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MAX978：Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power Comparators

The MAX976/MAX978/MAX998 dual/quad/single, high-speed, 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 common-mode 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.

Key Features Single-Supply Operation Down to 2.7V 20ns Propagation Delay 225µA Supply Current 1nA Shutdown Supply Current Rail-to-Rail Outputs Ground-Sensing Inputs Internal Hysteresis Ensures Clean Switching Available in Space-Saving Packages SOT23 (MAX998) µMAX (MAX976) QSOP (MAX978)

MAX976, MAX978, MAX998: Typical Operating Circuit Applications/Uses 3V Systems Battery-Powered Applications Digital-Line Receivers IR Receivers Threshold Detectors/Discriminators

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• MAX978.pdf

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