MAX998

19-1299; Rev 3; 3/09 MAX976/MAX978/MAX998 Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power Comparators ________________General Description The MAX976/MAX978/MAX998 dual/quad/single, highspeed, low-power comparators are optimized for +3V/+5V single-supply applications. They achieve a 20ns propagation delay while consuming only 225µA supply current per comparator. The MAX998 features a low-power shutdown mode that places the output in a high-impedance state and reduces supply current to 1nA. The MAX976/MAX978/MAX998 inputs have a commonmode voltage range that extends 200mV below ground. Their outputs are capable of rail-to-rail operation without external pullup circuitry, making these devices ideal for interface with CMOS/TTL logic. All inputs and outputs can tolerate a continuous short-circuit fault condition to either rail. The comparators’ internal hysteresis ensures clean output switching, even with slow-moving input signals. For space-critical applications, the single MAX998 is available in a 6-pin SOT23 package, the dual MAX976 is available in an 8-pin µMAX® package, and the quad MAX978 is available in a 16-pin QSOP package. ________________________Applications Battery-Powered Systems Threshold Detectors/Discriminators 3V Systems IR Receivers Digital Line Receivers ___________Typical Operating Circuit ____________________________Features ♦ Single-Supply Operation Down to 2.7V ♦ 20ns Propagation Delay ♦ 225µA Supply Current ♦ 1nA Shutdown Supply Current ♦ ...