S-1000 Series
www.ablicinc.com
ULTRA-SMALL PACKAGE HIGH-PRECISION
VOLTAGE DETECTOR
© ABLIC Inc., 2004-2015 Rev.3.1_02
1
The S-1000 series is a series of high-precision voltage detectors developed using CMOS process. The detection voltage is
fixed internally with an accuracy of 1.0%. It operates with low current consumption of 350 nA typ. Two output forms, Nch
open-drain and CMOS output, are available. CMOS voltage detector, S-1000 Series is the most suitable for the portable
equipments with ultra low current consumption, high precision and corresponding to the small package.
Features
Ultra-low current consumption 350 nA typ. (VDD detection voltage 1.5 V)
High-precision detection voltage 1.0%
Operating voltage range 0.95 to 5.5 V
Hysteresis characteristics 5% typ.
Detection voltage 1.5 to 4.6 V (0.1 V step)
Output form Nch open-drain output (Active “L”)
CMOS output (Active “L”)
Lead-free, Sn 100%, halogen-free*1
*1. Refer to “ Product Name Structure” for details.
Applications
Power monitor for microcomputers and reset for CPUs.
Power monitor for portable equipments such as cellular phones, digital still cameras and PDAs.
Constant voltage power monitor for cameras, video equipments and communication devices.
Packages
SC-82AB
SOT-23-5
SNT-4A
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ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
2
Block Diagrams
1. Nch open-drain output products
VSS
*1
*1
OUT
VDD
V
REF
*1. Parasitic diode
Figure 1
2. CMOS output products
*1
OUT
VSS
VDD
*1
*1
V
REF
*1. Parasitic diode
Figure 2
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
3
Product Name Structure
The detection voltage, output form and packages for S-1000 series can be selected at the user's request. Refer to the “1.
Product name” for the construction of the product name, “2. Package” regarding the package drawings and “3. Product
name list” for the full product names.
1. Product name
1. 1 SC-82AB, SOT-23-5
S-1000 x xx - xxxx x
Package name (abbreviation) and packing specifications*1
N4T1: SC-82AB, tape
M5T1: SOT-23-5, tape
Detection voltage value
15 ~ 46
(e.g. When the detection voltage is 1.5 V, it is expressed as 15.)
Output form
N: Nch open-drain output (Active “L”)
C: CMOS output (Active “L”)
Environmental code
U: Lead-free (Sn 100%), halogen-free
G: Lead-free (for details, please contact our sales office)
*1. Refer to the taping specifications at the end of this book.
1. 2 SNT-4A
S-1000 x xx - I4T1 U
Package name (abbreviation) and packing specifications*1
I4T1: SNT-4A, tape
Detection voltage value
15 ~ 46
(e.g. When the detection voltage is 1.5 V, it is expressed as 15.)
Output form
N: Nch open-drain output (Active “L”)
C: CMOS output (Active “L”)
Environmental code
U: Lead-free (Sn 100%), halogen-free
*1. Refer to the taping specifications at the end of this book.
2. Packages
Package name Drawing code
Package Tape Reel Land
SC-82AB NP004-A-P-SD
NP004-A-C-SD
NP004-A-C-S1 NP004-A-R-SD
SOT-23-5 MP005-A-P-SD MP005-A-C-SD MP005-A-R-SD
SNT-4A PF004-A-P-SD PF004-A-C-SD PF004-A-R-SD PF004-A-L-SD
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
4
3. Product name list
3. 1 Nch open-drain output products
Table 1
Detection voltage range
SC-82AB SOT-23-5 SNT-4A
1.5 V 1.0% S-1000N15-N4T1x S-1000N15-M5T1x S-1000N15-I4T1U
1.6 V 1.0% S-1000N16-N4T1x S-1000N16-M5T1x S-1000N16-I4T1U
1.7 V 1.0% S-1000N17-N4T1x S-1000N17-M5T1x S-1000N17-I4T1U
1.8 V 1.0% S-1000N18-N4T1x S-1000N18-M5T1x S-1000N18-I4T1U
1.9 V 1.0% S-1000N19-N4T1x S-1000N19-M5T1x S-1000N19-I4T1U
2.0 V 1.0% S-1000N20-N4T1x S-1000N20-M5T1x S-1000N20-I4T1U
2.1 V 1.0% S-1000N21-N4T1x S-1000N21-M5T1x S-1000N21-I4T1U
2.2 V 1.0% S-1000N22-N4T1x S-1000N22-M5T1x S-1000N22-I4T1U
2.3 V 1.0% S-1000N23-N4T1x S-1000N23-M5T1x S-1000N23-I4T1U
2.4 V 1.0% S-1000N24-N4T1x S-1000N24-M5T1x S-1000N24-I4T1U
2.5 V 1.0% S-1000N25-N4T1x S-1000N25-M5T1x S-1000N25-I4T1U
2.6 V 1.0% S-1000N26-N4T1x S-1000N26-M5T1x S-1000N26-I4T1U
2.7 V 1.0% S-1000N27-N4T1x S-1000N27-M5T1x S-1000N27-I4T1U
2.8 V 1.0% S-1000N28-N4T1x S-1000N28-M5T1x S-1000N28-I4T1U
2.9 V 1.0% S-1000N29-N4T1x S-1000N29-M5T1x S-1000N29-I4T1U
3.0 V 1.0% S-1000N30-N4T1x S-1000N30-M5T1x S-1000N30-I4T1U
3.1 V 1.0% S-1000N31-N4T1x S-1000N31-M5T1x S-1000N31-I4T1U
3.2 V 1.0% S-1000N32-N4T1x S-1000N32-M5T1x S-1000N32-I4T1U
3.3 V 1.0% S-1000N33-N4T1x S-1000N33-M5T1x S-1000N33-I4T1U
3.4 V 1.0% S-1000N34-N4T1x S-1000N34-M5T1x S-1000N34-I4T1U
3.5 V 1.0% S-1000N35-N4T1x S-1000N35-M5T1x S-1000N35-I4T1U
3.6 V 1.0% S-1000N36-N4T1x S-1000N36-M5T1x S-1000N36-I4T1U
3.7 V 1.0% S-1000N37-N4T1x S-1000N37-M5T1x S-1000N37-I4T1U
3.8 V 1.0% S-1000N38-N4T1x S-1000N38-M5T1x S-1000N38-I4T1U
3.9 V 1.0% S-1000N39-N4T1x S-1000N39-M5T1x S-1000N39-I4T1U
4.0 V 1.0% S-1000N40-N4T1x S-1000N40-M5T1x S-1000N40-I4T1U
4.1 V 1.0% S-1000N41-N4T1x S-1000N41-M5T1x S-1000N41-I4T1U
4.2 V 1.0% S-1000N42-N4T1x S-1000N42-M5T1x S-1000N42-I4T1U
4.3 V 1.0% S-1000N43-N4T1x S-1000N43-M5T1x S-1000N43-I4T1U
4.4 V 1.0% S-1000N44-N4T1x S-1000N44-M5T1x S-1000N44-I4T1U
4.5 V 1.0% S-1000N45-N4T1x S-1000N45-M5T1x S-1000N45-I4T1U
4.6 V 1.0% S-1000N46-N4T1x S-1000N46-M5T1x S-1000N46-I4T1U
Remark 1. x: G or U
2. Please select products of environmental code = U for Sn 100%, halogen-free products.
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
5
3. 2 CMOS output products
Table 2
Detection voltage range
SC-82AB SOT-23-5 SNT-4A
1.5 V 1.0% S-1000C15-N4T1x S-1000C15-M5T1x S-1000C15-I4T1U
1.6 V 1.0% S-1000C16-N4T1x S-1000C16-M5T1x S-1000C16-I4T1U
1.7 V 1.0% S-1000C17-N4T1x S-1000C17-M5T1x S-1000C17-I4T1U
1.8 V 1.0% S-1000C18-N4T1x S-1000C18-M5T1x S-1000C18-I4T1U
1.9 V 1.0% S-1000C19-N4T1x S-1000C19-M5T1x S-1000C19-I4T1U
2.0 V 1.0% S-1000C20-N4T1x S-1000C20-M5T1x S-1000C20-I4T1U
2.1 V 1.0% S-1000C21-N4T1x S-1000C21-M5T1x S-1000C21-I4T1U
2.2 V 1.0% S-1000C22-N4T1x S-1000C22-M5T1x S-1000C22-I4T1U
2.3 V 1.0% S-1000C23-N4T1x S-1000C23-M5T1x S-1000C23-I4T1U
2.4 V 1.0% S-1000C24-N4T1x S-1000C24-M5T1x S-1000C24-I4T1U
2.5 V 1.0% S-1000C25-N4T1x S-1000C25-M5T1x S-1000C25-I4T1U
2.6 V 1.0% S-1000C26-N4T1x S-1000C26-M5T1x S-1000C26-I4T1U
2.7 V 1.0% S-1000C27-N4T1x S-1000C27-M5T1x S-1000C27-I4T1U
2.8 V 1.0% S-1000C28-N4T1x S-1000C28-M5T1x S-1000C28-I4T1U
2.9 V 1.0% S-1000C29-N4T1x S-1000C29-M5T1x S-1000C29-I4T1U
3.0 V 1.0% S-1000C30-N4T1x S-1000C30-M5T1x S-1000C30-I4T1U
3.1 V 1.0% S-1000C31-N4T1x S-1000C31-M5T1x S-1000C31-I4T1U
3.2 V 1.0% S-1000C32-N4T1x S-1000C32-M5T1x S-1000C32-I4T1U
3.3 V 1.0% S-1000C33-N4T1x S-1000C33-M5T1x S-1000C33-I4T1U
3.4 V 1.0% S-1000C34-N4T1x S-1000C34-M5T1x S-1000C34-I4T1U
3.5 V 1.0% S-1000C35-N4T1x S-1000C35-M5T1x S-1000C35-I4T1U
3.6 V 1.0% S-1000C36-N4T1x S-1000C36-M5T1x S-1000C36-I4T1U
3.7 V 1.0% S-1000C37-N4T1x S-1000C37-M5T1x S-1000C37-I4T1U
3.8 V 1.0% S-1000C38-N4T1x S-1000C38-M5T1x S-1000C38-I4T1U
3.9 V 1.0% S-1000C39-N4T1x S-1000C39-M5T1x S-1000C39-I4T1U
4.0 V 1.0% S-1000C40-N4T1x S-1000C40-M5T1x S-1000C40-I4T1U
4.1 V 1.0% S-1000C41-N4T1x S-1000C41-M5T1x S-1000C41-I4T1U
4.2 V 1.0% S-1000C42-N4T1x S-1000C42-M5T1x S-1000C42-I4T1U
4.3 V 1.0% S-1000C43-N4T1x S-1000C43-M5T1x S-1000C43-I4T1U
4.4 V 1.0% S-1000C44-N4T1x S-1000C44-M5T1x S-1000C44-I4T1U
4.5 V 1.0% S-1000C45-N4T1x S-1000C45-M5T1x S-1000C45-I4T1U
4.6 V 1.0% S-1000C46-N4T1x S-1000C46-M5T1x S-1000C46-I4T1U
Remark 1. x: G or U
2. Please select products of environmental code = U for Sn 100%, halogen-free products.
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
6
Output Forms
1. Output forms in S-1000 series
Table 3
Nch open-drain output products
(Active “L”)
CMOS output products
(Active “L”)
S-1000 series “N” is the last letter of the product name.
e.g. S-1000N
“C” is the last letter of the product name.
e.g. S-1000C
2. Output form and their usage
Table 4
Usage Nch open-drain output products
(Active “L”)
CMOS output products
(Active “L”)
Different power supplies Yes No
Active “L” reset for CPUs Yes Yes
Active “H” reset for CPUs No No
Detection voltage change by resistor divider Yes No
Example for two power supplies
Example for one power supply
V / D
Nch
V / D
Nch
V / D
CMOS
CPU CPU CPU
VDD1 V
DD2 V
DD V
DD
OUT OUT OUT
VSS VSS VSS
Figure 3
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
7
Pin Configurations
4 3
1 2
SC-82AB
Top view
Table 5
Pin No. Pin name Pin description
1 OUT Voltage detection output pin
2 VDD Voltage input pin
3 NC*1 No connection
4 VSS GND pin
*
1. The NC pin is electrically open.
The NC pin can be connected to VDD or VSS.
Figure 4
SOT-23-5
Top view
5 4
3 2 1
Table 6
Pin No. Pin name Pin description
1 OUT Voltage detection output pin
2 VDD Voltage input pin
3 VSS GND pin
4 NC*1 No connection
5 NC*1 No connection
*
1. The NC pin is electrically open.
The NC pin can be connected to VDD or VSS.
Figure 5
SNT-4A
Top view
1 4
2 3
Table 7
Pin No. Pin name Pin description
1 OUT Voltage detection output pin
2 VSS GND pin
3 NC*1 No connection
4 VDD Voltage input pin
*
1. The NC pin is electrically open.
The NC pin can be connected to VDD or VSS.
Figure 6
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
8
Absolute Maximum Ratings
Table 8
(Ta 25 C unless otherwise specified)
Item Symbol Absolute maximum ratings Unit
Power supply voltage VDD VSS 6 V
Output voltage Nch open-drain output products VOUT VSS 0.3 to VSS 6 V
CMOS output products VSS 0.3 to VDD 0.3 V
Output current IOUT 50 mA
Power dissipation
SC-82AB
PD
200 (When not mounted on board) mW
350*1 mW
SOT-23-5 300 (When not mounted on board) mW
600*1 mW
SNT-4A 300*1 mW
Operating ambient temperature Topr 40 to 85 C
Storage temperature Tstg 40 to 125 C
*1. When mounted on board
[Mounted board]
(1) Board size: 114.3 mm 76.2 mm t1.6 mm
(2) Board name: JEDEC STANDARD51-7
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
0 50 100 150
600
400
0
Power Dissi
p
ation
(
PD
)
[
mW
]
Ambient Tem
p
erature
(
Ta
)
[
C
]
200
100
300
500
700
S
C
-82AB
SNT-4
A
SOT-23-5
Figure 7 Power Dissipation of Package (When Mounted on Board)
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
9
Electrical Characteristics
1. Nch open-drain output products
Table 9
(Ta 25 C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Measure-
ment
circuit
Detection voltage*1 VDET VDET(S)
0.99
VDET(S)
VDET(S)
1.01 V 1
Hysteresis width VHYS VDET
0.03
VDET
0.05
VDET
0.07 V 1
Current consumption ISS VDD VDET
S
1.5 V S-1000N15 to 39 350 900 nA 2
VDD 5.5 V S-1000N40 to 46 350 900 nA 2
Operating voltage VDD 0.95 5.5 V 1
Output current IOUT Output transistor,
Nch, VDS 0.5 V, VDD 1.2 V 1.36 2.55 mA 3
Leakage current ILEAK Output transistor,
Nch, VDS 5.5 V, VDD 5.5 V 100 nA 3
Response time tPLH 60 s1
Detection voltage
temperature coefficient*2
V
DET
TaV
DET
Ta 40 to 85 C 100 350 ppm /
C1
*1. VDET: Actual detection voltage value, VDET(S): Specified detection voltage value (The center value of the detection voltage
range in Table 1.)
*2. The temperature change ratio in the detection voltage [mV / °C] is calculated by using the following equation.




1000C/ppm
VTa
V
VTyp.VC/mV
Ta
V
DET
DET
DET(S)
DET
*3
*2
*1
*1. Temperature change ratio of the detection voltage
*2. Specified detection voltage
*3. Detection voltage temperature coefficient
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
10
2. CMOS output products
Table 10
(Ta 25 C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Measure
-
ment
circuit
Detection voltage*1 VDET VDET(S)
0.99
VDET(S)
VDET(S)
1.01 V 1
Hysteresis width VHYS VDET
0.03
VDET
0.05
VDET
0.07 V 1
Current consumption ISS VDD VDET
S
1.5 V S-1000C15 to 39 350 900 nA 2
VDD 5.5 V S-1000C40 to 46 350 900 nA 2
Operating voltage VDD 0.95 5.5 V 1
Output current IOUT
Output transistor,
Nch, VDS 0.5 V, VDD 1.2 V 1.36 2.55 mA 3
Output transistor,
Pch, VDS 0.5 V, VDD 5.5 V 1.71 2.76 mA 4
Response time tPLH 60 s 1
Detection voltage
temperature coefficient*2
V
DET
TaV
DET
Ta 40 to 85 C 100 350 ppm/
C 1
*1. VDET: Actual detection voltage value, VDET(S): Specified detection voltage value (The center value of the detection voltage
range in Table 2.)
*2. The temperature change ratio in the detection voltage [mV / °C] is calculated by using the following equation.




1000C/ppm
VTa
V
VTyp.VC/mV
Ta
V
DET
DET
DET(S)
DET
*3
*2
*1
*1. Temperature change ratio of the detection voltage
*2. Specified detection voltage
*3. Detection voltage temperature coefficient
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
11
Measurement Circuits
1.
S-1000
Series
V
VDD
VDD
VSS
OUT
V
R*1
100 k
1. R is unnecessary for CMOS output products.
Figure 8
2.
S-1000
Series
A
VDD
VDD
VSS
OUT
Figure 9
3.
S-1000
Series
V
VDS
VDD
VDD
VSS
OUT
V A
Figure 10
4.
S-1000
Series
V
VDD
VDS
VDD
VSS
OUT
V A
Figure 11
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
12
Timing Chart
1. Nch open-drain output products
V
OUT
VDD
VSS
R
100 k
Release voltage (VDET)
Detection voltage (VDET)
VDD
VSS
Minimum operating voltage
Output from the OUT pin
Hysteresis width (VHYS)
VDD
VSS
Figure 12
2. CMOS output products
V
OUT
VDD
VSS
Release voltage (VDET)
Detection voltage (VDET)
VDD
VSS
Minimum operating voltage
Hysteresis width (VHYS)
Output from the OUT pin
VSS
VDD
Remark For values of VDD less than minimum operating voltage, values of OUT terminal output is free in the shaded region.
Figure 13
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
13
Operation
1. Basic operation: CMOS output (Active “L”)
(1) When the power supply voltage (VDD) is higher than the release voltage (VDET), the Nch transistor is OFF and the
Pch transistor is ON to provide VDD (“H”) at the output. Since the Nch transistor N1 in Figure 14 is OFF, the
comparator input voltage is
CBA
DDCB
RRR
V)RR(
.
(2) When the VDD goes below VDET, the output provides the VDD level, as long as the VDD remains above the detection
voltage VDET. When the VDD falls below VDET (point A in Figure 15), the Nch transistor becomes ON, the Pch
transistor becomes OFF, and the VSS level appears at the output. At this time the Nch transistor N1 in Figure 14
becomes ON, the comparator input voltage is changed to
BA
DDB
RR
VR
.
(3) When the VDD falls below the minimum operating voltage, the output becomes undefined, or goes to the VDD when the
output is pulled up to the VDD.
(4) The VSS level appears when the VDD rises above the minimum operating voltage. The VSS level still appears even
when the VDD surpasses VDET, as long as it does not exceed the release voltage VDET.
(5) When the VDD rises above VDET (point B in Figure 15), the Nch transistor becomes OFF and the Pch transistor
becomes ON to provide VDD level at the output.
V
REF
Pch
Nch
N1
R
C
R
B
R
A
OUT
VSS
VDD
*1
*1
*1
*1. Parasiteic diode
Figure 14 Operation 1
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
14
Hysteresis width (V
HYS
)
A
B
V
DD
V
SS
Minimum operating voltage
Output from the OUT pin
V
DD
V
SS
(1) (2) (3) (5) (4)
Release voltage (V
DET
)
Detection voltage (V
DET
)
Figure 15 Operation 2
2. Other characteristics
2. 1 Temperature characteristics of detection voltage
The shaded area in Figure 16 shows the temperature characteristics of the detection voltage.
40 25
0.945 mV/C
VDET [V]
85 Ta [C]
0.945 mV/C
VDET25
*1
*1.VDET25 is an actual detection voltage value at 25°C.
Figure 16 Temperature characteristics of detection voltage (Example for VDET 2.7 V)
2. 2 Temperature characteristics of release voltage
The temperature change Ta
VDET
of the release voltage is calculated by the temperature change Ta
VDET
of the
detection voltage as follows:
Ta
V
V
V
Ta
VDET
DET
DETDET
The temperature changes of the release voltage and the detection voltage have the same sign consequently.
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
15
2. 3 Temperature characteristics of hysteresis voltage
The temperature changes of the hysteresis voltage is expressed as Ta
V
Ta
VDETDET
and is calculated as
follows:
Ta
V
V
V
Ta
V
Ta
VDET
DET
HYSDETDET
Standard Circuit
VDD
OUT
VSS
R*1
100 k
*1. R is unnecessary for CMOS output products.
Figure 17
Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
evaluation using the actual application to set the constants.
Explanation of Terms
1. Detection voltage (VDET), release voltage (VDET)
The detection voltage (VDET) is a voltage at which the output turns to “L”. The detection voltage varies slightly among
products of the same specification. The variation of detection voltage between the specified minimum (VDET) Min. and the
maximum (VDET) Max. is called the detection voltage range (Refer to Figure 18).
Example: For the S-1000C15, the detection voltage lies in the range of 1.485 (VDET) 1.515.
This means that some S-1000C15s have 1.485 V for VDET and some have 1.515 V.
The release voltage is a voltage at which the output turns to “H”. The release voltage varies slightly among products of
the same specification. The variation of release voltages between the specified minimum (VDET) Min. and the maximum
(VDET) Max. is called the release voltage range (Refer to Figure 19). The range is calculed from the actual detection
voltage (VDET) of a product and is expressed by VDET 1.03 VDET VDET 1.07.
Example: For the S-1000C15, the release voltage lies in the range of 1.530 (VDET) 1.621.
This means that some S-1000C15s have 1.530 V for VDET and some have 1.621 V.
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
16
Detection voltage range
Detection voltage
V
DD
(V
DET
) Min.
(V
DET
) Max.
OUT
Release voltage
Release voltage range
V
DD
(V
DET
) Min.
(V
DET
) Max.
OUT
Figure 18 Detection voltage (CMOS output products) Figure 19 Release voltage (CMOS output products)
2. Hysteresis width (VHYS)
The hysteresis width is the voltage difference between the detection voltage and the release voltage (The voltage at point
B The voltage at point A VHYS in Figure 15). The existence of the hysteresis width prevents malfunction caused by
noise on input signal.
3. Through-type current
The through-type current refers to the current that flows instantaneously at the time of detection and release of a voltage
detector. The through-type current is large in CMOS output products, small in Nch open-drain output products.
4. Oscillation
In applications where a resistor is connected to the voltage detector input (Figure 20), taking a CMOS active “L” product
for example, the through-type current which is generated when the output goes from “L” to “H” (release) causes a voltage
drop equal to [through-type current] [input resistance] across the resistor. When the input voltage drops below the
detection voltage (VDET) as a result, the output voltage goes to low level. In this state, the through-type current stops
and its resultant voltage drop disappears, and the output goes from “L” to “H”. The through-type current is then
generated again, a voltage drop appears, and repeating the process finally induces oscillation.
OUT
VSS
VDD
R
B
R
A
V
IN
S-1000C
Figure 20 An example for bad implementation of input voltage divider
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
17
Precautions
If the input impedance is high, oscillation may occur due to the through-type current etc. In COMS output products,
impedance should not be connected to the input pin. In Nch open drain output products, input impedance is
recommended to be 800 or less. However be sure to perform sufficient evaluation under the actual usage conditions for
selection, including evaluation of temperature characteristics.
In CMOS output products oscillation may occur when a pull-down resistor is used, and falling speed of the power supply
voltage (VDD) is slow near the detection voltage.
When designing for mass production using an application circuit described herein, the product deviation and temperature
characteristics should be taken into consideration. ABLIC Inc. shall not bear any responsibility for the products on the
circuits described herein.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
ABLIC Inc. claims no responsibility for any and all disputes arising out of or in connection with any infringement of the
products including this IC upon patents owned by a third party.
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
18
Typical Characteristics (Typical Data)
1. Detection voltage (VDET) temperature (Ta)
-40 -20 0 20 40 60 80
1.59
V
DET
[V]
1.58
1.57
1.56
1.55
1.54
1.53
1.52
1.50
1.49
S-1000C15
Ta [
°C
]
+VDET
-VDET
-40 -20 020406080
4.85
4.80
4.75
4.70
4.65
4.60
4.55
4.50
4.45
4.40
VDET [V]
S-1000C46
Ta [
°C
]
-V
DET
+V
DET
2. Hysteresis voltage width (VHYS) - temperature (Ta)
-40 -20 0 20 40 60 80
8.0
7.0
6.0
5.0
4.0
3.0
V
HYS
[%]
S-1000C15
Ta [
°C
]
-40 -20 0 20 40 60 80
8.0
7.0
6.0
5.0
4.0
3.0
VHYS [%]
S-1000C46
Ta [
°C
]
3. Current consumption (ISS) input voltage (VDD)
0 2.01.0 3.0
4.0 5.0 6.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
I
SS
[μA]
S-1000C15
V
DD
[V]
Ta = 25
°C
0 2.0
1.0 3.0 4.0 5.0 6.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
I
SS
[μA]
S-1000C46
V
DD
[V]
Ta = 25
°C
4. Current consumption (ISS) temperature (Ta)
-40 -20 0 20 40 60 80
0.8
0.6
0.4
0.2
0.0
I
SS
[μA]
S-1000C15 V
DD
= 3.0 V
Ta [
°C
]
-40 -20 0 20 40 60 80
0.8
0.6
0.4
0.2
0.0
I
SS
[μA]
S-1000C46 V
DD
= 5.5 V
Ta [
°C
]
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
19
5. Nch transistor output current (IOUT) VDS 6. Pch transistor output current (IOUT) VDS
1.0 2.0 3.0 4.0
I
OUT
[mA]
20.0
15.0
10.0
5.0
0
0
V
DS
[V]
Ta = 25
°C
S-1000C46 / S-1000N46
V
DD
= 3.6 V
V
DD
= 2.4 V
V
DD
= 1.2 V
V
DD
= 1.0 V
I
OUT
[mA]
20.0
15.0
10.0
5.0
0
0
V
DS
[V]
Ta = 25
°C
S-1000C15
1.0 2.0 3.0 4.0
V
DD
= 4.6 V
V
DD
= 3.6 V
V
DD
= 2.4 V
V
DD
= 1.9 V
7. Nch transistor output current (IOUT) 8. Pch transistor output current (IOUT)
I
OUT
[mA]
8.0
6.0
4.0
2.0
S-1000C46 / S-1000N46
1.0 2.0 3.0 4.0 5.0
V
DD
[V]
V
DS
= 0.5 V
0
0
Ta = -40
°C
Ta = 25
°C
Ta = 85
°C
IOUT [mA]
4.0
3.0
2.0
1.0
0
0
VDD [V]
VDS = 0.5 V
S-1000C15
2.0 4.0 6.0 8.0
Ta = -40
°C
Ta = 25
°C
Ta = 85
°C
9. Minimum operating voltage - input voltage (VDD)
V
OUT
[V]
0.8
0.6
0.4
0.2
0
0
S-1000N15
0.2 0.4 0.6 0.8 1.0
V
DD
[V]
Pull-up to V
DD
Pull-up resistance
: 100 k
Ta = -40
°C
Ta = 25
°C
Ta = 85
°C
VOUT [V]
2.0
2.5
3.0
1.5
1.0
0.5
0
00.5 1.0 1.5 2.0 2.5
V
DD
[V]
Pull-up to 3.0 V
Pull-up resistance
: 100 k
S-1000N15
Ta = -40
°C
Ta = 25
°C
Ta = 85
°C
V
OUT
[V]
0.8
0.6
0.4
0.2
0
00.2 0.4 0.6 0.8 1.0
V
DD
[V]
S-1000N46 Pull-up to V
DD
Pull-up resistance
: 100 k
Ta = -40
°C
Ta = 25
°C
Ta = 85
°C
V
OUT
[V]
6.0
5.0
4.0
3.0
2.0
1.0
0
01.0 2.0 3.0 4.0 5.0
V
DD
[V]
S-1000N46 Pull-up to 5.5 V
Pull-up resistance
: 100 k
Ta = -40
°C
Ta = 25
°C
Ta = 85
°C
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
20
1.0 2.0 2.5
1.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
0.60
V
DDmin
[V]
0.55
0.50
0.45
0.40
0.35
0.30
Pull-up [V]
S-1000N15 Pull-up resistance
: 100 k
Ta = -40
°C
Ta = 25
°C
Ta = 85
°C
VOUT(V)
PULL-UP
PULL-UP
0.1
0 VDD(V)
VDDmin
Remark VDDmin. is defined by the VDD voltage at which VOUT
goes below 10% of pull-up voltage when the VDD
increase from 0 V.
1.0 2.0 2.51.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
0.60
V
DDmin
[V]
0.55
0.50
0.45
0.40
0.35
0.30
Pull-up [V]
Pull-up resistance
: 100 k
S-1000N46
Ta = 85
°C
Ta = 25
°C
Ta = -40
°C
Figure 21
10. Dynamic response - COUT
0.0001 0.001 0.01 0.1
Response time [ms]
Load capacitance [μF]
Ta = 25
°C
S-1000N15 Pull-up to VDD
Pull-up resistance : 100 k
0.00001
0.01
0.001
0.1
1
10
100
tPLH
tPHL
0.00001 0.0001 0.001
0.01
0.001
0.1
1
0.01 0.1
Response time [ms]
Load capacitance [μF]
Ta = 25
°C
S-1000C15
tPLH
tPHL
0.00001 0.0001 0.001
0.01
0.001
0.1
1
10
0.01 0.1
Response time [ms]
Load capacitance [μF]
Ta = 25
°C
Pull-up to V
DD
Pull-up resistance
: 100 k
100
t
PLH
t
PHL
S-1000N46
0.00001 0.0001 0.001
0.01
0.001
0.1
1
0.01 0.1
Response time [ms]
Load capacitance [μF]
Ta = 25
°C
S-1000C46
t
PLH
t
PHL
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
21
VIH
Output voltage
Input voltagae
VIL
VDD
tPHL tPLH
VIH 5.5 V, VIL 0.95 V
1 s
1 s
VDD 10%
VDD 90%
Figure 22 Measurement condition for response time
OUT
VSS
VDD
S-1000
Series
V
R
*1
100 k
C
OUT
V
DD
V
*1. R is unnecessary for CMOS output products.
Figure 23 Measurement circuit for response time
Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
evaluation using the actual application to set the constants.
Application Circuit Examples
1. Microcomputer reset circuits
If the power supply voltage to a microcomputer falls below the specified level, an unspecified operation may be
performed or the contents of the memory register may be lost. When power supply voltage returns to normal, the
microcomputer needs to be initialized before normal operations can be done.
Reset circuits protect microcomputers in the event of current being momentarily switched off or lowered.
Reset circuits shown in Figures 24, 25 can be easily constructed with the help of the S-1000 series, that has low
operating voltage, a high-precision detection voltage and hysteresis.
VSS
VDD
Microcomputer
S-1000C
VSS
(Only for Nch open-drain products)
VDD1 VDD2
Microcomputer
S-1000N
Figure 24 Reset circuit example(S-1000C) Figure 25 Reset circuit example (S-1000N)
Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
evaluation using the actual application to set the constants.
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series Rev.3.1_02
22
2. Power-on reset circuit
A power-on reset circuit can be constructed using Nch open-drain output product of S-1000 Series.
(Nch open-drain products)
OUT
VIN
VSS
VDD
S-1000N
R*1
C*1
Di*2
*1. R should be 75 k or less, and C should be 0.01 F or more to prevent oscillation.
If C is not connected, R should be 800 or less.
*2. Diode Di instantaneously discharges the charge stored in the capacitor (C) at the power falling, Di can be removed
when the delay of the falling time is not important.
Figure 26
VDD
(V)
t (s)
OUT
(V)
t (s)
Figure 27
Remark When the power rises sharply as shown in the Figure 28 left, the output may go to the high level for an instant
in the undefined region where the output voltage is undefined since the power voltage is less than the minimum
operation voltage.
VDD
(V)
t (s)
OUT
(V)
t (s)
Figure 28
Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
evaluation using the actual application to set the constants.
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Rev.3.1_02 S-1000 Series
23
3. Change of detection voltage
In Nch open-drain output products of the S-1000 series, detection voltage can be changed using resistance dividers or
diodes as shown in Figures 29 to 30. In Figure 29, hysteresis width also changes.
(Nch open-drain
output products)
R
A*1
OUT
VIN
VSS
VDD
S-1000N
R
B
C
*1
DET
B
BA V
R
RR
voltagae Detection
HYS
B
BA V
R
RR
widthHysterisis
(Nch open-drain
output product)
V
f1
OUT
VIN
VSS
VDD
S-1000N
V
f2
Detection voltage = Vf1+Vf2+(VDET)
Figure 30
*1. RA should be 75 k or less, and C should be 0.01 F
or more to prevent oscillation.
If C is not connected, RA should be 800 or less.
Caution If RA and RB are large, the hysteresis width
may also be larger than the value given by
the above equation due to the through-type
current (which flows slightly in an Nch
open-drain product).
Figure 29
Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
evaluation using the actual application to set the constants.