LM339 is similar to an operational amplifier with non-adjustable gain. Each comparator has two input terminals and one output terminal. One of the two input terminals is called the non-inverting input terminal, represented by "+", and the other is called the inverting input terminal, represented by "-".
When used to compare two voltages, add a fixed voltage to any input terminal as a reference voltage (also called threshold level, which can select any point in the LM339 input common mode range), and add a signal voltage to be compared at the other end .
When the "+" terminal voltage is higher than the "-" terminal, the output tube is cut off, which is equivalent to an open circuit at the output terminal. When the "-" terminal voltage is higher than the "+" terminal, the output tube is saturated, which is equivalent to the output terminal connected to a low potential
Current consumption: Icc=1.3mA
Single power supply: 2～36V
Dual power supply: ±1～±18V
Input offset voltage: VIO=±2mV
Common mode voltage range Vic=0～Vcc-1.5V
Package: DIP14
Package include:
10pcs*LM339