The MAX985/MAX986/MAX989/MAX990/MAX993/MAX994 single/dual/quad micropower comparators feature low-voltage operation and rail-to-rail inputs and outputs. Their operating voltages range from 2.5V to 5.5V, making them ideal for both 3V and 5V systems. These comparators also operate with ±1.25V to ±2.75V dual supplies. They consume only 11μA of supply current while achieving a 300ns propagation delay. Input bias current is typically 1.0pA, and input offset voltage is typically 0.5mV. Internal hysteresis ensures clean output switching, even with slow-moving input signals. The output stage's unique design limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. The MAX985/MAX989/MAX993 have a push-pull output stage that sinks as well as sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX986/MAX990/MAX994 have an open-drain output stage that can be pulled beyond VCC to 6V (max) above VEE. These open-drain versions are ideal for level translators and bipolar to single-ended converters. The single MAX985 is available in a chip-scale package (UCSP), significantly reducing the required PC board area. The single MAX985/MAX986EXK are available in 5-pin SC70 packages and the dual MAX989/MAX990 are available in 8-pin SOT23 packages. 
Feature
 
 
  
  - 11μA Quiescent Supply Current 
 
  - 2.5V to 5.5V Single-Supply Operation 
 
  - Common-Mode Input Voltage Range Extends 250mV Beyond the Rails 
 
  - 300ns Propagation Delay 
 
  - Push-Pull Output Stage Sinks and Sources 8mA Current (MAX985/MAX989/MAX993) 
 
  - Open-Drain Output Voltage Extends Beyond VCC (MAX986/MAX990/MAX994) 
 
  - Unique Output Stage Reduces Output Switching Current, Minimizing Overall Power Consumption 
 
  - 80μA Supply Current at 1MHz Switching Frequency 
 
  - No Phase Reversal for Overdriven Inputs 
 
  - Available in Space-Saving Packages: 
   
 
    - UCSP (MAX985) 
 
    - SOT23 (MAX985/MAX986/MAX989/MAX990) 
 
    - μMAX? (MAX989/MAX990) 
 
   
  
 
 
  
Applications
 
 
 
  - Digital-Line Receivers
 
  - Ground/Supply Sensing
 
  - IR Receivers
 
  - Level Translators
 
  - Mobile Communications
 
  - Portable Battery-Powered Systems
 
  - Threshold Detectors
 
  - Window Comparators
 
  - Zero-Crossing Detectors