SGM803/SGM809/SGM810

Microprocessor Supervisory

Circuit in 3-Pin SOT-23

SG Micro Corp

www.sg-micro.com

JANUARY 2018 – REV. E. 3

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

240ms. This holds the microprocessor in a reset state

SGM803/ SGM809 provides an active low reset signal

signal (RESET) output. The SGM809/SGM810 has

push-pull outputs, whereas the SGM803 has an

open-drain output, which requires an external pull-up

resistor.

Eight reset threshold voltage options are available

suitable for monitoring 1.8V, 2.5V, 3V, 3.3V and 5V

supply voltages.

The reset comparator features built-in glitch immunity,

The low supply current of typically 13μA makes the

SGM803/SGM809/SGM810 ideal for use in portable,

battery operated equipment. All are specified over the

extended -40

℃ to +125℃ temperature range.

FEATURES

● Precision Voltage Monitor: 1.8V, 2.5V, 3V, 3.3V,

5V Options

● Superior Upgrade for MAX803/MAX809/MAX810

and ADM803/ADM809/ADM810

● Fully Specified over Temperature

● Low Power Consumption: 13μA (TYP)

● 150ms Power-On Reset (MIN)

Open-Drain RESET Output (SGM803)

Push-Pull RESET Output (SGM809)

Push-Pull RESET Output (SGM810)

● -40℃ to +125℃ Operating Temperature Range

● Small Packaging

SGM803 Available in SOT-23-3 and SOT-23

SGM809 Available in SOT-23-3 and SOT-23

SGM810 Available in SOT-23-3 and SOT-23

APPLICATIONS

Microprocessor Systems

Controllers

Intelligent Instruments

Automotive Systems

Safety Systems

Portable Instruments

TYPICAL APPLICATION

MICROPROCESSOR

SYSTEM

SGM803/SGM809

GND

RESET

RESET

GND

SGM803

only