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MAX812 Dataheets PDF



Part Number MAX812
Manufacturers Maxim Integrated
Logo Maxim Integrated
Description 4-Pin uP Voltage Monitors
Datasheet MAX812 DatasheetMAX812 Datasheet (PDF)

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 re.

  MAX812   MAX812



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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 ●● 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 Components • 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 SOT143 MAX812_EUS-T -40°C to +85°C 4 SOT143 *This part offers a choice of five different reset threshold voltages. Select the letter corresponding to the desired nominal reset threshold voltage, and insert it into the blank to complete the part number. Devices are available in both leaded and lead(Pb)-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. RESET THRESHOLD SUFFIX VOLTAGE (V) L 4.63 M 4.38 T 3.08 S 2.93 R 2.63 Pin Configuration TOP VIEW GND 1 MAX811 MAX812 4 VCC (RESET) RESET 2 3 MR SOT143 ( ) ARE FOR MAX812 NOTE: SEE PACKAGE INFORMATION FOR MARKING INFORMATION. 19-0411; Rev 6; 5/18 MAX811/MAX812 4-Pin μP Voltage Monitors with Manual Reset Input Absolute Maximum Ratings Terminal Voltage (with respect to GND) VCC.....................................................................-0.3V to 6.0V All Other Inputs..................................... .


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