IC L293D Pinout Diagram and Terminal Identification


IC L293D is a motor driver IC that works in the principle of the H-Bridge Principle. Generally, this IC is used by interfacing with the microcontroller ICs. We know that heavy load motors are required more electrical current to operate but the microcontroller ICs give output up to a few milliamperes. So, if we connect the heavy motors directly to the microcontroller IC, it will damage. That is why, the motor controller ICs such as L293D are used to operate the motor. These ICs takes low signals from the microcontroller ICs and operated heavy motor by the helping of auxiliary power supply.


IC L293D Pinout Diagram

Here, you can see the pin diagram of IC L293D

IC L293D Pinout Diagram, pin diagram of IC L293D


Here, the pin description of L293D. Remember that this IC has two parts right side part and the left side part and they work separately. So two motors can be connected, one on the right side while another on the left side.

Pin No. 1 - Enable 1 or Enable 1-2. It is also known as the master control pin. When the voltage of this pin is high, the left part of the IC will work, another part will not work.

Pin No. 2 - Input 1. When the voltage at this pin is high, output 1 will conduct the current.

Pin No. 3 - Output 1. It is to be connected to anyone terminal of the motor.

Pin No. 4 - Ground Pin

Pin No. 5 - Ground Pin

Pin No. 6 - Output 2. It is to be connected to another terminal of the motor with respect to output 1.

Pin No. 7 - Input 2. When the voltage to this pin is high. The output 2 will conduct current.

Pin No. 8 - Vs. This pin is to be connected to the high voltage power supply at which the motor will work such as 12V DC.

Pin No. 9 - ENABLE 2 or Enable 3-4. When the voltage at this pin is high, the right part of the IC will work and another part of the IC will not work. It is also called the master control pin for the right part of the IC.

Pin No. 10 - Input 3. When the voltage to this pin is high the output 3 will conduct current.

Pin No. 11 - Output 3. It is to be connected to anyone terminal of the motor.

Pin No. 12 - Ground Pin

Pin No. 13 - Ground Pin

Pin No. 14- Output 4. It is to be connected to another terminal of the motor with respect to output3.

Pin No. 15 - Input 4. When the voltage to this pin is high, output 4 will conduct current.

Pin No. 16 - Vcc. This pin is to be connected to the low voltage power supply at which the internal integrated circuit of the IC will operate. Generally, it is to be connected to the 5V DC power supply.


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IC L293D Pinout Diagram and Terminal Identification IC L293D Pinout Diagram and Terminal Identification Reviewed by Author on 12/19/2021 Rating: 5

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