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Aug 17 2020

LM339 Comparator: Pinout, Circuit, Parameter

Description

LM339 (Quad differential comparator) consist of four independent voltage comparators. It is a common integrated circuit and is mainly used in high-voltage digital logic gate circuits. Using LM339 can easily form various voltage comparator circuits and oscillator circuits.

lm339


Catalog

Description

Component Datasheet

LM339 Pinout

Basic Parameters

Features

Application

Pin Function List

Circuit Diagram

Package

Electrical Characteristics

Instructions

Product Manufacturer


Component Datasheet

Comparator Datasheet  

LM339 Datasheet


 

LM339 Pinout

lm339 pinoutLM339 Pinout


Basic Parameters

Parameter name

Symbol

Numerical value

unit

supply voltage

VCC

±18 or 36

V

Differential mode input voltage

VID

±36

V

Common mode input voltage

VI

-0.3~VCC

V

Power dissipation

Pd

570

mW

Working environment temperature

Topr

0 to +70

Storage temperature

Tstg

-65 to 150


Features

  •  Low voltage offset, generally 2mV
  •  The common-mode voltage range is very large, from 0v to the power supply voltage minus 1.5v
  •  The internal resistance limit to the signal source is very wide
  •  Single Supply Operation: 2-36V
  •  Dual  Supply Operation: ±1V-±18V
  •  The potential of output can be selected flexibly and conveniently

LM339 is similar to operational amplifier with non-adjustable gain. Each comparator has two inputs and one output. One of the two input terminals is called the non-inverting input terminal, which is represented by "+", and the other is called the inverting input terminal, which is represented by "-". When comparing two voltages, add a fixed voltage as a reference voltage at any input terminal, and add a signal voltage to be compared at the other terminal. When the voltage at the "+" terminal is higher than the "-" terminal, the output tube will cut off. When the voltage of the "-" terminal is higher than the "+" terminal, the output tube is saturated. The voltage difference between the two input terminals is greater than 10mV, which can ensure that the output can be reliably switched from one state to another state. Therefore, it is ideal to use the LM339 in weak signal occasions.

The output terminal of LM339 is equivalent to a crystal transistor that is not connected to the collector resistor. When using, the output terminal to the positive power supply generally needs to be connected to a resistor (called pull-up resistor). Choosing pull-up resistors with different resistance values will affect the value of the high potential at the output. Because when the output transistor is off, its collector voltage basically depends on the value of the pull-up resistor and the load. In addition, the output of each comparator is allowed to be connected together.


Application

  • Industrial
  • Automotive
    •  Infotainment and Clusters
    • Body Control Module
  •  Power Supervision
  • Oscillators
  • Peak Detectors
  • Logic Voltage Translation

Pin Function List

Pin Number

Pin function

Symbol

Pin Number

Pin function

Symbol

1

Output 2

OUT2

8

Inverting input 3

1N-(3)

2

Output 1

OUT1

9

Forward input 3

1N+(3)

3

Power Supply

VCC +

10

Inverting input 4

1N-(4)

4

Inverting input 1

1N-(1)

11

Forward input 4

1N+(4)

5

Positive input 1

1N+(1)

12

Power Supply

Vcc

6

Inverting input 2

1N-(2)

13

Output 4

OUT4

7

Forward input 2

OUT2(2)

14

Output 3

OUT3


Circuit Diagram

LM339 circuit diagramLM339 Circuit Diagram


Package lm339 package

LM339 Package


Electrical Characteristics

VCC=5.0V, Tamb=25℃, unless otherwise stated

Parameter name

Symbol

Test conditions

Minimum

Typical

Maximum

unit

Input offset voltage

VIO

VCM=0 to VCC-1.5 VO(P)=1.4 V, Rs=0

-

±1.0

±5.0

mV

Input offset current

IIO

-

-

±5

±50

nA

Input bias current

Ib

-

-

65

250

nA

Common mode input voltage

VIC

-

0

-

VCC-1.5

V

Quiescent Current

ICC

VCC= +5V, no load

-

1.1

2.0

mA

VCC= +30 V, no load

-

1.3

2.5

mA

Voltage gain

AV

VCC=15V, RL>15kΩ

-

200

-

V/mV

Sink current

Isink

Vi(-)>1V, Vi(+)=0V, Vo(p)<1.5V

6

16

-

mA

Output leakage current

IOLE

Vi(-)=0V, Vi(+)=1V, VO=5V

-

0.1

-

nA


Instructions

The LM339 series are high gain, wide bandwidth devices which, like most comparators, can easily oscillate if the output lead is inadvertently allowed to capacitively couple to the inputs via stray capacitance. This shows up only during the output voltage transition intervals as the comparator changes states. Power supply bypassing is not required to solve this problem. Standard PC board layout is helpful as it reduces stray input-output coupling. Reducing this input resistors to <10 k reduces the feedback signal levels and finally, adding even a small amount (1 to 10 mv) of positive feedback (hysteresis) causes such a rapid transition that oscillations due to stray feedback are not possible. Simply socketing the IC and attaching resistors to the pins will cause input-output oscillations during the small transition intervals unless hysteresis is used. If the input signal is a pulse waveform, with relatively fast rise and fall times, hysteresis is not required.

All pins of any unused comparators should be tied to the negative supply.

The bias network of LM339 establishes a drain current which is independent of the magnitude of the power supply voltage over the range of from 2 V to 30 V.

It is usually unnecessary to use a bypass capacitor across the power supply line.

The differential input voltage may be larger than V+ without damaging the device. Protection should be provided to prevent the input voltages from going negative more than -0.3 VDC (at 25 ℃). An input clamp diode can be used as shown in the applications section.

The output of the LM339 is the uncommitted collector of a grounded-emitter NPN output transistor. Many collectors can be tied together to provide an output OR ing function. An output pull-up resistor can be connected to any available power supply voltage  within the permitted supply voltage range and there is no restriction on this voltage due to the magnitude of the voltage which is applied to the V terminal of the LM1339 package. The output can also be used as a simple SPST switch to ground (when a pull-up resistor is not used). The amount of current which the output device can sink is limited by the drive available (which is independent of V) and the β of this device. When the maximum current limit is reached (approximately 16 mA), the output transistor will come out of saturation and the output voltage will rise very rapidly. The output saturation voltage is limited by the approximately 60 Ω RSAT of the output transistor. The low offset voltage of the output transistor (1 mV) allows the output to clamp essentially to ground level for small load currents.  


Product Manufacturer

Texas Instruments Inc. (TI)  is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. Its headquarters are in Dallas, Texas, United States. TI is one of the top ten semiconductor companies worldwide, based on sales volume. Texas Instruments's focus is on developing analog chips and embedded processors, which accounts for more than 80% of their revenue. TI also produces TI digital light processing (DLP) technology and education technology products including calculators, microcontrollers and multi-core processors. To date, TI has more than 43,000 patents worldwide.

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