LM339 is a voltage comparator IC manufactured by many industries. It comes from the LMx39x series. It comprises four different voltage comparators, which are designed to operate from a single power supply. It can run in a dual supplier as long as the difference between the two supplies is 36V and 2V.
It is primarily used in applications where one wants to compare the signals of different voltages. Besides the comparators on the device, it can also compare four pairs of a signal coming in at a time. The comparator is a common item in the market for its excellent performance and low cost. This is the device to go for if you are looking for a fast IC to satisfy different applications.
LM339 datasheet
According to its datasheet, some of the main specs of the IC are:
- Low input offset voltage
- Low input offset current
- Low input bias current
- Low output saturation voltage
- Compatible with CMOS and TTL
- Low noise interference among comparators
- Single supply operation
- Dual supply operation
- Input common-mode voltage range
The following are the key application areas for the IC:
- Automotive
- Industrial
- Measuring instruments
- Power supervision
- Peak detectors
- Logic voltage translation
- Voltage comparators
- Oscillators
LM339 pinout
LM339 has 14 pins. Pin 1 is the output pin of comparator one, and pin 2 is the output pin of comparator 2. Pin 3 is the Vcc which is the power supply. Pin 2,6, 8 and 10 are the negative pins of the comparators, while pins 5,7,9 and 11 are the positive pins of the comparators. Pin 12 is the ground pin. Pin 13 is the output of comparator four, and pin 14 is the output of comparator 3.
LM339 Equivalents and Replacement Details
The equivalents of LM339 are LM311, LM2901, LM239, LM139, LM397 and LM324. Even if the peers of the IC could be used interchangeably, it is advisable to be keen on the pinout since they might differ.
