MAX705 Datasheet | Maxim Integrated

Click here for production status of specific part numbers. MAX705- MAX708/MAX813L Low-Cost, μP Supervisory Circuits General Description The MAX705- MAX708/MAX813L microprocessor (µP) supervisory circuits reduce the plexity and number of ponents required to monitor power-supply and battery functions in µP systems. These devices significantly improve system reliability and accuracy pared to separate ICs or discrete ponents. The MAX705/MAX706/MAX813L provide four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds. 3) A 1.25V threshold detector for power-fail warning, lowbattery detection, or for monitoring a power supply other than +5V. 4) An active-low manual-reset input. The MAX707/MAX708 are the same as the MAX705/ MAX706, except an active-high reset is substituted for the watchdog timer. The MAX813L is the same as the MAX705, except RESET is provided instead of RESET. Two supply-voltage monitor levels are available: The MAX705/MAX707/MAX813L generate a reset pulse when the supply voltage drops below 4.65V, while the MAX706/ MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO, and µMAX® packages. Applications - - puters - - Controllers - - Intelligent Instruments - - Critical μP Power Monitoring Pin Configurations appear at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. Benefits and Features - - Supervisory-Function Integration Significantly Improves System Reliability While Reducing Board Space - μMAX Package - Guaranteed RESET Valid at VCC = 1V -- 200ms Reset Pulse Width -- Debounced TTL/CMOS-patible Manual- Reset Input -- Active-High Reset Output (MAX707/MAX708/ MAX813L) - Precision-Supply Voltage Monitor -- 4.65V (MAX705/MAX707/MAX813L) -- 4.40V (MAX706/MAX708) - Voltage Monitor for Power-Fail or Low-Battery Warning Ordering...