MAX812 Datasheet | Maxim Integrated

Description The MAX811/MAX812 are low-power microprocessor (μP) supervisory circuits used to monitor power supplies in μP and digital systems. They provide excellent circuit reliability and low cost by eliminating external ponents and adjustments when used with 5Vpowered or 3V-powered circuits. The MAX811/MAX812 also provide a debounced manual reset input. These devices perform a single function: They assert a reset signal whenever the VCC supply voltage falls below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. The only difference between the two devices is that the MAX811 has an active-low RESET output (which is guaranteed to be in the correct state for VCC down to 1V), while the MAX812 has an active-high RESET output. The reset parator is designed to ignore fast transients on VCC. Reset thresholds are available for operation with a variety of supply voltages. Low supply current makes the MAX811/MAX812 ideal for use in portable equipment. The devices e in a 4-pin SOT143 package. Applications - - puters - - Controllers - - Intelligent Instruments - - Critical μP and μC Power Monitoring - - Portable/Battery-Powered Equipment Typical Operating Circuit VCC MAX811 MAX812 RESET MR (RESET) VCC µP RESET INPUT PUSHBUTTON SWITCH ( ) ARE FOR MAX812 4-Pin μP Voltage Monitors with Manual Reset Input Benefits and Features - - Integrated Voltage Monitor Increases System Robustness with Added Manual Reset - Precision Monitoring of 3V, 3.3V, and 5V Power-Supply Voltages - 140ms Min Power-On-Reset Pulse Width - RESET Output (MAX811), RESET Output (MAX812) - Guaranteed Over Temperature - Guaranteed RESET Valid to VCC = 1V (MAX811) - Power-Supply Transient Immunity - - Saves Board Space - No External ponents - 4-Pin SOT143 Package - - Low Power Consumption Simplifies Power-Supply Requirements - 6μA Supply Current Ordering Information PART- TEMP RANGE PIN-PACKAGE MAX811_EUS-T -40°C to +85°C 4...