L293D Dual H-Bridge Motor Driver IC DIP-16

L293D Dual H-Bridge Motor Driver IC DIP-16 is a highly integrated, quadruple high-current half-H driver designed to provide bidirectional drive currents for up to two DC motors simultaneously. The L293D specifically allows microcontrollers to easily control higher voltage and current inductive loads without risk of damage to sensitive logic circuitry. Furthermore, this versatile IC incorporates built-in internal clamp diodes, eliminating the need for external flyback diodes when switching inductive loads. You can consequently integrate this driver into robotics, automated systems, and mechatronic projects to achieve precise direction and speed control of bidirectional motors while saving valuable PCB real estate.

Key Features:

• Dual H-Bridge Configuration: The internal circuitry provides independent bidirectional control for two separate DC motors or a single bi-polar stepper motor.
• Integrated Clamp Diodes: Built-in transient suppression diodes effectively protect the driver stage and connected logic from inductive voltage spikes.
• Thermal Shutdown Protection: The chip automatically enters a safe state if it overheats, therefore preventing catastrophic failure during heavy load conditions.
• Wide Supply Range: Supporting motor voltages from 4.5V up to 36V, the IC offers additionally vast compatibility with various motor types.
• High-Noise-Immunity Inputs: The control inputs interface seamlessly with both standard TTL and CMOS logic families.

Technical Specifications:

• Motor Supply Voltage (V_CC2): 4.5 V to 36 V
• Logic Supply Voltage (V_CC1): 4.5 V to 7 V (Typically 5 V)
• Continuous Output Current: 600 mA (Per Channel)
• Peak Output Current: 1.2 A (Per Channel, non-repetitive)
• Maximum Switching Frequency: 5 kHz
• Operating Temperature Range: 0°C to 70°C

Mechanical Specifications:

• Component Material: Standard Epoxy Resin Plastic
• Package Style: Plastic Dual In-Line Package (PDIP), 16-Pin
• Pin Pitch: ≈ 2.54 mm (0.1 inch standard)
• Heat Sinking: Integrated thermal mass utilizes center pins (4, 5, 12, 13) to dissipate heat consequently through the PCB ground plane.

Dimensions:

• Body Length: ≈ 19.80 mm
• Body Width: ≈ 6.35 mm
• Body Height: ≈ 4.57 mm (Above board)
• Lead Material: Tinned Copper Base
• Weight: ≈ 1.0 g

Pinout and Wiring:

• Pin 1 (1,2EN): Control the enable state of the left H-Bridge side using a logic HIGH or PWM signal.
• Pins 2, 7 (1A, 2A): Connect these inputs to your microcontroller to dictate the rotation direction of Motor 1.
• Pins 3, 6 (1Y, 2Y): Route these output pins directly to the terminals of Motor 1.
• Pins 4, 5, 12, 13 (GND): Connect all four center pins to the common system ground to additionally maximize thermal dissipation.
• Pin 8 (V_CC2): Provide the main power source for the motors (up to 36V) to this pin.
• Pin 16 (V_CC1): Supply 5V logic power to this pin to operate the internal switching circuitry.

Datasheet Reference:

• Download L293D Motor Driver IC Datasheet

Commonly Used in:

• Mobile Robotics: Driving the main propulsion wheels or tracks on small-to-medium autonomous vehicles.
• Arduino Ecosystem Demos: Functioning as the core driver for beginner motor shields and breadboard circuits.
• Automation Components: Actuating linear linear actuators, small conveyors, and motorized locking mechanisms.

Applications:

• Stepper Motor Control: Managing the complex coil switching patterns required to drive NEMA 14 or NEMA 17 bi-polar stepper motors specifically.
• Relay Replacements: Switching large arrays of relays or high-current solenoids where mechanical switching proves inadequate.
• Speed Regulation: Interpreting PWM signals to smoothly scale the speed of rotary DC motors.

Equivalent Models:

• SN754410: A highly similar, pin-compatible driver that however offers a slightly higher continuous output current of 1.0A without built-in internal flyback diodes.
• L293E: The external-diode version of this chip, offering sensing pins but requiring external protection diodes.
• L298N: A larger, multiwatt packaged alternative therefore chosen for higher power (up to 2A) motor drive applications.

Package Includes:

• 1 x L293D Dual H-Bridge Motor Driver IC DIP-16