MAX812

Click here for production status of specific part numbers. MAX811/MAX812 General 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 components 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 comparator 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 come in a 4-pin SOT143 package. Applications ●● Computers ●● Controllers ●● Intelligent Instruments ●● Critical μP and μC Power Monitoring ●● Portable/Battery-Powered Equipment Typical Operating Circuit VCC VCC MAX811 MAX812 RESET MR (RESET) GND VCC µP RESET INPUT GND PUSHBUTTON SWITCH ( ) ARE FOR MAX812 4-Pin μP Voltage Monitors with Manual Reset Input Benefits and Features ●●...