Explore L293D pins, signal names, electrical functions and connection guidance for each package.
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Enables outputs 1Y and 2Y together. LOW makes both high impedance.
Connect to a defined logic control or PWM signal.
Add a pull-down so the motor stays disabled during controller reset.
Controls the first half-bridge when enabled.
First direction-control signal.
First motor terminal for bridge A.
Connect to one motor lead; the other goes to 2Y.
Output has a voltage drop under load.
Supply return and package thermal connection.
Connect with pins 5, 12 and 13 to a ground plane.
Supply return and package thermal connection.
Connect all four ground pins.
Second motor terminal for bridge A.
Connect to the other motor lead.
Controls the second half-bridge when enabled.
Second direction-control signal.
Supplies the four power output stages.
Use +12 V in this example; decouple locally and add bulk capacitance.
The reviewed TI operating table requires VCC2 ≥ VCC1 and ≤36 V.
Enables outputs 3Y and 4Y together.
Tie LOW when the second bridge is unused.
Controls the third half-bridge.
Tie LOW if unused.
First output of bridge B.
Leave open if bridge B is unused.
Supply return and thermal connection.
Connect to the same ground plane as pins 4, 5 and 13.
Supply return and thermal connection.
Connect all four ground pins.
Second output of bridge B.
Leave open if bridge B is unused.
Controls the fourth half-bridge.
Tie LOW if unused.
Supplies internal logic translation.
Use +5 V and a 100 nF bypass to GND.
Keep the logic and motor supply returns connected.
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