BUY LM339N(40PCS) https://www.utsource.net/itm/p/8647226.html

Description: Quad Comparator Features: - Wide Supply Range: Single Supply: 3V to 32V or Dual Supplies: ±1.5V to ±16V - Low Supply Current Drain: 0.8mA (Typical) - Low Input Bias Current: 25nA (Typical) - Low Input Offset Voltage: 3mV (Typical) - Outputs Can Drive Up to 10 LSTTL Loads - Outputs Source/Sink Up to 20mA - Low Output Offset Voltage: 5mV (Typical) - High Noise Immunity: 0.1V (Typical) Applications: - Temperature Monitoring and Control - Pulse Width Modulation - Motor Speed Control - Time Delay Generation - Logic Level Conversion - Signal Conditioning - Voltage Level Detection (For reference only)