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MAX803R Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX803R Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 8 page 19-0344; Rev 8; 12/12 MAX803/MAX809/MAX810 3-Pin Microprocessor Reset Circuits For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. General Description The MAX803/MAX809/MAX810 are microprocessor (µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external compo- nents and adjustments when used with +5V, +3.3V, +3.0V, or +2.5V powered circuits. These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset thresh- old. Reset thresholds suitable for operation with a vari- ety of supply voltages are available. The MAX803 has an open-drain output stage, while the MAX809/MAX810 have push-pull outputs. The MAX803’s open-drain RESET output requires a pullup resistor that can be connected to a voltage higher than VCC. The MAX803/MAX809 have an active-low RESET output, while the MAX810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1V. Low supply current makes the MAX803/MAX809/ MAX810 ideal for use in portable equipment. The MAX803 is available in a 3-pin SC70 package, and the MAX809/MAX810 are available in 3-pin SC70 or SOT23 packages. Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment Automotive ____________________________Features o Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages o Fully Specified Over Temperature o Available in Three Output Configurations Open-Drain RESET Output (MAX803) Push-Pull RESET Output (MAX809) Push-Pull RESET Output (MAX810) o 140ms min Power-On Reset Pulse Width o 12µA Supply Current o Guaranteed Reset Valid to VCC = +1V o Power Supply Transient Immunity o No External Components o 3-Pin SC70 and SOT23 Packages TOP VIEW RESET (RESET) 1 GND VCC MAX803 MAX809 MAX810 SC70-3/SOT23-3 2 3 ( ) ARE FOR MAX810. MAX803 AVAILABLE IN SC70-3 ONLY. MAX803 MAX809 VCC VCC RPULLUP* RESET RESET INPUT GND VCC GND *MAX803 ONLY µP Pin Configuration Typical Operating Circuit Note: These parts are offered in 2.5k reels, and must be ordered in 2.5k increments. Insert the desired suffix letter from the Selector Guide into the blank to complete the part number. All versions of these products may not be available at the time of announcement. Contact factory for availability. Devices are available in both leaded and lead-free packaging. + Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. Ordering Information PART TEMP RANGE PIN-PACKAGE MAX803_EXR-T -40°C to +125°C 3 SC70 MAX803_EXR+T -40°C to +125°C 3 SC70 MAX803_EXR/V+ -40°C to +125°C 3 SC70 MAX809_EXR-T -40°C to +125°C 3 SC70 MAX809_EXR+T -40°C to +125°C 3 SC70 MAX809_EUR-T -40°C to +105°C 3 SOT23 MAX809_EUR+T -40°C to +105°C 3 SOT23 MAX810_EXR-T -40°C to +125°C 3 SC70 MAX810_EXR+T -40°C to +125°C 3 SC70 MAX810_EUR-T -40°C to +105°C 3 SOT23 MAX810_EUR+T -40°C to +105°C 3 SOT23 |
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