The motors are rotated based on the inputs provided across the input pins as HIGH or LOW signals. The left side input pins regulate the rotation of the motor connected across the left end and the right-side input pins regulate the motor on the right-side. Pin 2,7 (1A and 2A) on the left side and pin 15,10 (3A and 4A) on the right of the IC. There are 4 input pins for direction control in L293d.

Automatic thermal shutdown is available Working of L293D Motor Driver IC.

Output Clamp Diodes for Inductive Transient Suppression.

Wide Supply-Voltage Range: 4.5 V to 36 V.

Specifications and information like Absolute maximum ratings, Block diagram, and suggested circuits can be found in the datasheet. You can find detailed information on L293D IC in the datasheet given above. L293D Motor Driver IC Datasheet:Ĭlick this link to view the entire DATASHEET When we solder these pins on PCB, we get a large metallic area between the grounds where the heat can be released. So, we need a heat sink to reduce the heating and protect the IC from damage. Note: There are total 4 ground pins in L293D IC because it has to deal with heavy currents. 9 Enable 3-4 When this pin is given HIGH or Logic 1, the right side of the IC works and when it is low, the right side doesn’t work. 10 INPUT 3 When this pin is given HIGH or logic 1, the output 3 becomes HIGH. 11 OUTPUT 3 This pin is connected to one of the terminals of the motor 2. 13,12 GND Should be connected to the circuit’s ground. 14 OUTPUT 4 This pin is connected to one of the terminals of the motor 2. 15 INPUT 4 When this pin is given HIGH or logic 1, the output 4 becomes HIGH.

So, this pin should be supplied with 5 V. 16 VCC1 It provides power to the l293D IC. IT can be greater than the IC voltage(VCC1). 8 VCC2 This is the voltage required to run the motor. 7 INPUT 2 When this pin is given HIGH or Logic 1, the output 2 becomes HIGH.

6 OUTPUT 2 This pin is connected to one of the terminals of the motor 1. 4,5 GND Should be connected to the circuit’s ground. 3 OUTPUT 1 This pin is connected to one of the terminals of the motor 1. 2 INPUT 1 When this pin is given HIGH or logic 1, the output 1 becomes HIGH. Name Function 1 Enable 1-2 When this pin is given HIGH or Logic 1, the left side of the IC works and when it is low, the left side doesn’t work.

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