NJU7708/09
VOLTAGE DETECTOR with Delay Function
GENERAL DESCRIPTION
The NJU7708/09 is a low quiescent current voltage detector with
delay function featuring high precision detection voltage.
The detection voltage is internally fixed with an accuracy of 1.0%.
The NJU7708/09 are useful for preventing malfunction of
microcomputer or DSP etc. through detect a drop in voltage of
battery or power supply.
The delay function achieves set wait time when supply voltage is
unstable. Moreover, the delay function can make a sequence that
other devices in application work and stabilize before microcomputer
or DSP works.
Delay time can be set by logical combination from 4-delay time.
NJU7708 is Nch. Open Drain and NJU7709 is a C-MOS output
type.
Small packaging makes NJU7708 and NJU7709 suitable for
space conscious applications.
FEATURES
High Precision detection Voltage
Low Quiescent Current
Detection Voltage Range
Delay Time (Built-in Fixed Type)
Output Configuration
CMOS Technology
Package Outline
PIN CONFIGURATION
5
4
PACKAGE OUTLINE
NJU7708/09F
±1.0%
1.3µA
1.3
∼
6.0V(0.1V step)
0ms/50ms/100ms/200ms: Logical selectable 4-delay time
NJU7708: Nch. Open Drain Type
NJU7709: C-MOS Output Type
SOT-23-5
1 2 3
NJU7708/09F
EQUIVALENT CIRCUIT
V
DD
PIN FUNCTION
1. D1
2. V
SS
3. D2
4. V
OUT
5. V
DD
Delay Circuit
Vref
V
OUT
Vref
Delay Circuit
V
OUT
V
SS
D1
D2
D1
D2
NJU7708
NJU7709
Ver.2006-02-23
-1-
NJU7708/09
DETECTION VOLTAGERANK LIST
Device Name
V
DET
NJU7708/09F15
1.5V
NJU7708/09F27
2.7V
NJU7708/09F42
4.2V
NJU7708/09F06
6.0V
LOGICAL TABLE OF DELAY TIME
D1
D2
DELAY
H
H
0ms
H
L
50ms
L
H
100ms
L
L
200ms
NJU7708
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
DD
Output Voltage
V
OUT
Output Current
I
OUT
RATINGS
+10
V
SS
-0.3
∼
+10
50
350(*1)
Power Dissipation
P
D
SOT-23-5
mW
200(*2)
Operating Temperature
Topr
-40
∼
+85
°C
Storage Temperature
Tstg
-40
∼
+125
°C
(*1) : Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers)
(*2) : Device itself
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Detection Voltage
V
DET
Hysterisis Voltage
V
HYS
Quiescent Current
Output Current
Output Leak Current
Detection Voltage
Temperature
Coefficient
I
SS
I
OUT
I
LEAK
∆V
DET
/∆Ta
(Ta=25°C)
MAX. UNIT
+1.0%
V
130
V
1.7
µA
2.2
µA
mA
−
mA
−
0.1
µA
−
ppm/°C
(Ta=25°C)
UNIT
V
V
mA
TEST CONDITION
V
DD
=V
DET
+1V
Nch,V
DS
=0.5V
V
DD
=V
OUT
=9V
Ta=0
∼
+85°C
V
DET
=1.5V
∼
2.5V Version
V
DET
=2.6V
∼
6.0V Version
V
DD
=1.2V
V
DD
=2.4V (
≥
2.7V Version)
MIN.
-1.0%
70
−
−
0.75
4.5
−
−
TYP.
−
90
1.0
1.3
2.0
7.0
−
±100
100
300
µs
50
57.5
ms
Delay Time
td
V
DD
=V
DET
+1V
100
115
ms
200
230
ms
V
D1_H
/ V
D2_H
V
DD
V
−
Delay Time Change
Terminal Input Voltage
V
D1_L
/ V
D2_L
0.3
V
−
9
V
Operating Voltage(*3)
V
DD
R
L
=100kΩ
−
(*3): The minimum operating voltage(V
OPL
) indicates the same value of the input voltage(V
DD
) on condition that V
OUT
becomes 10% or less of the input voltage(V
DD
).
D1=H, D2=H
D1=H, D2=L
D1=L, D2=H
D1=L, D2=L
25
42.5
85
170
1.5
0
0.7
-2-
Ver.2006-02-23
NJU7708/09
TEST CIRCUIT
Quiescent Current TEST CIRCUIT
Detection Voltage
/Minimum Operating Voltage TEST CIRCUIT
I
SS
A
V
DD
V
DET
/
V
OPL
V
OUT
V
DD
D2
D1
V
V
DD
R
L
V
OUT
V
D2
V
OUT
NJM7708
D1
NJM7708
V
SS
V
SS
Leak Current/Output Current TEST CIRCUIT
Delay Time=0mS TEST CIRCUIT
Oscilloscope
I
OUT
/
I
LEAK
V
DD
V
DD
D1
V
OUT
A
V
DD
V
DD
V
OUT
R
L
ch1
ch2
NJM7708
D2
V
OUT
/
V
DS
NJM7708
D1
D2
V
SS
V
SS
Delay Time=50mS TEST CIRCUIT
Oscilloscope
Delay Time=100mS TEST CIRCUIT
Oscilloscope
R
L
V
DD
V
DD
V
OUT
ch1
ch2
R
L
V
DD
V
DD
V
OUT
ch1
ch2
NJM7708
D1
D2
NJM7708
D1
D2
V
SS
V
SS
Ver.2006-02-23
-3-
NJU7708/09
TEST CIRCUIT
Delay Time=200mS TEST CIRCUIT
Oscilloscope
R
L
V
DD
V
DD
V
OUT
ch1
ch2
NJM7708
D1
D2
V
SS
TYPICAL APPLICATION
1
Power Supply Voltage Supervisory Circuit
V
DD
R
L
V
DD
V
OUT
NJM7708
D1
D2
Reset Signal
INPUT
Micro-Processor
etc
V
SS
2
Power Supply Voltage Supervisory Circuit
(
Another Power Supply to Micro-Processor
)
V
DD
1
V
DD
2
R
L
V
DD
V
OUT
NJM7708
D1
D2
Reset Signal
INPUT
Micro-Processor
etc
V
SS
-4-
Ver.2006-02-23
NJU7708/09
NJU7709
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
DD
Output Voltage
V
OUT
Output Current
I
OUT
(Ta=25°C)
UNIT
V
V
mA
RATINGS
+10
V
SS
-0.3
∼
V
DD
+0.3
50
350(*4)
Power Dissipation
P
D
SOT-23-5
mW
200(*5)
Operating Temperature
Topr
-40
∼
+85
°C
Storage Temperature
Tstg
-40
∼
+125
°C
(*4) : Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers)
(*5) : Device itself
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Detection Voltage
V
DET
Hysterisis Voltage
V
HYS
Quiescent Current
I
SS
(Ta=25°C)
MAX. UNIT
+1.0%
V
130
V
1.7
µA
2.2
µA
mA
−
mA
−
mA
−
mA
−
mA
−
−
300
57.5
115
230
V
DD
0.3
ppm/°C
µs
ms
ms
ms
V
V
Output Current
I
OUT
MIN.
-1.0%
70
V
DET
=1.5V
∼
1.9V Version
−
V
DD
=V
DET
+1V
V
DET
=2.0V
∼
6.0V Version
−
V
DD
=1.2V
0.75
Nch, V
DS
=0.5V
4.5
V
DD
=2.4V(≥2.7V Version)
2.0
V
DD
=4.8V
(≤3.9V Version)
Pch, V
DS
=0.5V
V
DD
=6.0V(4.0V∼5.6V Version)
2.5
3.0
V
DD
=8.4V (≥5.7V Version)
Ta=0
∼
+85°C
D1=H, D2=H
D1=H, D2=L
D1=L, D2=H
D1=L, D2=L
−
25
42.5
85
170
1.5
0
TEST CONDITION
TYP.
−
90
1.0
1.3
2.0
7.0
3.5
4.0
5.0
±100
100
50
100
200
−
−
Detection Voltage
Temperature
Coefficient
Delay Time
Delay Time Change
Terminal Input
Voltage
∆V
DET
/∆Ta
td
V
D1_H
/ V
D2_H
V
D1_L
/ V
D2_L
V
DD
V
DD
=V
DET
+1V,
0.8
9
V
R
L
=100kΩ
−
(*6): The minimum Operating Voltage(V
OPL
) indicates the same value of the output voltage(V
OUT
) on condition that V
OUT
becomes 10% or less of the input voltage(V
DD
).
Operating Voltage (*6)
Ver.2006-02-23
-5-
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