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1FEATURES

2? Renewable Energy Grade

? Precise monitoring of 5V supply voltages

? Fully specified over temperature

– ?40°C to +125°C

? 100 ms minimum Power-On Reset pulse width,

190 ms typical:

– Active-Low RESET Open Drain Output

? RESET Output valid for VCC ≥ 1V

? Low Supply Current, 6μA typical

? Power supply transient immunity

? Compatible with MAX811/812 applications

APPLICATIONS

? Microprocessor Systems

? Computers

? Controllers

? Intelligent Instruments

? Portable/Battery-Powered Equipment

DESCRIPTION

The SM72240 microprocessor supervisory circuit

monitors the power supplies in microprocessor and

digital systems. It provides a reset to the

microprocessor during power-up, power-down,

brown-out conditions, and manual reset.

The SM72240 asserts a reset signal whenever the

supply decreases below the factory-programmed

reset threshold. Reset will be asserted for at least

100ms even after VCC rises above the reset

threshold.

The SM72240 has an active-low open-drain RESET

output.

The SM72240 is suitable for monitoring 5V. With a

low supply current of only 6μA, the SM72240 is ideal

for use in portable equipment. The SM72240 is

available in the 5-pin SOT-23 package.