MB3771

Power Supply Monitor

Cypress Semiconductor Corporation

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198 Champion Court

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San Jose

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408-943-2600

Document Number: 002-08511 Rev. *A

Revised March 16, 2016

The Cypress MB3771 is designed to monitor the voltage level of one or two power supplies (+5 V and an arbitrary voltage) in a

microprocessor circuit, memory board in large-size computer, for example.

If the circuit’s power supply deviates more than a specified amount, then the MB3771 generates a reset signal to the microprocessor.

Thus, the computer data is protected from accidental erasure.

Using the MB3771 requires few external components. To monitor only a +5 V supply, the MB3771 requires the connection of one

external capacitor. The level of an arbitrary detection voltage is determined by two external resistors. The MB3771 is available in an

8-pin Dual In-Line, Single In-Line Package or space saving Flat Package.

Features

Application