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LM339N Datasheet(PDF) 11 Page - Texas Instruments

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Part No. LM339N
Description  Low-Power Low-Offset Voltage Quad Comparators
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com

LM339N Datasheet(HTML) 11 Page - Texas Instruments

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LM139-N, LM239-N, LM2901-N, LM3302-N, LM339-N
Feature Description (continued)
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 (4
mV) allows the output to clamp essentially to ground level for small load currents.
7.4 Device Functional Modes
A basic comparator circuit is used for converting analog signals to a digital output. The output is HIGH when the
voltage on the non-inverting (+IN) input is greater than the inverting (-IN) input. The output is LOW when the
voltage on the noninverting (+IN) input is less than the inverting (-IN) input. The inverting input (-IN) is also
commonly referred to as the "reference" or "VREF" input.
All pins of any unused comparators should be tied to the negative supply.
The bias network of the LMx39-N series establishes a drain current which is independent of the magnitude of the
power supply voltage over the range of from 2 VDC to 30 VDC.
Copyright © 1999–2014, Texas Instruments Incorporated
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Product Folder Links: LM139-N LM239-N LM2901-N LM3302-N LM339-N

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