LM339 VOLTAGE COMPARATOR IC

LM339 VOLTAGE COMPARATOR IC
LM339 is a voltage comparator IC from the 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.

LM339 Pin Configuration
LM339 is a 14 pin device as shown in above pin diagram. Here we will name the pinout of all four comparators on the chip and describe function of each pin.

Pin Name Description
1 1OUT Output pin of the comparator 1
2 2OUT Output pin of the comparator 2
3 VCC Power supply
4 2IN- Negative input pin of the comparator 2
5 2IN+ Positive input pin of the comparator 2
6 1IN- Negative input pin of the comparator 1
7 1IN+ Positive input pin of the comparator 1
8 3IN- Negative input pin of the comparator 3
9 3IN+ Positive input pin of the comparator 3
10 4IN- Negative input pin of the comparator 4
11 4IN+ Positive input pin of the comparator 4
12 GND GroundFeatures and Electrical Characteristics of LM339
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
Applications