LM3724IM5X-3.08/NOPB

ACTIVE

Features for the LM3724

• Precise Monitoring of 2.5V, 3.3V, and 5V Supply Voltages

• Fully Specified Over Temperature

• Industrial: −40°C to +85°C

• Extended: −40°C to +125°C

• 100 ms Minimum Power-On Reset pulse Width, 190 ms Typical:

• Active-Low RESET Output (LM3722)

• Active-High RESET Output (LM3723)

• Active-Low RESET Open Drain Output (LM3724)

• Guaranteed RESET Output Valid for VCC ≥ 1V

• Low Supply Current, 6µA Typical

• Power Supply Transient Immunity

• Compatible with MAX811/812 Applications

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Description for the LM3724

The LM3722/LM3723/LM3724 microprocessor supervisory circuits monitor the power supplies in microprocessor and digital systems. They provide a reset to the microprocessor during power-up, power-down, brown-out conditions, and manual reset.

The LM3722/LM3723/LM3724 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 LM3722 has an active-low RESET push-pull output. The LM3723 has an active-high RESET push-pull output. The LM3724 has an active-low open-drain RESET output.

Three standard reset voltage options are available, suitable for monitoring 5V, 3.3V, and 2.5V supply voltages. Additional reset voltages are also available; contact Texas Instruments for details.

With a low supply current of only 6µA, the LM3722/LM3723/LM3724 are ideal for use in portable equipment. The LM3722/LM3723/LM3724 are available in the 5-pin SOT-23 package.