MAX801L, MAX801M, MAX801N, MAX808L, MAX808M, MAX808N

8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy

1.5% Accurate Reset ICs with Battery-Backup

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.

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 V_CC Mode
- 20mA in Battery-Backup Mode
MaxCap™/SuperCap™ Compatible
Active-low RESET Guaranteed Valid to V_CC = 1V
Low-Line Threshold 52mV Above Reset Threshold
Underwriters Laboratories (UL®) Recognized

Applications/Uses

·	Computers: Desktop, Workstation, Server
·	Controllers
·	Critical µP Monitoring
·	Embedded Systems
·	Intelligent Instruments
·	Portable Battery-Powered Equipment

Diagram

MAX801L, MAX801M, MAX801N, MAX808L, MAX808M, MAX808N: Typical Operating Circuit
Typical Operating Circuit

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