LM339 is a voltage comparator IC from LMx39x series and is manufactured by many industries. The devices consist of four independent voltage comparators that are designed to operate from a single power supply. Also operation from dual supplies is possible, as long as the difference between the two supplies is 2 V to 36 V.

Features:

• Four individually operated voltage comparators
• Low noise interference among comparators
• Single Supply Operation: +3.0 V to +36 V
• Dual  Supply Operation: +18V and -18V
• Low Input Bias Current: 25 nA
• Low Input Offset Current: ±5.0 nA
• Low Input Offset Voltage
• Input Common Mode Voltage Range to GND
• Low Output Saturation Voltage: 130 mV @ 4.0 mA
• TTL and CMOS compatible
• ESD Clamps on the inputs increase reliability without affecting device operation
• Pb−Free, Halogen Free/BFR Free and RoHS compliant

LM339 is used in applications where a comparison between two voltage signals is required. In addition with four of those comparators on board the device can compare four pairs of voltage signals at a time which comes in handy in some applications. The comparator is popular among makers and engineers for being low cost and good performance. The device response is also fast enough to satisfy many applications.

Applications

• Oscillators
• Voltage comparators
• Peak detectors
• Logic voltage translation
• Power supervision
• Industrial
• Measuring instruments
• Automotive