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Voltage Supervisors 
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MAX808L, MAX808M, MAX808N
8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy
1.5% Accurate Reset ICs with Battery-Backup
Maxim Confidential 
MyMaxim SubscriptionsProduct Details
The MAX801/MAX808 microprocessor (µP) supervisory circuits monitor and control the activities of +5V µPs by providing backup-battery switchover, low-line indication, and µP reset. Additional features include a watchdog for the MAX801 and CMOS RAM write protection for the MAX808.
The MAX801/MAX808 offer a choice of reset-threshold voltage (denoted by suffix letter): 4.675V (L), 4.575V (N), and 4.425V (M). These devices are available in 8-pin DIP and SO packages.
The MAX801/MAX808 offer a choice of reset-threshold voltage (denoted by suffix letter): 4.675V (L), 4.575V (N), and 4.425V (M). These devices are available in 8-pin DIP and SO packages.
Key Features
- Precision Voltage Monitoring, ±1.5% Reset Accuracy
- 200ms Power-OK/Reset Time Delay
- Active-low RESET Output (MAX808)
- RESET and active-low RESET Outputs (MAX801)
- Watchdog Timer (MAX801)
- On-Board Gating of Chip-Enable Signals (MAX808):
- Memory Write-Cycle Completion
- 3ns CE Gate Propagation Delay
- 1µA Standby Current
- Power Switching:
- 250mA in VCC Mode
- 20mA in Battery-Backup Mode
- MaxCap/SuperCap Compatible
- Active-low RESET Guaranteed Valid to VCC = 1V
- Low-Line Threshold 52mV Above Reset Threshold
Applications/Uses
- Computers: Desktop, Workstation, Server
- Controllers
- Critical µP Monitoring
- Embedded Systems
- Intelligent Instruments
- Portable Battery-Powered Equipment
Parametric specs for Battery Backup Circuits
| Reset Thresh. (V) | 4.0 to 4.5 4.5 to 5.0 |
| Reset Out | Active Low Push-Pull |
| ICC (µA) (max) | 90 |
| Oper. Temp. (°C) | -40 to +85 0 to +70 |
| Package/Pins | PDIP/8 SOIC (N)/8 |
| Budgetary Price (See Notes) | $3.79 @1k |
View More
Simplified Block Diagram
MAX801L, MAX801M, MAX801N, MAX808L, MAX808M, MAX808N: Typical Operating Circuit
Technical Docs
| Data Sheet | 8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy | Dec 05, 2006 |
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Support & Training
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Parameters
Parametric specs for Battery Backup Circuits
| Reset Thresh. (V) | 4.0 to 4.5 4.5 to 5.0 |
| Reset Out | Active Low Push-Pull |
| ICC (µA) (max) | 90 |
| Oper. Temp. (°C) | -40 to +85 0 to +70 |
| Package/Pins | PDIP/8 SOIC (N)/8 |
| Budgetary Price (See Notes) | $3.79 @1k |
Key Features
- Precision Voltage Monitoring, ±1.5% Reset Accuracy
- 200ms Power-OK/Reset Time Delay
- Active-low RESET Output (MAX808)
- RESET and active-low RESET Outputs (MAX801)
- Watchdog Timer (MAX801)
- On-Board Gating of Chip-Enable Signals (MAX808):
- Memory Write-Cycle Completion
- 3ns CE Gate Propagation Delay
- 1µA Standby Current
- Power Switching:
- 250mA in VCC Mode
- 20mA in Battery-Backup Mode
- MaxCap/SuperCap Compatible
- Active-low RESET Guaranteed Valid to VCC = 1V
- Low-Line Threshold 52mV Above Reset Threshold
Applications/Uses
- Computers: Desktop, Workstation, Server
- Controllers
- Critical µP Monitoring
- Embedded Systems
- Intelligent Instruments
- Portable Battery-Powered Equipment
Description
The MAX801/MAX808 microprocessor (µP) supervisory circuits monitor and control the activities of +5V µPs by providing backup-battery switchover, low-line indication, and µP reset. Additional features include a watchdog for the MAX801 and CMOS RAM write protection for the MAX808.
The MAX801/MAX808 offer a choice of reset-threshold voltage (denoted by suffix letter): 4.675V (L), 4.575V (N), and 4.425V (M). These devices are available in 8-pin DIP and SO packages.
The MAX801/MAX808 offer a choice of reset-threshold voltage (denoted by suffix letter): 4.675V (L), 4.575V (N), and 4.425V (M). These devices are available in 8-pin DIP and SO packages.
Simplified Block Diagram
MAX801L, MAX801M, MAX801N, MAX808L, MAX808M, MAX808N: Typical Operating Circuit Technical Docs
| Data Sheet | 8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy | Dec 05, 2006 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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