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PDF HA16103 Data sheet ( Hoja de datos )
| Número de pieza | HA16103 | |
| Descripción | Watchdog Timer | |
| Fabricantes | Hitachi Semiconductor | |
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HA16103 FPJ/FPK
Watchdog Timer
Description
The HA16103FPJ/FPK monolithic voltage control is designed for microcomputer systems. In addition to
voltage regulator, it includes watch dog timer function, power on reset function, and output voltage monitor
function.
It is suitable for battery use microcomputer systems.
Functions
• 5 V regulated power supply
• Power on reset pulse generator
• Watch dog timer
• Low voltage inhibit protection
Features
• Wide operational supply voltage range (VCC = 6 to 40 V)
• Various control signals are generated when microcomputer system runaway occurs. (NMI signal and
STBY signal are generated by detecting voltage level, and RES signal is generated by monitoring the
time after NMI signal is detected)
• Regulated voltage, NMI detecting voltage, STBY detecting voltage are adjustable.
• At low voltage and re-start, the delay time of RES signal is adjustable
• Watchdog timer filtering uses the minimum clock input pulse width and maximum cycle detection
method
Ordering Information
Type No.
HA16103FPJ
HA16103FPK
Package
FP-20DA
FP-20DA
1 page  
HA16103 FPJ/FPK
Functional Description
Stabilized Power Supply Function
The stabilized power supply includes the following features:
• Wide range of operating input voltage from 6 V to 40 V to provide stabilized voltages
• Availability of any output current, by simply replacing the external transistor
• Fine adjustment of output voltage
Figure 1 shows the fine adjustment circuit of the output circuit. Select the resistor R1 as shown in
equation 1.
Add a resistor between GND and Voadj to increase the output voltage.
VBATT
Q1
VCC
GND
VCONT VOUT
HA16103
To micro-
R1 C1
computer system
100 µF
Vout
=
(1+
5.34
R1 // 2.0
) × Voadj
⋅
⋅
⋅
⋅
Equation
1
(R1: kΩ)
(Voadj 1.31V)
Figure 1 Fine Adjustment Circuit of Output Voltage
5 I OUT = 0.1 A
0.5 A
4
1A
3
2
1
(Ta = 25°C)
0 5 10
Input voltage VCC (V)
Figure 2 Output Voltage Characteristic
5
5 Page 
HA16103 FPJ/FPK
Electrical Characteristics (Ta = 25°C, VCC = 12 V, VOUT = 5 V) (cont)
Item
Symbol
NMI output NMI pin
“L”-level voltage
VOL1
NMI pin
“H”-level voltage
VOH1
STBY
output
NMI function start
VOUT voltage
STBY pin
“L”-level voltage
VNMI
VOL2
STBY pin
“H”-level voltage
VOH2
RES output
STBY function start VSTBY
VOUT voltage
RES pin
“L”-level voltage
VOL3
RES pin
“H”-level voltage
VOH3
RES function start
VOUT voltage
Power on time
Clock off reset time
Reset pulse
“L”-level time
VRES
t ON
t OFF
t RL
Reset pulse
“H”-level time
t RH
Low Voltage
protecton
Detection voltage(1) VH1
Detection voltage(1) VHYS1
Hysteresis width
Detection voltage(2) VH2
Detection voltage(2) VHYS2
Hysteresis width
Reset
inhibit
pulse
Delay time restart
t RES
tr
Min Typ Max Unit
— — 0.4 V
— VO1 — V
(VO2)
— 0.7 1.4 V
— — 0.4 V
— VO1 — V
(VO2)
— 0.7 1.4 V
— — 0.4 V
— VO1 — V
(VO2)
— 0.7 1.4 V
25 40 60 ms
80 130 190 ms
15 20 30 ms
37 60 90 ms
4.40 4.60 4.80 V
50 100 150 mV
2.9 3.2
1.35 1.5
3.5 V
1.65 V
— 200 — µs
— 200 — µs
Test Condition
IOL1 = 2 mA
IOL2 = 2 mA
IOL3 = 2 mA
Rf = 180 kΩ, RR = 180 kΩ
Cf = 0.01 µF, CR = 0.1 µF
Rf = 180 kΩ, RR = 180 kΩ
Cf = 0.01 µF, CR = 0.1 µF
Rf = 180 kΩ, RR = 180 kΩ
Cf = 0.01 µF, CR = 0.1 µF
CRES = 2200 pF
CRES = 2200 pF
11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet HA16103.PDF ] | |
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