General Description

The MAX917–MAX920 nanopower comparators in space-saving SOT23 packages feature Beyond-the-Rails? inputs and are guaranteed to operate down to +1.8V. The MAX917/MAX918 feature an on-board 1.245V ±1.5 reference and draw an ultra-low supply current of only 750nA, while the MAX919/MAX920 (without reference) require just 380nA of supply current. These features make the MAX917–MAX920 family of comparators ideal for all 2-cell battery applications, including monitoring/management.

Features

? Ultra-Low Supply Current

?? 380nA per Comparator (MAX919/MAX920)

?? 750nA per Comparator with Reference

?? (MAX917/MAX918)

? Guaranteed to Operate Down to +1.8V

? Internal 1.245V ±1.5 Reference

?? (MAX917/MAX918)

? Input Voltage Range Extends 200mV

?? Beyond-the-Rails

? CMOS Push-Pull Output with ±8mA Drive

?? Capability (MAX917/MAX919)

? Open-Drain Output Versions Available

?? (MAX918/MAX920)

? Crowbar-Current-Free Switching

? Internal Hysteresis for Clean Switching

? No Phase Reversal for Overdriven Inputs

? Space-Saving SOT23 Package

Applications

?? 2-Cell Battery Monitoring/Management

?? Ultra-Low-Power Systems

?? Mobile Communications

?? Notebooks and PDAs

?? Threshold Detectors/Discriminators

?? Sensing at Ground or Supply Line

?? Telemetry and Remote Systems

?? Medical Instruments