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SGM803

SGM809

SGM810

GENERAL DESCRIPTION

The SGM803/SGM809/SGM810 supervisory circuits

monitor the power supply voltage in microprocessor and

digital systems. They provide a reset output during

power-up, power-down and brownout conditions. On

power-up, an internal timer holds reset asserted for 240 ms.

This holds the microprocessor in a reset state until

conditions have stabilized. The

RESET

output remains

operational with V

as low as 1 V. The SGM803/SGM809

provides an active low reset signal (

RESET

) while the

SGM810 provides an active high signal (RESET) output.

The SGM809/SGM810 have push-pull outputs, whereas the

SGM803 has an open-drain output, which requires an

external pull-up resistor.

Seven reset threshold voltage options are available suitable

for monitoring 2.5V, 3V, 3.3V, and 5V supply voltages.

The reset comparator features built-in glitch immunity,

making it immune to fast transients on V

The low supply current of typically 17

A makes the

SGM803/SGM809/SGM810 ideal for use in portable, battery

operated equipment. They are available in the 3-pin SOT23

package.

Microprocessor Supervisory

Circuit in 3-Pin SOT23

FEATURES

−

Precision Voltage Monitor: 2.5V,3 V, 3.3 V, 5 V

Options

−

Superior Upgrade for MAX803/MAX809/MAX810

and SGM803/SGM809/SGM810

−

Fully Specified over Temperature

−

Low Power Consumption (17μA Typ)

−

Reset Assertion Down to 1 V V

−

160 ms Min Power-On Reset

Open-Drain

RESET

Output(SGM803)

Push-Pull

RESET

Output (SGM809)

Push-Pull RESET Output (SGM810)

−

Compact 3-Pin SOT23 Package

PIN CONFIGURATIONS（TOP VIEW）

APPLICATIONS

Microprocessor Systems

Controllers

Intelligent Instruments

Automotive Systems

Safety Systems

Portable Instruments

GND

SGM803

SGM809

SGM810

RESET/RESET

SOT23-3

TYPICAL OPERATION CIRCUIT

RESET

PULL-UP

SGM803 only

SGM803/SGM809

RESET

MICROPROCESSOR

SYSTEM

RESET

SGM809-

ZXN3L

(only)

GND

SOT23-3(L-Type)

GND

Shengbang Microelectronics Co, Ltd

Tel: 86/451/84348461

www.sg-micro.com

REV. B

ORDERING INFORMATION

MODEL

RESET

THRESHOLD

(V)

4.63

4.38

3.08

2.93

2.63

2.32

4.63

4.38

4.00

SGM809

3.08

2.93

2.63

2.32

4.63

4.38

4.00

SGM810

3.08

2.93

2.63

2.32

SPECIFIED

TEMPERATURE

RANGE

ORDERING

NUMBER

SGM803-LXN3

SGM803-MXN3

SGM803-TXN3

SGM803-SXN3

SGM803-RXN3

SGM803-ZXN3

SGM809-LXN3

SGM809-MXN3

SGM809-JXN3

SGM809-TXN3

SGM809-SXN3

SGM809-RXN3

SGM809-ZXN3

SGM809-ZXN3L

SGM810-LXN3

SGM810-MXN3

SGM810-JXN3

SGM810-TXN3

SGM810-SXN3

SGM810-RXN3

SGM810-ZXN3

PACKAGE

MARKING

803L

803M

803T

803S

803R

803Z

809L

809M

809J

809T

809S

809R

809Z

809ZL

810L

810M

810J

810T

810S

810R

810Z

PACKAGE

OPTION

SGM803

- 40°C to +125°C

Tape and Reel, 3000

SGM803/809/810

ABSOLUTE MAXIMUM RATINGS

(Typical values are at T

= 25°C, unless otherwise noted.)

................................................................................–0.3 V to +6 V

RESET,

RESET

...............................................–0.3 V to V

+0.3 V

Input Current , V

.................................................................20 mA

Output Current, RESET,

RESET

......................................... 20 mA

Rate of Rise, V

.................................................................100 V/µs

Power Dissipation, P

@ T

= 25℃

SOT23-3 .....................................................................................0.4W

Package Thermal Resistance

SOT23-3,

....................................................................... 250℃/W

Operating Temperature Range...........................- 40°C to +125°C

Junction Temperature...........................................................+150°C

Storage Temperature.............................................- 65°C to +150°C

Lead Temperature (soldering, 10s).....................................+260°C

ESD Susceptibility

HBM..........................................................................................4000V

MM..............................................................................................400V

Stresses 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 in the operational

sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect

device reliability.

PIN DESCRIPTION

NAME

GND

SGM803

Pin Number

SGM809-

SGM809

ZXN3L

SGM810

—

Ground

Active Low reset.

RESET

remains low while V

is below the reset

threshold, and remains low for 240 ms (typ) after V

rises above the

reset threshold.

Active High reset. RESET remains high while V

is below the reset

RESET

—

threshold, and remains high for 240 ms (typ) after V

rises above the

reset threshold.

Power supply voltage that is monitored.

FUNCTION

RESET

SGM803/809/810

ELECTRICAL CHARACTERISTICS

Typ = 5 V for L/M/J Models, 3.3 V for T/S Models, 3 V for R Models, 2.5 V for Z Models; unless otherwise noted.)

PARAMETER

SUPPLY

= 0°C to 70°C

Voltage

= - 40°C to +125°C

< 5.5 V, SGM8_L/M/J, T

= 25°C

< 5.5 V, SGM8_L/M/J, T

= - 40°C to +125°C

Current

< 3.6 V, SGM8_R/S/T/Z, T

= 25°C

< 3.6 V, SGM8_R/S/T/Z, T

= - 40°C to +125°C

RESET VOLTAGE THRESHOLD

= 25°C

SGM8_L

= - 40°C to +125°C

= 25°C

SGM8_M

= - 40°C to +125°C

= 25°C

SGM809J/SGM810J

= - 40°C to +125°C

= 25°C

SGM8_T

= - 40°C to +125°C

= 25°C

SGM8_S

= - 40°C to +125°C

= 25°C

SGM8_R

= - 40°C to +125°C

= 25°C

SGM8_Z

RESET THRESHOLD

Temperature Coefficient

to RESET/

RESET

Delay

Reset Active Timeout Period

= V

to (V

–100 mV)

- 40°C to +85°C

160

100

= - 40°C to +125°C

4.537

4.40

4.292

4.16

3.92

3.8

3.003

2.92

2.857

2.78

2.564

2.50

2.262

2.22

240

560

840

2.32

2.63

2.93

3.08

4.00

4.38

4.63

4.723

4.86

4.468

4.56

4.08

4.2

3.157

3.23

3.003

3.08

2.696

2.76

2.378

2.42

ppm/°C

µs

1.0

1.2

5.5

µA

CONDITIONS

MIN

TYP

MAX

UNITS

= - 40°C to +125°C

RESET/

RESET

OUTPUT VOLTAGE

Low (SGM803R/S/T/Z)

Low (SGM809R/S/T/Z)

Low (SGM803L/M/J)

Low (SGM809L/M/J)

Low (SGM803R/S/T/L/M/J/Z)

Low (SGM809R/S/T/L/M/J/Z)

High (SGM809R/S/T/Z)

High (SGM809L/M/J)

Low (SGM810R/S/T/Z)

Low (SGM810L/M/J)

High (SGM810 R/S/T/L/M/J)

= V

TH(MIN)

, I

SINK

= 1.2mA

0.3

= V

TH(MIN)

, I

SINK

= 3.2mA

0.4

> 1.0 V, I

SIN

K = 50µA

> V

TH(MAX)

, I

SOURCE

= 500µA

> V

TH(MAX)

, I

SOURCE

= 800µA

= V

TH(MAX)

, I

SINK

= 1.2mA

= V

TH(MAX)

, I

SINK

= 3.2mA

1.8 V < V

< V

TH(MIN)

, I

SOURCE

= 150µA

> V

, reset de-asserted

0.8×V

– 1.5

0.3

0.4

RESET

Open-Drain Output

Leakage Current (SGM803)

µA

Specifications subject to change without notice.

４

SGM803/809/810

TYPICAL PERFORMANCE CHARACTERISTICS

Power-Down RESET Delay vs.Temperature

250

SGM8_L/M/J

= V

- V

= 10mV

150

100

-50 -30 -10

110 130

= 100mV

= 200mV

= 20mV

Power-Down RESET Delay vs.Temperature

300

SGM8_T/S/R/Z

= V

- V

= 10mV

Power-Down RESET (µS)

200

Power-Down RESET (µS)

250

200

150

100

-50 -30 -10

= 20mV

= 100mV

= 200mV

110 130

Temperature(℃)

Supply Current vs. Temperature (No Load)

= 5.5V

Power-Up RESET Delay vs.Temperature

264

262

260

258

256

254

252

250

248

-50 -30 -10

110 130

SGM809S

Power-Down RESET (mS)

Supply Current (µA)

-50 -30 -10

= 3.6V

110 130

Temperature(℃)

Normalized RESET Voltage Threshold vs.

Temperature

Normalized RESET Threshold

1.006

1.004

1.002

0.998

0.996

0.994

0.992

0.99

0.988

-50 -30 -10

110 130

Maximum Transient Duration Without Causing a

Reset Pulse vs. RESET Comparator Overdrive

Maximum Transient Duration (µS)

400

350

300

250

200

150

100

1000

SGM8_R/S/T/Z

SGM8_L/M/J

1.008

Temperature(℃)

RESET Comparator Overdrive

- V

(mV)

５

SGM803/809/810