AUK S72N23SF

우7
S72NxxSF
Semiconductor
Standard Voltage Detector
Description
The function of this low reset Type IC is to accurately reset systems after detecting the supply voltage at the time
of switching power on and instantaneous power off in various CPU and other logic system. Further, this IC, with
its super low consumption current is most suited as a voltage check circuit for a number of products which use
batteries.
Features
• Super low current consumption (ICCL = 1.0uA Typ.)
• High current of output transistor (IOL=20mA Typ.)
• Hysteresis circuit built in (△VS=100mV Typ.)
• It has on delay function to supplement the constant of outer C and R.
Applications
• Reset circuits for microcomputers, CPU and MPU.
• Reset circuit for logic circuitry.
• Battery voltage check circuit.
• Circuit for changing over to backup battery.
• Level detecting circuit.
Ordering Information
Type NO.
Marking
Package Code
S72NxxSF
N□□
SOT-23F
□□: Detecting Voltage Code
Outline Dimensions
Unit : mm
2.4±0.1
1.6±0.1
KSI-2055-000
0.9±0.1
0.15±0.05
2
0.4±0.05
3
0~0.1
2.9±0.1
1.90 BSC
1
PIN Connections
1. OUT
2. GND
3. Vcc
1
S72NxxSF
Equivalent Circuit Diagram
Vcc
OUT
GND
Maximum ratings
Characteristic
(Ta=25°C)
Unit
Symbol
Ratings
Supply voltage
Vcc
-0.3 ~ +10
V
Power Dissipation (Package Limitation)
PD *
300
mW
Operating Temperature
Topr
-20 ~ +75
℃
Storage Temperature
Tstg
-40 ~ +125
℃
* With PCB(8×8 ㎜ Copper Area) at Glass Epoxy Board (t=1.7 ㎜, Area; 20×20 ㎜)
Electrical Characteristics
(Vcc=5V, Ta=25°C)
Symbol
Test
Circuit
Detecting Voltage
VS
1
Hysteresis Voltage
ΔVS
1
RL=470Ω,VCC=L→H→L
VS/ΔT
1
Low Level Output voltage
VOL
Circuit current at ON
Typ.
Max.
Unit
40
100
300
mV
RL=470Ω, Ta= -20~75℃
-
±0.01
-
%/℃
1
RL=470Ω, VCC= VS Min
-
0.1
0.4
V
ICCL
1
RL=∞Ω, VCC= VS Min
-
100
180
µA
Circuit current at OFF
ICCH
1
RL=∞Ω,VCC=VS Max +0.1V
-
1.0
2.5
µA
Threshold Operating Voltage
Vopr
1
RL=4.7 ㏀, VOL≤0.4V
-
1.4
1.6
V
Output Current at ON I
IOL 1
1
RL=0Ω, VCC= VS Min
10
20
-
mA
Output Current at ON II
IOL 2
1
RL=0Ω, VCC= VS Min ,
Ta= -20~75℃
5
-
-
mA
L→H Transmission delay time
tPLH
2
RL=4.7 ㏀, CL=100 ㎊
-
100
500
㎲
H→L Transmission delay time
tPHL
2
RL=4.7 ㏀, CL=100 ㎊
-
10
20
㎲
Characteristic
Temperature Coefficient
Of detecting voltage
Test Condition
Min.
* See Table 1
KSI-2055-000
2
S72NxxSF
* Table 1
Electrical Characteristics
Characteristic
Detecting voltage
(Vcc=5V, Ta=25°C)
Symbol
VS
Test
Circuit
1
Test Condition
RL=470Ω
VCC=H→L
VOL≤0.4V
KSI-2055-000
Min.
Typ.
Max.
S72N45SF
4.30
4.5
4.70
S72N42SF
4.00
4.2
4.40
S72N39SF
3.70
3.9
4.10
S72N36SF
3.40
3.6
3.80
S72N33SF
3.10
3.3
3.50
S72N31SF
2.90
3.1
3.30
S72N29SF
2.75
2.9
3.05
S72N27SF
2.55
2.7
2.85
S72N25SF
2.35
2.5
2.65
S72N23SF
2.15
2.3
2.45
Unit
V
3
S72NxxSF
Test Circuit 1
Test Circuit 2
Application Circuit
(1) Battery Low Indicator
(2) CPU Resetting
(Note)
(1) Connecting of LED and R2 obtains a voltage drop indicator.
(2) Connecting of C1 and selection of time constant with C1 and R1 set the power on delay time.
KSI-2055-000
4
S72NxxSF
Electrical Characteristic Curves
Fig. 2 ICC – VCC
Fig. 1 VO – VCC
Fig. 3 △VS – Ta
Fig. 4 VS – Ta
Fig. 5 ICCL – Ta
Fig. 6 VOL – Ta
KSI-2055-000
5
S72NxxSF
Fig. 8 ICCH – Ta
Fig. 7 IOL – Ta
Fig. 9 CL – tPLH
KSI-2055-000
6
S72NxxSF
These AUK products are intended for usage in general electronic equipments(Office and
communication equipment, measuring equipment, domestic electrification, etc.).
Please make sure that you consult with us before you use these AUK products in equipments which require high quality and/or reliability, and in equipments which could have
major impact to the welfare of human life(atomic energy control, airplane, spaceship, traffic
signal, combustion central, all types of safety device, etc.).
AUK cannot accept liability to any damage which may occur in case these AUK products
were used in the mentioned equipments without prior consultation with AUK.
KSI-2055-000
7