Texas Instruments
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Quad half-H bridge with internal flyback diodes — drives two DC motors or one stepper at 600mA per channel. The D suffix is what gives it the diodes.
| Part number | L293D |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Integrated Circuits › Gate Drivers |
| Package | DIP-16 |
| Pins | 16 |
| Current | 600 mA |
L293D pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | EN1 | input | Enable channels 1 and 2 — PWM here for speed |
| 2 | IN1 | input | Input 1 |
| 3 | OUT1 | output | Output 1 |
| 4 | GND | ground | Ground and heatsink |
| 5 | GND | ground | Ground and heatsink |
| 6 | OUT2 | output | Output 2 |
| 7 | IN2 | input | Input 2 |
| 8 | VCC2 | power | Motor supply, up to 36V |
| 9 | EN2 | input | Enable channels 3 and 4 |
| 10 | IN3 | input | Input 3 |
| 11 | OUT3 | output | Output 3 |
| 12 | GND | ground | Ground and heatsink |
| 13 | GND | ground | Ground and heatsink |
| 14 | OUT4 | output | Output 4 |
| 15 | IN4 | input | Input 4 |
| 16 | VCC1 | power | Logic supply, 5V |
Schematic symbol and footprint
Schematic symbol
Footprint: DIP-16 — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.