LM393 Datasheet PDF – Dual Comparator – Motorola

What is comparator?

A comparator is an electronic circuit that compares two voltage inputs and outputs a digital signal indicating which input voltage is higher or lower. The output of a comparator is typically a logic signal, such as a high or low signal, that can be used to control other electronic devices, such as switches or LEDs.

Comparators have a wide range of applications in electronic circuits. For example, they can be used to compare a signal with a reference voltage and trigger an alarm or other action when the signal exceeds a certain threshold. They can also be used in voltage regulators to compare the output voltage with a reference voltage and adjust the output to maintain a stable voltage.

Part Number: LM393

Function: Low Offset Voltage Dual Comparator

Package: DIP, SOP 8 Pin Type

Manufacturer: Motorola ( Freescale )


LM393 datasheet



The LM393 series are dual independent precision voltage comparators capable of single or split supply operation. These devices are designed to permit a common mode range–to–ground level with single supply operation. Input offset voltage specifications as low as 2.0 mV make this device an excellent selection for many applications in consumer automotive, and industrial electronics.

LM393 is a low-power, dual voltage comparator IC (integrated circuit). It consists of two independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages. The LM393 is commonly used in applications where it is necessary to compare two voltages or signals and determine their relationship to each other.

The LM393 has a number of features that make it well-suited for a variety of applications. It has a low input bias current, a low input offset voltage, and a wide supply voltage range. It is also designed to operate over a wide temperature range and has a low quiescent current, making it ideal for battery-powered applications.


1. Wide Single–Supply Range : 2.0 Vdc to 36 Vdc

2. Split–Supply Range : ±1.0 Vdc to ±18 Vdc

3. Very Low Current Drain Independent of Supply Voltage : 0.4 mA

4. Low Input Bias Current : 25 nA

5. Low Input Offset Current : 5.0 nA

6. Low Input Offset Voltage : 2.0 mV (max) LM393A, 5.0 mV (max) LM293/393

7. Input Common Mode Range to Ground Level

8. Differential Input Voltage Range Equal to Power Supply Voltage

9. Output Voltage Compatible with DTL, ECL, TTL, MOS, and CMOS Logic Levels

10. ESD Clamps on the Inputs Increase the Ruggedness of the Device without Affecting Performance

1. Q/A.

What is the difference between LM393 and LM339?

1. Both ICs are voltage comparators, but the LM339 has four comparators while the LM393 has two. The LM339 also has a higher output current drive capability and a wider operating temperature range.

Other data sheets are available within the file: LM2903D, LM2903N, LM2903VD, LM2903VN, LM293D

LM393 Datasheet PDF Download

LM393 pdf

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