MCU监控芯片/SGM809-SXN3L/TR
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 /RESET output 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.
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
• Reset Assertion Down to 1V VCC
• 150ms Min Power-On Reset
Open-Drain /RESETOutput SGM803
Push-Pull /RESETOutput 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
