MAX810/MAX810L/MAX810M pdf dat

The MAX803/MAX809/MAX810 are microprocess or(µP) supervisory circuits used to monitor the power supplies in µP and digital sys tems. They provide excellent circuit reliability and low cost by elimina ting external components and adjustments when used with +5V, +3.3V, +3.0V, or +2.5V powered circuits.

These circuits pe rform a single function: they assert a reset signal whenever the V _CCsupply voltage declines below a preset threshold, keeping it asserted for at least 140ms after V _CChas risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are av ailable.

The MAX803 has an open-drain output stage, while the MAX809/MAX810 have push-pull outputs. The MAX803's open-drain active-low RESET output requires a pull-up resistor that canbe connected to a voltage higher than V _CC. The MAX803/MAX809 have an active-low RESET output, while the MAX810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on V _CC, and the outputs are guaranteed to be in the correct logicstate for V _CCdown to 1V.

Low supply current makes the MAX803/MAX809/MAX810 ideal for use in portable equipment. The MAX803 is available in a 3- pin SC70 package, and the MAX809/MAX810 are available in 3-pin SC70 or SOT23 packages.