SG Micro Corp

SGM809 Microprocessor Supervisory Circuit in 3-Pin SOT-23

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 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.


PIN CONFIGURATIONS


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 V
CC
• 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

APPLICATIONS

Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments


ORDERING INFORMATION

Part Number Status Package Pins Pb-Free Temp Range
SGM809-LXN3/TR Production SOT-23-3 3 Y -40℃ to +125℃ Samples
SGM809-LXN3L/TR Production SOT-23 3 Y -40℃ to +125℃ Samples
SGM809-MXN3/TR Production SOT-23-3 3 Y -40℃ to +125℃ Samples
SGM809-MXN3L/TR Production SOT-23 3 Y -40℃ to +125℃ Samples
SGM809-JXN3/TR Production SOT-23-3 3 Y -40℃ to +125℃ Samples
SGM809-JXN3L/TR Production SOT-23 3 Y -40℃ to +125℃ Samples
SGM809-TXN3/TR Production SOT-23-3 3 Y -40℃ to +125℃ Samples
SGM809-TXN3L/TR Production SOT-23 3 Y -40℃ to +125℃ Samples
SGM809-SXN3/TR Production SOT-23-3 3 Y -40℃ to +125℃ Samples
SGM809-SXN3L/TR Production SOT-23 3 Y -40℃ to +125℃ Samples
SGM809-RXN3/TR Production SOT-23-3 3 Y -40℃ to +125℃ Samples
SGM809-RXN3L/TR Production SOT-23 3 Y -40℃ to +125℃ Samples
SGM809-ZXN3/TR Production SOT-23-3 3 Y -40℃ to +125℃ Samples
SGM809-ZXN3L/TR Production SOT-23 3 Y -40℃ to +125℃ Samples
SGM809-XXN3/TR Production SOT-23-3 3 Y -40℃ to +125℃ Samples
SGM809-XXN3L/TR Production SOT-23 3 Y -40℃ to +125℃ Samples

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