General Description

The MAX921–MAX924 single, dual, and quad micropower, low-voltage comparators feature the lowest power consumption available. These comparators draw less than 4µA supply current over temperature (MAX921/MAX922), and include an internal 1.182V ±1% voltage reference, programmable hysteresis, and TTL/CMOS outputs that sink and source current.

Ideal for 3V or 5V single-supply applications, the MAX921–MAX924 operate from a single +2.5V to +11V supply (or a ±1.25V to ±5V dual supply), and each comparator’s input voltage range swings from the negative supply rail to within 1.3V of the positive supply.

Features

♦ µMAX® Package—Smallest 8-Pin SO

   (MAX921/MAX922/MAX923)

♦ Ultra-Low 4µA Max Quiescent Current

   Over Extended Temp. Range (MAX921)

♦ Power Supplies:

   Single +2.5V to +11V

   Dual ±1.25V to ±5.5V

♦ Input Voltage Range Includes Negative Supply

♦ Internal 1.182V ±1% Bandgap Reference

♦ Adjustable Hysteresis

♦ TTL/CMOS-Compatible Outputs

♦ 12µs Propagation Delay (10mV Overdrive)

♦ No Switching Crowbar Current

♦ 40mA Continuous Source Current

Applications

   Battery-Powered Systems

   Threshold Detectors

   Window Comparators

   Oscillator Circuits