BUY LM392N https://www.utsource.net/itm/p/1431229.html
Low Power Operational Amplifier/Voltage Comparator
Description: Low Power Dual Comparator Features: Low Power Consumption Wide Supply Voltage Range Low Input Bias Current Low Input Offset Voltage Outputs Source/Sink up to 20mA TTL/CMOS Compatible Inputs Differential Input Voltage Range Equal to the Power Supply Voltage Output Voltage Compatible with TTL, DTL, ECL, MOS and CMOS Application: Voltage Comparators Window Comparators Pulse Generators Zero Crossing Detectors Hysteresis Controllers Schmitt Triggers Timers Level Detectors (For reference only)