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LM339 Quad Differential Comparator PDIP-14

Compact, low-power LM339 quad voltage comparator with open-collector outputs, wide supply range (2–30V), low input bias and TTL/CMOS-compatible outputs in PDIP-14 package.

10.00 EGP

In stockSKU 4853462715830
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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 Ground
13 4OUT Output pin of the comparator 4
14 3OUT Output pin of the comparator 3
User Guide

First let us consider the internal connection of four comparators in the device as shown below.

LM339 Internal Connections

Now let us take a single comparator from the four and construct a simple application circuit as show below.

LM339 Voltage Comparator Circuit

Here the comparison between voltages V1 and V2 is done by the device and an output is provided as Vo. Also the device is powered from single voltage source of VCC as shown above.

In the circuit the comparison output goes as:

  • If V1>V2 then Vo = VCC
  • If V2>V1 the Vo = 0V or GND

Based on the state of the output we can determine whether V1 is higher or V2 is higher at the input.

Applications
  • Window comparators, zero-cross detectors, and threshold detection circuits.
  • Level translation and logic interfacing using open-collector outputs.
  • Power supervision, battery monitoring, and undervoltage/overvoltage detection.
  • Oscillators, peak detectors, and pulse-shaping circuits.
  • Educational electronics, prototyping, and legacy PDIP-based designs.
Documents
Weight 2 g
Dimensions 20 × 9 × 7 mm
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