HA16103FPJ Datasheet, PDF (2/19 Pages) Renesas Technology Corp – Watchdog Timer

HA16103FPJ/FPK
Pin Arrangement
NC
1
20
P-RUN 2
19
Rf
3
18
Cf
4
17
RR
5
16
CR
6
15
GND
7
14
V_Oadj
8
13
VOUT 9
12
NC
10
11
(Top view)
NC
STBY
V_STBYadj
RES
NMI
V_NMIadj
CRES
V_CC
V_CONT
NC
Pin Functions
No.
1
2
3
4
5
6
7
8
Pin Name
NC
P-RUN
Rf
Cf
RR
CR
GND
Voadj
9
VOUT
10
NC
11
NC
12
VCONT
13
VCC
14
CRES
15
VNMIadj
16
NMI
17
RES
18
VSTBYadj
19
STBY
20
NC
Description
NC pin
P-RUN signal input pin for watchdog timer
Connect resistor Rf. Frequency bandwidth of the filter circuit depends on Rf
Connect resistor Cf. Frequency bandwidth of the filter circuit depends on Cf
Connect resistor RR. Reset-signal power-on time depends on RR
Connect resistor CR. Reset-signal power-on time depends on CR
Ground
5-V reference voltage fine-tuning pin. Connect a resistor between this pin and GND.
The value of output voltage is given by
VOUT = {1 + 5.34/(R1 // 2.0)} × Voadj Unit for R1: kΩ
Connect the collector of an external PNP-type transistor. The pin supplies 5-V
regulated voltage for internal circuit
NC pin
NC pin
The external PNP-type transistor’s base control pin
Supply voltage pin. Operating supply voltage range is 6.0 to 40 V.
If the voltage of VOUT pin declines to less than Detection voltage(1) (because of an
instant power cut or other cause), NMI signals are generated.
If tRES ≈ 0.5•Rf•CRES(sec) has passed since then, RES signals are generated.
If the voltage of VOUT pin inclines to more than Detection voltage(1) (in case of re-
start from LVI state), NMI signals are stop. tr ≈ 0.5•Rf•CRES(sec) has passed since
then, RES signals are stop. Connect capacitor CRES between this pin and GND to
adjust the RES signals delay time(tRES, tr). If delay time is unnecessary, make this pin
open (tRES = 2 µs typ. tr = 10 µs typ. at open)
NMI detection voltage fine-tuning pin. Connect a resistor between this pin and VOUT
pin or GND. The value of output voltage is given by
VNMI = {1 + (R2 // 25.5)/(R3 // 10.6)} × VNMIadj. Unit for R2, R3: kΩ
NMI signal output pin. Connect to pin NMI of the microcomputer
RES signal output pin. Connect to pin RES of the microcomputer
STBY detection voltage tuning pin. Connect a resistor between this pin and VOUT or
GND. The value of output voltage is given by
VSTBY = 1.89 × {1 + 21/(7.9 + 8.85 // R4)} × VSTBYadj Unit for R4: kΩ
STBY signal output pin. Connect to pin STBY of the microcomputer
NC pin
Rev.3.00 Jun 15, 2005 page 2 of 18