MAX8211/MAX8212 19-0539 Rev 5 9/08 Microprocessor Voltage Monitors with Programmable Voltage Detection General Description Features Maxims MAX8211 and MAX8212 are CMOS micropower P Power-Fail Warning voltage detectors that warn microprocessors (Ps) of Improved 2nd Source for ICL8211/ICL8212 power failures. Each contains a comparator, a 1.5V Low-Power CMOS Design bandgap reference, and an open-drain n-channel output driver. Two external resistors are used in conjunction with 5A Quiescent Current the internal reference to set the trip voltage to the desired On-Board Hysteresis Output level. A hysteresis output is also included, allowing the user 40mV Threshold Accuracy (3.5%) to apply positive feedback for noise-free output switching. 2.0V to 16.5V Supply-Voltage Range The MAX8211 provides a 7mA current-limited output sink whenever the voltage applied to the threshold pin is less Define Output Current Limit (MAX8211) than the 1.5V internal reference. In the MAX8212, a voltage High Output Current Capability (MAX8212) greater than 1.5V at the threshold pin turns the output stage on (no current limit). Ordering Information The CMOS MAX8211/MAX8212 are plug-in replacements PIN - PART TEMP RANGE for the bipolar ICL8211/ICL8212 in applications where the PAC K A G E maximum supply voltage is less than 16.5V. They offer sev- MAX8211CPA -0C to +70C 8 Plastic DIP eral performance advantages, including reduced supply current, a more tightly controlled bandgap reference, and MAX8211CSA -0C to +70C 8 SO more available current from the hysteresis output. MAX8211CUA -0C to +70C 8 MAX MAX8211CTY -0C to +70C 8 TO-99 Applications MAX8211EPA -40C to +85C 8 Plastic DIP MAX8211ESA -40C to +85C 8 SO P Voltage Monitoring MAX8211EJA -40C to +85C 8 CERDIP Undervoltage Detection MAX8211ETY -40C to +85C 8 TO-99 Overvoltage Detection MAX8211MJA -55C to +125C 8 CERDIP** Battery-Backup Switching Ordering Information continued on last page. Power-Supply Fault Monitoring *Contact factory for dice specifications. **Contact factory for availability and processing to MIL-STD-883. Low-Battery Detection Pin Configurations Typical Operating Circuit V+ TOP VIEW R3 V+ N.C. 1 8 V+ HYST P OUT 7 N.C. NMI HYST 2 R2 MAX8211 MAX8211 MAX8212 3 THRESH 6 N.C. THRESH GND 4 OUT 5 GND R1 DIP/SO LOGIC-SUPPLY UNDERVOLTAGE DETECTOR Pin Configurations continued at end of data sheet. (DETAILED CIRCUIT DIAGRAMFIGURE 5) Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Microprocessor Voltage Monitors with Programmable Voltage Detection ABSOLUTE MAXIMUM RATINGS Supply Voltage .......................................................-0.5V to +18V 8-Pin CERDIP (derate 8.00mW/C above +70C)..........640mW Output Voltage .......................................................-0.5V to +18V 8-Pin TO-99 (derate 6.67mW/C above +70C).............533mW Hysteresis...................+0.5V to -18V with respect to (V+ + 0.5V) Operating Temperature Ranges Threshold Input Voltage ...............................-0.5V to (V+ + 0.5V) MAX821 C .......................................................0C to +70C Current into Any Terminal.................................................50mA MAX821 E .....................................................-40C to +85C Continuous Power Dissipation (T = +70C) MAX821 M ..................................................-55C to +125C A 8-Pin Plastic DIP (derate 9.09mW/C above +70C) .....727mW Storage Temperature Range .............................-65C to +150C 8-Pin SO (derate 5.88mW/C above +70C)..................471mW Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V+ = 5V, T = +25C, unless otherwise noted.) A MAX8211 MAX8212 PARAMETER SYMBOL CONDITIONS UNITS MIN TYP MAX MIN TYP MAX T = +25C 515 515 2V V+ 16.5V, A Supply Current I+ A GND V V+ TH T = T to T 20 20 A MIN MAX V+ = 16.5V, I = 4mA OUT T = +25C 1.11 1.19 1.11 1.19 A V+ = 2V, I = 500A OUT Threshold Trip Voltage V V TH V+ = 16.5V, I = 3mA OUT T = T to T 1.05 1.25 1.05 1.25 A MIN MAX V+ = 2.2V, I = 500A OUT Threshold Voltage I = 4mA, OUT Disparity between Output V 0.1 0.1 mV THP I = 1mA HYST and Hysteresis Output T = +25C 2.0 16.5 2.0 16.5 Guaranteed Operating A V V SUPP Supply Voltage Range T = T to T 2.2 16.5 2.2 16.5 A MIN MAX Typical Operating V 1.5 16.5 1.5 16.5 V SUPP Supply Voltage Range Threshold Voltage V See Figure 4 -200 -200 ppm/C TH/T Temperature Coefficient Variation of Threshold V V+ = 4.5V to 5.5V 1.0 0.2 mV TH Voltage with Supply Voltage 0V V V+, T = +25C 0.01 10 0.01 10 TH A Threshold Input Current I nA TH T = T to T 20 20 A MIN MAX V = 16.5V, V = 1.0V 10 OUT TH V = 16.5V, V = 1.3V 10 T = T to T , OUT TH A MIN MAX C/E temp. ranges V = 5V, V = 1.0V 1 OUT TH V = 5V, V = 1.3V 1 OUT TH Output Leakage Current I A LOUT V = 16.5V, V = 0.9V 30 OUT TH V = 16.5V, V = 1.3V 30 T = T to T , OUT TH A MIN MAX M temp. range V = 5V, V = 0.9V 10 OUT TH V = 5V, V = 1.3V 10 OUT TH 2 MAX8211/MAX8212