LM393 Dual Comparator

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LM393 IC consists of two independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages. The IC has a distinct advantage over conventional comparators in terms of operating efficiency. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC also offers a wide range of applications such as high operating speed, fan-in/fan-out capabilities, and low production cost, etc.

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Voltage Comparator

A voltage comparator is a simple electronic circuit that has the capability to compare two applied voltages. The comparator then switches the output to either high or low state depending upon which voltage is higher. Comparator circuits are widely used in applications, where physical measurements need to be compared, provided those physical variables can be translated into voltage signals. In a practical voltage comparator; the reference voltage is set using the voltage divider network comprising of R1 and R2.

Vref = (V+/ (R1 + R2)) x R2.

LM393 Pinout

LM393 Pin Configuration

Pin No	Pin Name	Description
1	OUTPUT A	Output of Comparator A
2	INV-INPUT A	Inverting Input Of Comparator A
3	NON-INV-INPUT A	Non Inverting Input Of Comparator A
4	GND	Ground Pin
5	NON-INV-INPUT B	Inverting Input Of Comparator B
6	INV-INPUT B	Non Inverting Input Of Comparator B
7	OUTPUT B	Output of Comparator B
8	V+	Positive Supply Voltage