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%).

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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控制器

精确的µP监控

智能仪表

MAX8869 - 1A、MicroCap、低压差、线性稳压器

MAX4603 - 2.5Ω、四路、SPST、CMOS模拟开关

MAX4633 - 故障保护、高电压、双路模拟开关

DG528 - 8通道、带锁存的多路复用器

MAX17530 - 42V、25mA、超小、高效、同步降压型DC-DC转换器，空载耗流仅为22µA

MAX15050 - 高效、4A、1MHz、降压型调节器，内置开关，采用2mm x 2mm封装

MAX13055E - 1.62V至3.6V、8通道、高速LLT

MAX364 - 高精度、四路、SPST模拟开关

MAX2208 - RF功率检测器，UCSP封装

MAX6874 - EEPROM可编程、六/四路电源排序器/监控电路