icl7665aesat Maxim Integrated Products, Inc., icl7665aesat Datasheet
icl7665aesat
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icl7665aesat Summary of contents
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Rev 2; 8/97 Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection _______________General Description The ICL7665 warns microprocessors ( Ps) of overvolt- age and undervoltage conditions. It draws a typical operating current of only 3µA. The trip points and hys- teresis ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection ABSOLUTE MAXIMUM RATINGS Supply Voltage (Note 1) .........................................-0.3V to +18V Output Voltages OUT1 and OUT2 (with respect to GND) (Note 1) ..........................-0.3V to +18V Output Voltages HYST1 and HYST2 (with respect to V+) ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection ELECTRICAL CHARACTERISTICS (continued) ( +25°C, unless otherwise noted.) A PARAMETER SYMBOL Output Leakage Current I , OLK I HLK V Saturation OUT1 Voltage V Saturation HYST1 Voltage V Saturation ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection AC OPERATING CHARACTERISTICS ( +25°C, unless otherwise noted.) A PARAMETER SYMBOL t SO1d t Output Delay Time, SH1d Input Going High t SO2d t SH2d t SO1d t Output ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted.) A OUT1 SATURATION VOLTAGE AS A FUNCTION OF OUTPUT CURRENT ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection 1 OUT1 2 HYST1 INPUT 3 SET1 4 GND 1.6V 1.0V Figure 1. Test Circuit _______________Detailed Description As shown in the block diagram of Figure 2, the Maxim ICL7665 combines a 1.3V reference ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection V V+ IN1 OUT1 OUT2 R21 ICL7665 SET1 SET2 R11 OUT1 V IN1 V TRIP1 OUT2 V IN2 Figure 3. Simple Threshold Detector Basic Over/Undervoltage Detection Circuits Figures 3, 4, and 5 show ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection V IN R31 V+ HYST1 HYST2 R21 ICL7665 SET1 SET2 OVERVOLTAGE OUT1 OUT2 GND R11 OUT1 OUT2 Figure 5. Threshold Detector ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection Combination Low-Battery Warning and Low-Battery Disconnect Nickel cadmium (NiCd) batteries are excellent recharge- able power sources for portable equipment, but care must be taken to ensure that NiCd batteries are not damaged by ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection +5V SUPPLY V+ HYST1 HYST2 324k 13M 5% ICL7665 SET1 SET2 OVERVOLTAGE DETECTOR 100k OUT1 OUT2 V 5.55V U V 5.45V L Figure 6. Fault Monitor for a Single Supply R31 HYST1 R21 ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection LINE-POWERED +5V INPUT 100k 2.4M 220 Figure 11. Battery Switchover Circuit TEMPERATURE SENSOR R3 (GENERAL 470k PURPOSE NPN TRANSISTOR) R1, 1M HIGH- TEMPERATURE LIMIT ADJUSTMENT Figure 12. Simple High/Low Temperature Alarm ______________________________________________________________________________________ Q1 ...
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Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection _______________________SCR Latchup Like all junction-isolated CMOS circuits, the ICL7665 has an inherent four-layer or SCR structure that can be triggered into destructive latchup under certain con- ditions. Avoid destructive latchup by following these ...