MAX792L|MAX792M|MAX792R|MAX792S|MAX792T - Maxim美信公司微处理器及非易失存储器监控电路

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MAX792L|MAX792M|MAX792R|MAX792S|MAX792T - 典型电路框图：

Maxim产品 - MAX792L|MAX792M|MAX792R|MAX792S|MAX792T介绍

MAX792L|MAX792M|MAX792R|MAX792S|MAX792T - 微处理器及非易失存储器监控电路

MAX792L|MAX792M|MAX792R|MAX792S|MAX792T - 微处理器及非易失存储器监控电路 - 美信芯片 - 微处理器和非易失存储器监控电路 - 美信半导体

产品概述

The MAX792/MAX820 microprocessor (µP) supervisory circuits provide the most functions for power-supply and watchdog monitoring in systems without battery backup. Built-in features include the following:

µP reset: Assertion of RESET and active-low RESET outputs during power-up, power-down, and brownout conditions. Active-low RESET is guaranteed valid for VCC down to 1V.
Manual-reset input.
Two-stage power-fail warning: A separate low-line comparator compares VCC to a presetthreshold 120mV above the reset threshold; the low-line and reset thresholds can be programmed externally.
Watchdog fault output: Assertion of active-low WDO if the watchdog input is not toggled within a preset timeoutperiod.
Pulsed watchdog output: Advance warning of impending active-low WDO assertion from watchdog timeout thatcauses hardware shutdown.
Write protection of CMOS RAM, EEPROM, or other memory devices.

The MAX792 and MAX820 are identical, except the MAX820 guarantees higher low-line and reset threshold accuracy (±2%).

关键特性

以下关键特性由Maxim美信半导体提供：

Manual-Reset Input

200ms Power OK/Reset Time Delay

Independent Watchdog Timer-Preset or Adjustable

On-Board Gating of Chip-Enable Signals

Memory Write-Cycle Completion

10ns (max) Chip-Enable Gate Propagation Delay

Voltage Monitor for Overvoltage Warning

±2% Reset and Low-Line Threshold Accuracy (MAX820, external programming mode)

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