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MAX801L, MAX801M, MAX801N, MAX808L, MAX808M, MAX808N
8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy
1.5% Accurate Reset ICs with Battery-Backup
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Status
Active: In Production.
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.
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Data Sheet
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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
- Underwriters Laboratories (UL) Recognized
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Applications/Uses
- Computers: Desktop, Workstation, Server
- Controllers
- Critical µP Monitoring
- Embedded Systems
- Intelligent Instruments
- Portable Battery-Powered Equipment
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Key Specifications:
| Battery Backup Circuits |
| Part Number |
Reset Thresh.
(V) |
Reset Out |
ICC
(µA) |
Features |
Industry Qualified |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max |
max w/pins |
See Notes |
| MAX801 |
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| Active High | | Active Low | | Push-Pull |
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110 |
| High Accuracy (1%) | | Low Line | | Watchdog |
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Automotive - General |
| -55 to +125 | | -40 to +85 | | 0 to +70 |
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79.7 |
$3.54 @1k |
| MAX808 |
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90 |
| Chip Enable Gate | | High Accuracy (1%) | | Low Line |
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30.9 |
$3.54 @1k |
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See All Battery Backup Circuits (86)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Notes and Comments
Watchdog timer (MAX801)
CMOS RAM write protection (MAX808)
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Information Index
Document Ref.: 19-1086
Rev 1;
2006-12-05
This page last modified: 2007-07-18
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