RS810

Supply Voltage Supervisor with Reset Circuits
1 FEATURES

3 DESCRIPTIONS•

Operating Voltage Range:1.2V to 5.5V•

Low Power Consumption:50µA (Max)•Precision Supply-Voltage Monitor:
2.63V, 2.93V, 3.08V, 4.00V, 4.65V•

Guaranteed RESET Valid at VCC=1.2V•

200ms Reset Pulse Width•

Voltage Monitor for Power-Fail or LowBattery Warning•

Operating Temperature Range:-40°C to +125°C•Push-pull, RESET Output•

Available in Green Package: SOT23

The RS810 microprocessor (µP) supervisory circuits
reduce the complexity and number of components
required to monitor power-supply and battery function
in µP systems. This device significantly improves
system reliability and accuracy compared to separate
ICs or discrete components.
These circuits perform a single function: they assert areset signal whenever the VCC supply voltage declines
below a preset threshold, keeping it asserted for at least
200ms after VCC has risen above the reset threshold.
Reset thresholds suitable for operation with a variety ofsupply voltages are available.
The RS810 have push-pull outputs. The RS810 has anactive-high RESET output. The reset comparator isdesigned to ignore fast transients on VCC, and theoutputs are guaranteed to be in the correct logic statefor VCC down to 1.2V.

2 APPLICATIONS•

Computers•

SOC 、DSP or Micro controllers•

Embedded Systems•

Industrial Equipment•

Intelligent Instruments•

Critical µP Power Monitoring•

Wireless Communications Systems

Low supply current makes the RS810 ideal for use inportable equipment.The RS810 is available in Green
SOT23 package. It operates over an ambienttemperature range of -40°C to +125°C.

Device Information (1)PART
NUMBER
RS810(1)

PACKAGEBODY SIZE (NOM)

SOT23(3)1.30mm×2.92mm

For all available packages, see the orderable addendum at theend of the data sheet.

4 TYPICAL APPLICATION
RS3005
IN

OUT

Vcc
Vcc

FPGA,ASIC,DSP
RS810 RESETGND

REV A.2

RESET

GND

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RS810
Table of Contents
1 FEATURES .......................................................................................................................................................1
2 APPLICATIONS ................................................................................................................................................1
3 DESCRIPTIONS ................................................................................................................................................1
4 TYPICAL APPLICATION ..................................................................................................................................1
5 Revision History ..............................................................................................................................................36 PACKAGE/ORDERING INFORMATION (1) ......................................................................................................47 PIN CONFIGURATIONS ...................................................................................................................................58 Specifications ..................................................................................................................................................68.1 Absolute Maximum Ratings (1) ....................................................................................................................68.2 ESD Ratings................................................................................................................................................68.3 ELECTRICAL CHARACTERISTICS ...........................................................................................................78.4 TYPICAL OPERATING CHARACTERISTICS ............................................................................................79 Function Block Diagram .............................................................................................................................. 1010 Detailed Description ................................................................................................................................... 1011 Applications Information ........................................................................................................................... 1111.1 Ensuring a Valid RESET Output Down to VCC=0V ................................................................................ 1111.2 Reset Timing .......................................................................................................................................... 11
12 PACKAGE OUTLINE DIMENSIONS ........................................................................................................... 1213 TAPE AND REEL INFORMATION .............................................................................................................. 132 / 14

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RS8105 Revision History
Note: Page numbers for previous revisions may different from page numbers in the current version.
VersionChange Date

A.1

2021/08/09

A.2

2023/07/24

Change Item
Initial version completed
1. Update PACKAGE MARKING on Page 5@RevA.1
2. Update Operating Temperature Range: -40°C to +125°C
3. Modify Operating Voltage Range: 1.2V to 5.5V
4. Update ESD Ratings
5. Added RS810-4.65YSF3 ORDERING NUMBER

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RS8106 PACKAGE/ORDERING INFORMATION (1)PRODUCTRS810

ORDERING
NUMBERTEMPERATURE
RANGE

PACKAGELEAD

PACKAGEMARKING (2/3)

PACKAGE OPTION

RS810-2.63YSF3-40°C ~+125°C

SOT23810B

Tape and Reel,3000

RS810-2.93YSF3-40°C ~+125°C

SOT23810C

Tape and Reel,3000

RS810-3.08YSF3-40°C ~+125°C

SOT23810D

Tape and Reel,3000

RS810-4.00YSF3-40°C ~+125°C

SOT23810E

Tape and Reel,3000

RS810-4.65YSF3-40°C ~+125°C

SOT23810G

Tape and Reel,3000

NOTE:(1) This information is the most current data available for the designated devices. This data is subject to change without notice and revisionof this document. For browser-based versions of this data sheet, refer to the right-hand navigation.
(2) There may be additional marking, which relates to the lot trace code information(data code and vendor code)，the logo or theenvironmental category on the device.
(3) B, C, D, E, G represents different Reset Thresholds.

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RS8107 PIN CONFIGURATIONS(TOP VIEW)
GND

1
RS810

RESET

3

VCC

2
SOT23PIN DESCRIPTION
PIN
NAME

FUNCTION

1GND

2RESET

3VCC

Ground, reference for all signals.
Active-High Reset Output remains high while VCC is below the reset threshold, andfor at least 200ms after VCC rises above the reset threshold.
Power Supply Voltage that is monitored.

SOT23

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RS8108 Specifications
8.1 Absolute Maximum Ratings (1)over operating free-air temperature range (unless otherwise noted) (1)(2)

(2)
(3)
(4)
(5)

MAXUNIT

VCC

Supply voltage range

-0.5

6.0

VVI

Input voltage range (2)

-0.5

6.0

V-0.5

6.0

V-0.5

VCC+0.5

VVo

Voltage range applied to any output in the high-impedance or power-offstate(2)Voltage range applied to any output in the high or low state (2)(3)

IIKInput clamp current

VI<0-20mAIOK

Output clamp current

VO<0-20mA

IO

Continuous output current±20mA

Continuous current through VCC or GND±20mA

295°C/W

Vo(1)

MIN

θJA

Package thermal impedance (4)TJ

Junction temperature (5)

-65

150°C

Tstg

Storage temperature-65150°C

TA

Operating temperature

-40

125°C

SOT23Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended OperatingConditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
The value of VCC is provided in the Recommended Operating Conditions table.
The package thermal impedance is calculated in accordance with JESD-51.
The maximum power dissipation is a function of TJ(MAX), RθJA, and TA. The maximum allowable power dissipation at any ambient
temperature is PD = (T J(MAX) - TA) / RθJA. All numbers apply for packages soldered directly onto a PCB.

8.2 ESD Ratings
The following ESD information is provided for handling of ESD-sensitive devices in an ESD protected area only.

V(ESD)

Electrostatic discharge

VALUE

UNIT

Human-body model (HBM), MIL-STD-883K METHOD 3015.9±4000

VMachine model (MM), JESD22-A115C (2010)

±200

V

ESD SENSITIVITY CAUTION
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric changes could cause the device not to meet its publishedspecifications.

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RS8108.3 ELECTRICAL CHARACTERISTICS(VCC = 2.74V to 5.5V for RS810-2.63; VCC = 3.05V to 5.5V for RS810-2.93; VCC = 3.21V to 5.5V for RS810-3.08; VCC = 4.17V
to 5.5V for RS810-4.00; VCC = 4.84V to 5.5V for RS810-4.65; TA = -40°C to +125°C, unless otherwise noted, typical at 25°C.)
PARAMETERSYMBOLOperating Voltage Range

VCC

Supply Current

ISUPPLY

Reset Threshold

VRT

Reset Threshold
Hysteresis

Reset Pulse Width
Reset Threshold
Temperature Coefficient (1)VCC to RESET delay
RESET Output voltage

TEST CONDITIONS

MIN

TYP

1.2

MAX

UNIT

5.5

V
µA

2050

RS810-2.63

2.50

2.63

2.74

RS810-2.93

2.80

2.93

3.05

RS810-3.08

2.94

3.08

3.21

RS810-4.00

3.82

4.00

4.17

RS810-4.65

4.44

4.65

4.84

RS810-2.63

12

RS810-2.93

14RS810-3.08

15RS810-4.00

20RS810-4.65

23tRS

100tRD

VCC=3.3V, RS810-2.93

HighISOURCE = 500uALow

ISINK = 1.2mA

200VmV

460ms

30ppm/°C

33µs

0.7xVCC
0.4V(1) This parameter is ensured by design and/or characterization and is not tested in production.

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RS810
8.4 TYPICAL OPERATING CHARACTERISTICS

300

24250

20-40℃

Supply Current(µA)

Reset Pulse Width(ms)

NOTE: The graphs and tables provided following this note are a statistical summary based on a limited number of samples
and are provided for informational purposes only.

2001501005025℃
85℃

16125℃
12840-40 -25 -10 5 20 35 50 65 80 95 110125

1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

Temperature (℃)

Supply Voltage(V)

50

5045
4035302520151050

VCC=3.3V for RS810-2.93

VCC=3.3V for RS810-2.93
40

Reset Delay(µs)

Transient Duration(µs)

Figure 1. Reset Pulse Width vs Temperature

Figure 2. Supply Voltage vs Supply Current

30201000200

400600800-40 -25 -10 5 20 35 50 65 80 95 110125

1000 1200

Temperature (℃)

Reset Threshold Overdrive(mV)Figure 4. Reset Delay vs Temperature

Figure 3. Transient Duration vs ResetThreshold Overdrive

3.0
RS810-2.93

RESET Output Voltage(V)RESET Output Voltage(V)

0.7
0.6
0.5
0.4
0.3
-40℃
25℃
85℃
125℃

0.2
0.1
0.0
1.0

2.0

3.0

4.0

5.0

6.0

7.0

2.0
1.5
1.0

-40℃
25℃
85℃
125℃

0.5
0.0

8.0

1.0

Sink Current(mA)

Figure 5. RESET Output Voltage vs SinkCurrent

RS810-2.93
2.5

1.5

2.0

2.5

3.0

3.54.0Source Current(mA)

Figure 6. RESET Output Voltage vs SourceCurrent

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RS810TYPICAL OPERATING CHARACTERISTICS

Nomalized Reset Threshold (V)NOTE: The graphs and tables provided following this note are a statistical summary based on a limited number of samples
and are provided for informational purposes only.

RS810-2.93

1.006
1.005
1.004
1.003
1.002
1.001
10.999
0.998
0.997
0.996

-40 -25 -10 5 20 35 50 65 80 95 110125

Temperature (℃)

Figure 7. Normalized Reset Threshold vsTemperature9 / 14

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RS810
9 Function Block Diagram

RESET
GENERATOR
Vcc

2RESET

31 GND

10 Detailed Description
A microprocessor’s (µP’s) reset input starts the µP in a known state. The RS810 assert reset to prevent codeexecution errors during power-up, power-down or brownout conditions. They assert a reset signal whenever theVCC supply voltage declines below a preset threshold, keeping it asserted for at least 200ms after VCC has risenbove the reset threshold.The RS810 have a push-pull output stage.

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RS81011 Applications Information
11.1 Ensuring a Valid RESET Output Down to VCC=0V
When VCC falls down below 1.2V, the RS810 RESET output no longer sinks current, it becomes an open circuit.
High-impedance CMOS logic inputs can drift to undetermined voltages if left un-driven. If a pull-down resistor
is added to the RESET pin, as shown in Figure 8, any stray charge or leakage currents will be drained to ground,holding RESET high. Resistor value (R1) is not critical. It should be about 100KΩ, large enough not to load
RESET and small enough to pull RESET to ground.
A 100KΩ pull-up resistor to VCC is also recommended for the RS810 if RESET is required to remain valid for
VCC <1.0V

RESET

R1

Figure 8. RESET Valid to Ground Circuit

11.2 Reset Timing
The reset signal is asserted high for the RS810 when the power supply voltage falls below the threshold trip
voltage and remains asserted for at least 200ms after the power supply voltage has risen above the threshold.

Vcc

Vcc

Vcc

Figure 9. RESET Timing Diagram11 / 14

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RS81012 PACKAGE OUTLINE DIMENSIONSSOT23 (3)
D

1.90

b2.29

E1

E
0.76
0.95

0.76ee1

RECOMMENDED LAND PATTERN (Unit: mm)

0.2
A A2c

θ
L

A1

Dimensions In Millimeters

Dimensions In Inches

SymbolMinMaxMinMax

A (1)

0.900

1.150

0.035

0.045

A1

0.000

0.100

0.000

0.004

A20.900

1.050

0.035

0.041

b0.300

0.500

0.012

0.020

c0.080

0.150

0.003

0.006

D (1)

2.800

3.000

0.110

0.118

E (1)

1.200

1.400

0.047

0.055

E12.250

2.550

0.089

0.100

0.950 (BSC) (2)e0.037 (BSC) (2)

e1

1.800

2.000

0.071

0.079

L

0.300

0.500

0.012

0.020

θ

0°

8°

0°8°

NOTE:
1. Plastic or metal protrusions of 0.15mm maximum per side are not included.
2. BSC (Basic Spacing between Centers), "Basic" spacing is nominal.
3. This drawing is subject to change without notice.

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RS81013 TAPE AND REEL INFORMATIONREEL DIMENSIONSTAPE DIMENSION

ReelDiameter

Reel Width(W1)

DIRECTION OF FEEDNOTE: The picture is only for reference. Please make the object as the standard.

KEY PARAMETER LIST OF TAPE AND REEL
Package
TypeReel
Diameter

SOT237’’Reel
Width(mm)9.5A0(mm)B0(mm)

K0(mm)

P0(mm)

P1(mm)

P2(mm)

W(mm)Pin1
Quadrant

3.15

2.77

1.22

4.0

4.0

2.0

8.0

Q3

NOTE:
1. All dimensions are nominal.
2. Plastic or metal protrusions of 0.15mm maximum per side are not included.

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RS810IMPORTANT NOTICE AND DISCLAIMER
Jiangsu RUNIC Technology Co., Ltd. will accurately and reliably provide technical and reliability data (including
data sheets), design resources (including reference designs), application or other design advice, WEB tools,
safety information and other resources, without warranty of any defect, and will not make any express or implied
warranty, including but not limited to the warranty of merchantability Implied warranty that it is suitable for a
specific purpose or does not infringe the intellectual property rights of any third party.
These resources are intended for skilled developers designing with RUNIC products You will be solely
responsible for: (1) Selecting the appropriate products for your application; (2) Designing, validating and testing
your application; (3) Ensuring your application meets applicable standards and any other safety, security orother requirements; (4) RUNIC and the RUNIC logo are registered trademarks of RUNIC INCORPORATED. All
trademarks are the property of their respective owners; (5) For change details, review the revision history
included in any revised document. The resources are subject to change without notice. Our company will not
be liable for the use of this product and the infringement of patents or third-party intellectual property rights due
to its use.

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