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General Description

The MAX921–MAX924 single, dual, and quad micropower, 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.

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

Applications

?? Battery-Powered Systems

?? Threshold Detectors

?? Window Comparators

?? Oscillator Circuits