BUY LM311DR SOIC-8 https://www.utsource.net/itm/p/8646916.html

Description: The LM311DR is a single comparator with an open-collector output. It is designed to operate from a single supply over a wide range of voltages. Features: Wide supply voltage range: 3 V to 32 V Low supply current drain: 0.8 mA Low input bias current: 25 nA Low input offset voltage: 2 mV High input impedance: 10 GΩ Output can drive up to 25 mA Applications: Voltage monitoring Temperature sensing Motor speed control Logic level conversion Pulse width modulation Pulse position modulation Switch debouncing (For reference only)