The L293 is a quadruple high-current half-H driver. It includes four independent output channels. Each channel can control inductive loads such as relays, solenoids, and DC motors. Dual H-bridge configuration is supported for bidirectional motor driving.
The IC operates from a wide supply range. Logic supply ranges from 4.5 V to 7 V. Motor supply can reach up to 36 V. Each channel can source or sink up to 600 mA. Outputs are clamped with diodes to protect against back-EMF.
The device provides independent enable inputs for driver control. Thermal shutdown protection is integrated. The chip suits robotics, automation, and control systems. Direction and speed control are easily implemented using logic inputs.
Applications
Bidirectional DC motor control
Stepper motor driving
Relay or solenoid actuation
Robotics and automation platforms
Motorized toys and hobby projects
CNC machines and positioning systems
Fan and pump control circuits
Automotive electronics for motor switching
Embedded systems requiring high-current switching
Educational motor driver kits
Key Features
Four high-current half-H drivers
Bidirectional DC motor driving capability
600 mA output current per channel (1.2 A peak)
Motor supply voltage up to 36 V
Separate logic and motor supply pins
Thermal shutdown protection
Clamp diodes for inductive load protection
TTL/CMOS-compatible inputs
Enable inputs for individual driver control
Available in 16-pin DIP and SOIC packages
Pin Configuration (16-Pin DIP/SOIC)
| Pin | Name | Description |
|---|---|---|
| 1 | Enable 1 | Enables Drivers 1 and 2 |
| 2 | Input 1 | Input for Driver 1 |
| 3 | Output 1 | Output of Driver 1 |
| 4 | GND | Ground |
| 5 | GND | Ground |
| 6 | Output 2 | Output of Driver 2 |
| 7 | Input 2 | Input for Driver 2 |
| 8 | V<sub>CC2</sub> (Motor Supply) | Supply for Motor Voltage |
| 9 | Input 3 | Input for Driver 3 |
| 10 | Output 3 | Output of Driver 3 |
| 11 | GND | Ground |
| 12 | GND | Ground |
| 13 | Output 4 | Output of Driver 4 |
| 14 | Input 4 | Input for Driver 4 |
| 15 | Enable 2 | Enables Drivers 3 and 4 |
| 16 | V<sub>CC1</sub> (Logic Supply) | Supply for Logic Inputs |
Specifications Table
| Parameter | Value |
|---|---|
| Logic Supply Voltage (V<sub>CC1</sub>) | 4.5 V to 7 V |
| Motor Supply Voltage (V<sub>CC2</sub>) | Up to 36 V |
| Output Current (per channel) | 600 mA continuous, 1.2 A peak |
| Input Logic Compatibility | TTL/CMOS |
| Thermal Shutdown | Yes |
| Clamp Diodes | Internal |
| Enable Control | Yes (independent per driver pair) |
| Operating Temp Range | 0 °C to +70 °C ‘ |
| Package Options | DIP-16, SOIC-16 |
