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MAX921 Dataheets PDF



Part Number MAX921
Manufacturers Maxim
Logo Maxim
Description Ultra Low-Power / Single/Dual-Supply Comparators
Datasheet MAX921 DatasheetMAX921 Datasheet (PDF)

Click here for production status of specific part numbers. MAX921–MAX924 Ultra Low-Power, Single/Dual-Supply Comparators General Description The MAX921–MAX924 single, dual, and quad micro-power, low-voltage comparators feature the lowest power consumption available. These comparators draw less than 4μA supply current over temperature (MAX921/ MAX922), and include an internal 1.182V ±1% voltage reference, programmable hysteresis, and TTL/CMOS outputs that sink and source current. Ideal for 3V o.

  MAX921   MAX921


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Click here for production status of specific part numbers. MAX921–MAX924 Ultra Low-Power, Single/Dual-Supply Comparators General Description The MAX921–MAX924 single, dual, and quad micro-power, low-voltage comparators feature the lowest power consumption available. These comparators draw less than 4μA supply current over temperature (MAX921/ MAX922), and include an internal 1.182V ±1% voltage reference, programmable hysteresis, and TTL/CMOS outputs that sink and source current. Ideal for 3V or 5V single-supply applications, the MAX921– MAX924 operate from a single +2.5V to +11V supply (or a ±1.25V to ±5V dual supply), and each comparator’s input voltage range swings from the negative supply rail to within 1.3V of the positive supply. The MAX921–MAX924’s unique output stage continuously sources as much as 40mA. And by eliminating powersupply glitches that commonly occur when comparators change logic states, the MAX921–MAX924 minimize parasitic feedback, which makes them easier to use. The single MAX921 and dual MAX923 provide a unique and simple method for adding hysteresis without feedback and complicated equations, simply by using the HYST pin and two resistors. PART INTERNAL 1% PRECISION REFERENCE COMPARATORS PER PACKAGE INTERNAL HYSTERESIS PACKAGE MAX921 MAX922 MAX923 MAX924 Yes No Yes Yes 1 Yes 8-Pin DIP/SO/μMAX 2 No 8-Pin DIP/SO/μMAX 2 Yes 8-Pin DIP/SO/μMAX 4 No 16-Pin DIP/SO/μMAX Applications ●● Battery-Powered Systems ●● Threshold Detectors ●● Window Comparators ●● Oscillator Circuits μMAX is a registered trademark of Maxim Integrated Products, Inc. Features ●● μMAX® Package—Smallest 8-Pin SO (MAX921/MAX922/MAX923) ●● Ultra-Low 4μA Max Quiescent Current Over Extended Temp. Range (MAX921) ●● Power Supplies: • Single +2.5V to +11V • Dual ±1.25V to ±5.5V ●● Input Voltage Range Includes Negative Supply ●● Internal 1.182V ±1% Bandgap Reference ●● Adjustable Hysteresis ●● TTL/CMOS-Compatible Outputs ●● 12μs Propagation Delay (10mV Overdrive) ●● No Switching Crowbar Current ●● 40mA Continuous Source Current Ordering Information PART MAX921CPA MAX921CSA MAX921CUA MAX921C/D MAX921EPA MAX921ESA MAX921MJA TEMP RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 8 Plastic DIP 8 SO 8 μMAX Dice* 8 Plastic DIP 8 SO 8 CERDIP Ordering Information continued at end of data sheet. *Dice are **Contact tfeasctteodryaftoTr Aav=ai+la2b5il°iCty,. DC parameters only. Typical Operating Circuit VIN 7 V+ 3 IN+ 4 IN- OUT 8 5 HYST 6 REF V2 MAX921 GND 1 THRESHOLD DETECTOR 19-0115; Rev 7; 1/20 MAX921–MAX924 Ultra Low-Power, Single/Dual-Supply Comparators Absolute Maximum Ratings V+ to V-, V+ to GND, GND to V-............................... -0.3V, +12V Inputs Current, IN_+, IN_-, HYST..............................................20mA Voltage, IN_+, IN_-, HYST..............(V+ + 0.3V) to (V- – 0.3V) Outputs Current, REF...................................................................20mA Current, OUT_.................................................................50mA Voltage, REF...................................(V+ + 0.3V) to (V- – 0.3V) Voltage, OUT_ (MAX921/924).... (V+ + 0.3V) to (GND – 0.3V) Voltage OUT_ (MAX922/923)..........(V+ + 0.3V) to (V- – 0.3V) OUT_ Short-Circuit Duration (V+ ≤ 5.5V)...............Continuous Continuous Power Dissipation (TA = +70°C) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)...727mW 8-Pin SO (derate 5.88mW/°C above +70°C)................471mW 8-Pin μMAX (derate 4.1mW/°C above +70°C).............330mW 8-Pin CERDIP (derate 8.00mW/°C above +70°C).......640mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C).... 842mW 16-Pin SO (derate 8.70mW/°C above +70°C)..............696mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C)...800mW Operating Temperature Ranges: MAX92_C_ _.......................................................0°C to +70°C MAX92_E_ _................................................... -40°C to +85°C MAX92_MJ_.................................................. -55°C to +125°C Storage Temperature Range............................. -65°C to +150°C Lead Temperature (soldering, 10s).................................. +300°C 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 : 5V OPERATION (V+ = 5V, V- = GND = 0V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER POWER REQUIREMENTS Supply Voltage Range Supply Current COMPARATOR Input Offset Voltage Input Leakage Current .


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