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MAX8211

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仕様・特性

19-0539; Rev 5; 9/08 Microprocessor Voltage Monitors with Programmable Voltage Detection ____________________________Features Maxim’s MAX8211 and MAX8212 are CMOS micropower voltage detectors that warn microprocessors (µPs) of power failures. Each contains a comparator, a 1.5V bandgap reference, and an open-drain n-channel output driver. Two external resistors are used in conjunction with the internal reference to set the trip voltage to the desired level. A hysteresis output is also included, allowing the user to apply positive feedback for noise-free output switching. The MAX8211 provides a 7mA current-limited output sink whenever the voltage applied to the threshold pin is less than the 1.5V internal reference. In the MAX8212, a voltage greater than 1.5V at the threshold pin turns the output stage on (no current limit). o µP Power-Fail Warning o Improved 2nd Source for ICL8211/ICL8212 o Low-Power CMOS Design The CMOS MAX8211/MAX8212 are plug-in replacements for the bipolar ICL8211/ICL8212 in applications where the maximum supply voltage is less than 16.5V. They offer several performance advantages, including reduced supply current, a more tightly controlled bandgap reference, and more available current from the hysteresis output. o o o o o o 5µA Quiescent Current On-Board Hysteresis Output ±40mV Threshold Accuracy (±3.5%) 2.0V to 16.5V Supply-Voltage Range Define Output Current Limit (MAX8211) High Output Current Capability (MAX8212) _______________Ordering Information TEMP RANGE PINPACKAGE MAX8211CPA -0°C to +70°C 8 Plastic DIP MAX8211CSA -0°C to +70°C 8 SO MAX8211CUA -0°C to +70°C 8 µMAX MAX8211CTY -0°C to +70°C 8 TO-99 MAX8211EPA -40°C to +85°C 8 Plastic DIP µP Voltage Monitoring MAX8211ESA -40°C to +85°C 8 SO Undervoltage Detection MAX8211EJA -40°C to +85°C 8 CERDIP MAX8211ETY -40°C to +85°C 8 TO-99 MAX8211MJA -55°C to +125°C 8 CERDIP** ________________________Applications Overvoltage Detection Battery-Backup Switching PART Ordering Information continued on last page. *Contact factory for dice specifications. **Contact factory for availability and processing to MIL-STD-883. Power-Supply Fault Monitoring Low-Battery Detection _________________Pin Configurations ___________Typical Operating Circuit V+ TOP VIEW R3 V+ N.C. 1 HYST 2 THRESH 3 OUT 4 8 7 N.C. 6 N.C. 5 MAX8211 MAX8212 V+ GND HYST OUT R2 µP NMI MAX8211 THRESH GND R1 DIP/SO Pin Configurations continued at end of data sheet. LOGIC-SUPPLY UNDERVOLTAGE DETECTOR (DETAILED CIRCUIT DIAGRAM—FIGURE 5) ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX8211/MAX8212 ________________General Description

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