MAX820
MAX820
PRODUCTIONMicroprocessor and Nonvolatile Memory Supervisory Circuits
Microprocessor and Non-Volatile Memory Supervisory Circuits
- Part Models
- 7
- 1ku List Price
- Starting From $7.35
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Overview
- 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)
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 preset threshold 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 timeout period.
- Pulsed watchdog output: Advance warning of impending active-low WDO assertion from watchdog timeout that causes hardware shutdown.
- Write protection of CMOS RAM, EEPROM, or other memory devices.
Applications
- Computers: Desktop, Workstation, Server
- Controllers
- Critical µP Monitoring
- Intelligent Instruments
Documentation
Data Sheet 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX820LCSE+ | 16-Lead SOIC (3.9mm x 9.9mm x 1.55mm) | ||
| MAX820LCSE+T | 16-Lead SOIC (3.9mm x 9.9mm x 1.55mm) | ||
| MAX820LESE+ | 16-Lead SOIC (3.9mm x 9.9mm x 1.55mm) | ||
| MAX820TCSE+ | 16-Lead SOIC (3.9mm x 9.9mm x 1.55mm) | ||
| MAX820TCSE+T | 16-Lead SOIC (3.9mm x 9.9mm x 1.55mm) | ||
| MAX820TESE+ | 16-Lead SOIC (3.9mm x 9.9mm x 1.55mm) | ||
| MAX820TESE+T | 16-Lead SOIC (3.9mm x 9.9mm x 1.55mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571A PIN/ERRATA |
||
| MAX820LCSE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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|---|---|---|
| Supervisory Circuits & Reset ICs 6 | ||
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