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 VCC 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.

FEATURES

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

? 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 VCC

? 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

APPLICATIONS

Microprocessor Systems

Controllers

Intelligent Instruments

Automotive Systems

Safety Systems

Portable Instruments