KSD-I0C002-000 1
S71xxN
Standard Voltage Detector
7
Description
• The S71xx prevents the error of system from supply voltage below normal voltage level at the time the power on
and instantaneous power off in systems.
Features
• Super low current consumption
• High current of output transistor
• Hysteresis Voltage is Provided
Applications
• As Control Circuit of Battery-Backed Memory
• As Measure Against Erroneous Operations at Power On-Off
• As Resetting Function for the CPU-Mounted Equipment --- PC, Printer, VTR, Fax, C-TV etc.
• As Measure Against System Runaway at Instantaneous Break of Power Supply etc.
Ordering Information
Type NO. Marking Package Code
S71xxN S71□□ TO-92N
□□: Detecting Voltage Code
Outline Dimensions Unit : mm
S
Se
em
mi
ic
co
on
nd
du
uc
ct
to
or
r
PIN Connections
1. Vcc
2. GND
3. OUT
3.09~3.29
0.40 Max.
1.27 Typ.
4.20~4.40
0.52 Max.
2.25 Max.
13.50~14.50
4.20~4.40
2.14 Typ.
0.90 Max.
3.55 Typ
23
1
KSD-I0C002-000 2
S71xxN
Equivalent Circuit Diagram
Maximum ratings (Ta=25°C)
Characteristic Symbol Ratings Unit
Supply Voltage VCC -0.3 ~ +10 V
Power Dissipation PD 500 mW
Output Voltage VOUT -0.3 ~ +10 V
Operating Temperature Range TOPR -30 ~ +75 ℃
Storage Temperature Range TSTG -55 ~ +150 ℃
Electrical Characteristics (VCC=5V, Ta=25°C)
Characteristic Symbol
Test
Circuit Test Condition Min. Typ. Max. Unit
Detecting Voltage VS 1 * See Table 1
Hysteresis Voltage ΔVS 1 RL=200Ω, VCC = L→H→L - - 0.4 V
Temperature Coefficient
of Detecting Voltage VS/ΔT 1 RL =200Ω, Ta= -30~75℃ - ±0.01 - %/℃
Low Level Output voltage VOL 1
RL =200Ω, VCC = VS Min - 0.1 0.4 V
Leakage Current When OFF ILEAK 1
VCC=10V, RL=200Ω - - 0.1
µA
Circuit current at ON ICCL 1 VCC = VS Min - - 500 µA
Circuit current at OFF ICCH 1 VCC = VS Max +0.1V - - 50 µA
Operating Voltage VOPR 1
RL =200Ω, VOL≤0.4V - 0.8 1.6 V
Output Current at ON I IOL I 1
RL =0Ω, VCC = VS Min 10 20 - mA
Output Current at ON II IOL II 1
RL =0Ω, VCC = VS Min,
Ta= -30~75℃ 8 - - mA
L→H Transmission delay time tPLH 2
RL =1.0 ㏀, CL=100 ㎊ - 15 - ㎲
H→L Transmission delay time tPHL 2
RL =1.0 ㏀, CL=100 ㎊ - 10 - ㎲
VS : Standard Detection Voltage
KSD-I0C002-000 3
S71xxN
* Table 1
Electrical Characteristics (VCC=5V, Ta=25°C)
Characteristic Symbol
Test
Circuit Test Condition Min. Typ. Max. Unit
S7145N 4.35 4.5 4.65
S7142N 4.05 4.2 4.35
S7139N 3.75 3.9 4.05
S7136N 3.45 3.6 3.75
S7133N 3.15 3.3 3.45
S7131N 2.95 3.1 3.25
S7129N 2.75 2.9 3.05
S7127N 2.55 2.7 2.85
S7125N 2.35 2.5 2.65
S7123N 2.15 2.3 2.45
Detecting voltage VS 1
RL=200Ω
VCC=H→L
VOL≤0.4V
S7121N 1.95 2.1 2.25
V
KSD-I0C002-000 4
S71xxF
(1) Battery Low Indicator
Test Circuit 2
Application Circuit
Test Circuit 1
(2) Resetting for CPU
Note 1. : Connecting of LED and R2 obtains a voltage drop indicator.
KSD-I0C002-000 5
S71xxN
Electrical Characteristic Curves
△
Fig. 3 VS – Ta Fig. 4 VOL – Ta
Fig. 2 △VS – Ta
Fig. 1 VO – VCC
Fig. 5 IOL – Ta
KSD-I0C002-000 6
S71xxN
The AUK Corp. products are intended for the use as components in general electronic
equipment (Office and communication equipment, measuring equipment, home
appliance, etc.).
Please make sure that you consult with us before you use these AUK Corp. 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, transportation, combustion control, all types of safety device, etc.). AUK
Corp. cannot accept liability to any damage which may occur in case these AUK Corp.
products were used in the mentioned equipments without prior consultation with AUK
Corp..
Specifications mentioned in this publication are subject to change without notice.
