General Description
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 with out 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.

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)

Applications
   Battery-Powered Systems
   Threshold Detectors/Discriminators
   3V Systems
   IR Receivers
   Digital Line Receivers