Part # MAX811-MAX812T datasheet

Part Manufacturer: Maxim


Part Description: MAX811 812 DS

Part Details:

19-0411; Rev 4; 12/05 4-Pin µP Voltage Monitors with Manual Reset Input MAX811/MAX812 ________________General Description ____________________________Features The MAX811/MAX812 are low-power microprocessor Precision Monitoring of 3V, 3.3V, and 5V (µP) supervisory circuits used to monitor power sup- Power-Supply Voltages plies in µP and digital systems. They provide excellentcircuit reliability and low cost by eliminating external 6µA Supply Current components and adjustments when used with 5V- 140ms Min Power-On Reset Pulse Width; powered or 3V-powered circuits. The MAX811/MAX812 RESET Output (MAX811), RESET Output (MAX812) also provide a debounced manual reset input. These devices perform a single function: They assert a Guaranteed Over Temperature reset signal whenever the VCC supply voltage falls Guaranteed RESET Valid to VCC = 1V (MAX811) below a preset threshold, keeping it asserted for atleast 140ms after V Power-Supply Transient Immunity CC has risen above the reset thresh- old. The only difference between the two devices is that No External Components the MAX811 has an active-low RESET output (which isguaranteed to be in the correct state for V 4-Pin SOT143 Package CC down to 1V), while the MAX812 has an active-high RESET out- _______________Ordering Information put. The reset comparator is designed to ignore fasttransients on VCC. Reset thresholds are available for PART* TEMP RANGE PIN-PACKAGE operation with a variety of supply voltages. MAX811_EUS-T -40°C to +85°C 4 SOT143 Low supply current makes the MAX811/MAX812 ideal MAX812_EUS-T -40°C to +85°C 4 SOT143 for use in portable equipment. The devices come in a *This part offers a choice of five different reset threshold volt- 4-pin SOT143 package. ages. Select the letter corresponding to the desired nominalreset threshold voltage, and insert it into the blank to complete ________________________Applications the part number. Computers Devices are available in both leaded and lead-free packaging.Specify lead-free by replacing "-T" with "+T" when ordering. Controllers RESET THRESHOLD Intelligent Instruments

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MAX811-MAX812T.pdf Datasheet