LM339 pinout | Introduction | Pin Configuration | Features | Rating | Package | Advantages | Applications

Introduction to LM339:


LM339 is a voltage comparator IC from the LMx39x series and is manufactured by many industries. The devices consist of four independent voltage comparator that is 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 between 2V to 36 V.

Basically, LM339 is a comparator IC having four built-in compare, The main purpose of a comparator is to rotate the signal between analog and digital domains. At input terminals the compares the two different input voltage applied and gives digital output and it indicates the larger input applied at the input terminal.

You should also read about other ICs of the same family(LM3xx) like:

LM35, LM311, LM335, LM337, LM338, LM339, LM348, LM358,  LM386, LM393, etc.

LM339 pin configuration:

  • Pin 1(OUT): It is an output pin of the first comparator.
  • Pin 2(OUT): It is an output pin of the second comparator.
  • Pin 3(VCC): It is a power supply comparator.
  • Pin 4(IN-): It is a negative input pin of the second comparator.
  • Pin 5(IN+):  It is a positive input pin of the second comparator.
  • Pin 6(IN-):  It is a negative input pin of the first comparator.
  • Pin 7(IN+): It is a positive input pin of the first comparator.
  • Pin 8(IN-):  It is a negative input pin of the third comparator.
  • Pin 9(IN+): It is a positive input pin of the third comparator.
  • Pin 10(IN-): It is a negative input pin of the fourth comparator.
  • Pin 11(IN+): It is a +ve input pin of the fourth comparator.
  • Pin 12(GND): It is a ground pin.
  • Pin 13(OUT): It is an output pin of the fourth comparator.
  • Pin 14(OUT): It is an output pin of the third comparator.
LM339 pin configuration


Features of  LM339 IC:

  • Four individually operated voltage comparators.
  • Single supply operation: +3V to +36V.
  • Dual supply operation: +18V to -18V.
  • Single supply operation: +3V to +36V.
  • Low input bias current: 25 nA.
  • Low input offset voltage.
  • Low input offset current: + or - 5.0 nA.
  • Input Common-Mode voltage range to GND.
  • TTL and CMOS are compatible.
  • Low output saturation voltage: 130mV 
  • ESD clamps on the input increase reliability without affecting device operation.
  • Pb-free, halogen-free/BER free and RoHS compliant.

LM339 rating:

  • The (Vcc) supply voltage is 36V.
  • The rating of  (VIDR) input voltage differential range is 30 volts.
  • The rating of (ISC) output short circuit to GND is continuous.
  • The rating of (VICMR) input common-mode voltage will range fro, -0.3 volts to Vcc.
  • The rating of  (TA) operating temperature is -25 °c to 85 °c.
  • The rating of  (PD) power dissipation is 1.
  • The rating of (TJ) junction temperature is 150 °c.

LM339 package:

  • For LM339DG, this package will be SOIC-14 (lead (Pb)  are free)
  • For LM339DR2G, this package will be SOIC-14 (lead (Pb) are free)
  • For LM339DTBR2G, this package will be TSSOP-14 (lead (Pb) are free)
  • For LM339NG, this package will be PDIP-14 (lead (Pb) free)

Advantages of the LM339 IC:

  • High precision comparator.
  • It reduced VOS drift over temperature.
  • Eliminates the need for dual supplies.
  • Allow sensing near GND. 
  • Compatible with all forms of logic.
  • Power drain suitable for battery operation.

LM339 Application:


LM339 has a wide range of real-life applications, we have to represent the major application of LM339 are listed below:
  • Oscillator
  • Voltage comparators
  • Peak detectors
  • Industrial
  • Automotive
  • Measuring instruments
  • Power supervision
  • Logic voltage translation
  • Measuring instruments
  • Translation
  • Driving CMOS
  • Low-frequency Op-amp
  • Transducer Amplifier
  • Zero crossing detector
  • Limit compactor
  • Crystal controlled oscillator
  • Negative reference comparator
  • Driving TTL

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