circuit block
Note: The current, voltage, and resistor values listed in the diagram are reference values.
: Connect to Vout
Rev.3.00 Jun 15, 2005 page 3 of 22