Click here for production status of specific part numbers. MAX921MAX924 Ultra Low-Power, Single/Dual-Supply Comparators General Description Features MAX PackageSmallest 8-Pin SO The MAX921MAX924 single, dual, and quad micro-power, (MAX921/MAX922/MAX923) low-voltage comparators feature the lowest power Ultra-Low 4A Max Quiescent Current consumption available. These comparators draw less Over Extended Temp. Range (MAX921) than 4A supply current over temperature (MAX921/ MAX922), and include an internal 1.182V 1% voltage Power Supplies: Single +2.5V to +11V reference, programmable hysteresis, and TTL/CMOS Dual 1.25V to 5.5V outputs that sink and source current. Input Voltage Range Includes Negative Supply Ideal for 3V or 5V single-supply applications, the MAX921 Internal 1.182V 1% Bandgap Reference MAX924 operate from a single +2.5V to +11V supply (or a 1.25V to 5V dual supply), and each comparators Adjustable Hysteresis input voltage range swings from the negative supply rail TTL/CMOS-Compatible Outputs to within 1.3V of the positive supply. 12s Propagation Delay (10mV Overdrive) The MAX921MAX924s unique output stage continuously No Switching Crowbar Current sources as much as 40mA. And by eliminating power- 40mA Continuous Source Current supply glitches that commonly occur when comparators change logic states, the MAX921MAX924 minimize Ordering Information parasitic feedback, which makes them easier to use. PART TEMP RANGE PIN-PACKAGE The single MAX921 and dual MAX923 provide a unique MAX921CPA 0C to +70C 8 Plastic DIP and simple method for adding hysteresis without feed- MAX921CSA 0C to +70C 8 SO back and complicated equations, simply by using the MAX921CUA 0C to +70C 8 MAX HYST pin and two resistors. MAX921C/D 0C to +70C Dice* MAX921EPA -40C to +85C 8 Plastic DIP MAX921ESA -40C to +85C 8 SO MAX921MJA -55C to +125C 8 CERDIP Ordering Information continued at end of data sheet. *Dice are tested at T = +25C, DC parameters only. A **Contact factory for availability. 8-Pin MAX921 Yes 1 Yes Typical Operating Circuit DIP/SO/MAX 8-Pin V IN MAX922 No 2 No DIP/SO/MAX 7 V+ 8-Pin 3 IN+ MAX923 Yes 2 Yes DIP/SO/MAX OUT 8 16-Pin 4 IN- MAX924 Yes 4 No DIP/SO/MAX 5 HYST Applications MAX921 Battery-Powered Systems 6 REF Threshold Detectors GND V- Window Comparators 2 1 Oscillator Circuits THRESHOLD DETECTOR MAX is a registered trademark of Maxim Integrated Products, Inc. 19-0115 Rev 7 1/20 PART INTERNAL 1% PRECISION REFERENCE COMPARATORS PER PACKAGE INTERNAL HYSTERESIS PACKAGEMAX921MAX924 Ultra Low-Power, Single/Dual-Supply Comparators Absolute Maximum Ratings V+ to V-, V+ to GND, GND to V- .............................. -0.3V, +12V Continuous Power Dissipation (T = +70C) A Inputs 8-Pin Plastic DIP (derate 9.09mW/C above +70C) ..727mW Current, IN +, IN -, HYST .............................................20mA 8-Pin SO (derate 5.88mW/C above +70C) ...............471mW Voltage, IN +, IN -, HYST .............(V+ + 0.3V) to (V- 0.3V) 8-Pin MAX (derate 4.1mW/C above +70C) ............330mW Outputs 8-Pin CERDIP (derate 8.00mW/C above +70C) ......640mW Current, REF ..................................................................20mA 16-Pin Plastic DIP (derate 10.53mW/C above +70C) ... 842mW Current, OUT ................................................................50mA 16-Pin SO (derate 8.70mW/C above +70C) .............696mW Voltage, REF ..................................(V+ + 0.3V) to (V- 0.3V) 16-Pin CERDIP (derate 10.00mW/C above +70C) ..800mW Voltage, OUT (MAX921/924) ... (V+ + 0.3V) to (GND 0.3V) Operating Temperature Ranges: Voltage OUT (MAX922/923) .........(V+ + 0.3V) to (V- 0.3V) MAX92 C ......................................................0C to +70C OUT Short-Circuit Duration (V+ 5.5V) ..............Continuous MAX92 E .................................................. -40C to +85C MAX92 MJ ................................................. -55C to +125C Storage Temperature Range ............................ -65C to +150C 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 : 5V OPERATION (V+ = 5V, V- = GND = 0V, T = T to T , unless otherwise noted.) A MIN MAX PARAMETER CONDITIONS MIN TYP MAX UNITS POWER REQUIREMENTS Supply Voltage Range (Note 1) 2.5 11 T = +25C 2.5 3.2 A MAX921, C/E temp. ranges 4 HYST = REF M temp. range 5 T = +25C 2.5 3.2 A MAX922 C/E temp. ranges 4 M temp. range 5 V Supply Current IN+ = IN- + 100mV T = +25C 3.1 4.5 A MAX923, C/E temp. ranges 6 HYST = REF M temp. range 7.5 T = +25C 5.5 6.5 A MAX924 C/E temp. ranges 8.5 M temp. range 11 COMPARATOR Input Offset Voltage V = 2.5V 10 mV CM C/E temp. ranges 0.01 5 Input Leakage Current (IN-, IN+) IN+ = IN- = 2.5V nA M temp. range 40 Input Leakage Current (HYST) MAX921, MAX923 0.02 nA Input Common-Mode Voltage Range V- V+ 1.3 V Common-Mode Rejection Ratio V- to (V+ 1.3V) 0.1 1.0 mV/V Power-Supply Rejection Ratio V+ = 2.5V to 11V 0.1 1.0 mV/V Voltage Noise 100Hz to 100kHz 20 V RMS Hysteresis Input Voltage Range MAX921, MAX923 REF- 0.05V REF V Overdrive = 10mV 12 Response Time T = +25C, 100pF load s A Overdrive = 100mV 4 Maxim Integrated 2 www.maximintegrated.com