SGM809.pdf
No.10906
● 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)
● Reset Assertion Down to 1V VCC
● 150ms Power-On Reset (MIN)
Push-Pull RESET Output (SGM810)
● -40℃ to +125℃ Operating Temperature Range
● Small Packaging
SGM809 Available in SOT-23-3 and SOT-23
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 until conditions have stabilized. The RESEToutput remains operational with VCC as low as 1V. The SGM803/ SGM809 provides an active low reset signal (RESET) while the SGM810 provides an active high 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, making it immune to fast transients on VCC.
