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MAX821 - 4-Pin uP Voltage Monitors

General Description

The MAX821/MAX822 microprocessor (µP) supervisory circuits 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 5V-powered or 3V-powered circuits.

Key Features

  • o Pin-Selectable, Precision Power-On Reset Delay: 1ms (max), 20ms (min), or 100ms (min) o Precision Monitoring of +3V to +5V Power-Supply Voltages o 2.5µA Supply Current o Guaranteed Over Temperature (-40°C to +125°C) o Guaranteed RESET Valid to VCC = 1V (MAX821) o Power-Supply Transient Immunity o No External Components o SOT143 Package MAX821/MAX822 Ordering Information PART MAX821LUS-T.

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📁 Similar Datasheet

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Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
MAX8211 Microprocessor Voltage Monitors
MAX8212 Microprocessor Voltage Monitors
MAX8215 Microprocessor Voltage Monitors
MAX820 Microprocessor and Non-Volatile Memory Supervisory Circuits
MAX823 5-Pin Microprocessor Supervisory Circuits

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-1122; Rev 1; 12/99 4-Pin µP Voltage Monitors with Pin-Selectable Power-On Reset Timeout Delay General Description The MAX821/MAX822 microprocessor (µP) supervisory circuits 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 5V-powered or 3V-powered circuits. The MAX821/MAX822 also provide a power-on reset timeout delay that is pin selectable to 1ms (max), 20ms (min), or 100ms (min). These devices perform a single function: they assert a reset signal whenever the V CC supply voltage falls below a preset threshold, and they keep reset asserted for the pin-selected reset timeout delay after VCC has risen above the reset threshold.