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