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