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 MAX978EEE is available in a 16-pin QSOP package. 
Feature
 
 
  
  - 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
 
 
 
  - 3V Systems
 
  - Battery-Powered Applications
 
  - Digital-Line Receivers
 
  - IR Receivers
 
  - Threshold Detectors/Discriminators