LM139-N, LM239-N, LM2901-N, LM3302-N, LM339-N

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SNOSBJ3E – NOVEMBER 1999 – REVISED DECEMBER 2014

Feature Description (continued)

The amount of current which the output device can sink is limited by the drive available (which is independent of

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-

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

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Product Folder Links: LM139-N LM239-N LM2901-N LM3302-N LM339-N