MCP809, MCP810

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SNVS165A – JUNE 2001 – REVISED MAY 2013

MCP809/MCP810 3-Pin Microprocessor Reset Circuits

Check for Samples: MCP809, MCP810

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FEATURES

DESCRIPTION

The MCP809/810 microprocessor supervisory circuits

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Precise Monitoring of 3V, 3.3V, and 5V Supply

can be used to monitor the power supplies in

Voltages

microprocessor and digital systems. They provide a

•

Fully specified over temperature

reset to the microprocessor during power-up, power-

•

140ms min. Power-On Reset Pulse Width,

down and brown-out conditions.

240ms Typical

The function of the MCP809/810 is to monitor the VCC

–

Active-low RESET Output (MCP809)

supply voltage, and assert a reset signal whenever

this voltage declines below the factory-programmed

–

Active-high RESET Output (MCP810)

reset threshold. The reset signal remains asserted for

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Specified RESET Output Valid for VCC≥1V

240ms after VCC rises above the threshold. The

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Low Supply Current, 15µA typical

MCP809 has an active-low RESET output, while the

MCP810 has an active-high RESET output.

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Power supply transient immunity

Seven standard reset voltage options are available,

APPLICATIONS

suitable for monitoring 5V, 3.3V, and 3V supply

voltages.

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Microprocessor Systems

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Computers

With a low supply current of only 15µA, the

MCP809/810 are ideal for use in portable equipment.

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Controllers

The MCP809/MCP810 are available in the 3-pin

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Intelligent Instruments

SOT23 package.

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Portable/Battery-Powered Equipment

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Automotive

Typical Application Circuit

Figure 1. Typical Application Circuit

Connection Diagram

Figure 2. ( ) are for MCP810

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PRODUCTION DATA information is current as of publication date.

Copyright © 2001–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.