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Product Attributes

Overview

The MAX811/MAX812 are low-power microprocessor(μP) supervisory circuits used to monitor power supplies in μP and digital systems. They provide excellent circuit

reliability and low cost by eliminating external components and adjustments when used with 5Vpowered or 3V-powered circuits. The MAX811/MAX812 also provide

a debounced manual reset input.

These devices perform a single function: They assert a reset signal whenever the VCC supply voltage falls below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. The only difference between the two devices is that the MAX811 has an active-low RESET output (which is guaranteed to be in the correct state for VCC down to 1V), while the MAX812 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC. Reset thresholds are available for operation with a variety of supply voltages.

Low supply current makes the MAX811/MAX812 ideal for use in portable equipment. The devices come in a 4-pin SOT143 package. 

Features

● Integrated Voltage Monitor Increases System Robustness with Added Manual Reset

— Precision Monitoring of 3V, 3.3V, and 5V Power-Supply Voltages

— 140ms Min Power-On-Reset Pulse Width

— RESET Output (MAX811), RESET Output (MAX812)

— Guaranteed Over Temperature

— Guaranteed RESET Valid to VCC = 1V (MAX811)

— Power-Supply Transient Immunity

● Saves Board Space

— No External Components

— 4-Pin SOT143 Package

● Low Power Consumption Simplifies Power-Supply Requirements

— 6μA Supply Current

Advantages and Disadvantages

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Applications

● Computers

● Controllers

● Intelligent Instruments

● Critical μP and μC Power Monitoring

● Portable/Battery-Powered Equipment

Compliance

ECCN / UNSPSC

Documents & Media

Product Manufacturer

Maxim Integrated is an American, publicly traded company that designs, manufactures, and sells analog and mixed-signal integrated circuits.Maxim Integrated develops integrated circuits (ICs) for the automotive, industrial, communications, consumer, and computing markets. The company is headquartered in San Jose, California, and has design centers, manufacturing facilities, and sales offices throughout the world. In the fiscal year 2018, it had US$2.48 billion in sales, 7150 employees, and 35,000 customers worldwide. Maxim is a Fortune 1000 company and its stock is a component of the NASDAQ-100 stock market index.Maxim's product portfolio now includes power and battery management ICs, sensors, analog ICs, interface ICs, communications solutions, digital ICs, embedded security, and microcontrollers. In these product segments, the company has made some notable achievements.Analog ICs are a core product area for Maxim. These high-performance building blocks provide a variety of features and capabilities, from ultra-low power consumption to extended battery life, precision signal conversion, and rugged connectivity. A highlight in 2018 for this versatile product line was the electronica 2018 trade show, where attendees saw demos including a nanoPower watch, force-touch technology, CAN ESD protection, and an ISM RF transmitter-based home automation system.

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