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