on October 13th 267

L293DD Channel Driver: Complete Guide to Pinout, Features, and Datasheet

Managing inductive loads efficiently is a serious challenge in modern electronics, and the L293DD four-channel push-pull driver stands out as a versatile solution. With integrated diodes for flyback protection and the ability to drive relays, solenoids, and DC or stepping motors, it’s a favored choice for applications such as industrial automation and educational robotics. This article explores the L293DD’s pinout, key features, and performance characteristics, providing the basic details for leveraging its motor control and switching systems capabilities.

Catalog

Pinout of L293DD

L293DD Overview

The L293DD is a high-voltage, high-current four-channel driver designed to accommodate standard DTL or TTL logic levels. This versatile IC excels at driving inductive loads such as relays, solenoids, DC and stepping motors, and power transistors. It's mostly effective in switching applications with frequencies up to 5 kHz. The package is a 20-pin surface mount type, featuring 8 center pins dedicated to heatsinking for efficient thermal management.

The L293DD’s ability to interface with both DTL and TTL logic levels enhances its adaptability across a wide array of applications. In industrial automation, devices frequently transition between different types of loads; the L293DD manages these changes seamlessly thanks to its high-current handling capacity. Its robustness in dealing with inductive loads without performance deterioration opens up practical uses, such as motion control in manufacturing equipment.

Managing heat effectively is paramount in high-current driver applications. The 8 center pins for heatsinking in the 20-pin configuration epitomize the L293DD’s focus on maintaining stable operating temperatures. Effective heat dissipation reduces the risk of thermal shutdown and prolongs the device’s lifespan. Practical applications often benefit from integrating heat sinks or optimizing PCB design to enhance heat transfer, further improving operational reliability. With an operational range extending to 5 kHz, the L293DD is ideal for applications requiring swift switching. This frequency range is versatile, covering low-frequency motor control and higher-frequency switching in power transistors. Actual efficiency often involves precise tuning of driver controls to match specific load characteristics, resulting in optimized performance and reduced energy losses, thereby contributing to overall system efficiency.

L293DD CAD Representation

Symbol

Footprint

3D Model

Key Specifications

Type	Parameter
Lifecycle Status	ACTIVE (Last Updated: 6 months ago)
Factory Lead Time	10 Weeks
Mount	Surface Mount
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.295, 7.50mm Width)
Number of Pins	20
Voltage Rated	50V
Operating Temperature	-40°C ~ 150°C TJ
Packaging	Tube
Tolerance	1%
JESD-609 Code	e4
Part Status	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Number of Terminations	20
ECCN Code	EAR99
Resistance	15kOhm
Terminal Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
Applications	General Purpose
Power Rating	100mW
Voltage - Supply	4.5V ~ 36V
Terminal Position	DUAL
Terminal Form	GULLWING
Peak Reflow Temperature (°C)	250
Supply Voltage	5V
Terminal Pitch	1.27mm
Time @ Peak Reflow Temperature (Max)	30s
Base Part Number	L293
Function	Driver - Fully Integrated, Control & Power Stage
Case Code (Metric)	1608
Case Code (Imperial)	603
Max Output Current	1.2A
Operating Supply Voltage	24V
Number of Channels	4
Interface	Parallel
Nominal Supply Current	2mA
Output Configuration	Half Bridge (4)
Output Characteristics	3-STATE
Output Current per Channel	600mA
Collector-Emitter Voltage (VCEO)	36V
Max Collector Current	1.2A
Output Polarity	TRUE
Input Characteristics	STANDARD
Voltage - Load	4.5V ~ 36V
Output Peak Current Limit-Nom	1.2A
Supply Voltage1-Nom	24V
Built-in Protections	THERMAL
Motor Type	Brushed
Output Current Flow Direction	SOURCE SINK
Motor Type - AC, DC	Brushed DC
Motor Type - Stepper	Bipolar
Height	450μm
Length	1.6mm
Width	800μm
REACH SVHC	Unknown
Radiation Hardening	No
RoHS Status	ROHS3 Compliant
Lead-Free	Lead-Free

Core Features of L293DD

Output Current Handling

The L293DD is planned to deliver an output current of 600mA per channel, capable of reaching a peak current of up to 2A per channel in short, non-repetitive bursts. These characteristics make it suitable for driving medium-power devices, enhancing the system's robustness. Specialists find these attributes mainly valuable in applications requiring nuanced motor control, which in turn boost’s reliability.

Enable Facility

An enable facility allows for the selective activation of motor channels. This feature optimizes efficiency by tailoring energy flow to specific components. This output control mechanism is beneficial in designing circuits that require conditional actuation or staggered channel engagement, ensuring both precision and energy conservation.

Overtemperature Protection

Thermal management significantly influences the longevity and performance of electronic components. The L293DD’s overtemperature protection mechanism detects excess heat buildup and adjusts operations to prevent thermal damage. This safeguard makes the L293DD ideal for use in environments where temperature fluctuations are a common concern, thus providing a reliable solution to overheating risks.

High Noise Immunity Logical Input

Signal integrity can be compromised by environmental noise. The L293DD’s high noise immunity logical input guarantees accurate signal interpretation, minimizing errors. This feature assures consistent performance in electrically noisy surroundings, thereby enhancing overall system stability and reliability.

Internal Clamp Diodes

The internal clamp diodes of the L293DD protect transistors from voltage spikes, mainly those caused by inductive loads. This built-in protection is invaluable in scenarios involving components like motors or relays, as it mitigates potential voltage transients that could damage electronic circuits.

Circuit Diagram of L293DD

Applications of L293DD

Use in DC Motor Drivers

Frequently employed in DC motor driver circuits, the L293DD supports various robotics and automation projects. It offers bidirectional control, allowing for precise movement and speed regulation, used for tasks needing high accuracy. For instance, in automated guided vehicles (AGVs) and robotic arms used in manufacturing, precise control of motor operations is achieved through the L293DD, significantly enhancing efficiency and precision.

Role in Relay Drivers

The L293DD is also prominent in relay driver circuits. Relays require sufficient current to function, which the L293DD can effectively supply. Highly beneficial in industrial automation systems, the L293DD manages the switching of heavy loads, ensuring reliability and safety in environments such as controlling heavy machinery or regulating HVAC systems.

Application in Stepper Motor Drivers

Stepper motors operate correctly only with precise control of step sequences. The L293DD excels in this area and is widely used in stepper motor driver applications. Handling rigorous requirements of CNC machines and 3D printers ensures accurate and repeatable movements. In medical devices like automated syringe pumps and precise imaging equipment, the L293DD achieves the needed precision and reliability.

Use in Two-Phase Motor Driver Applications

The L293DD proves instrumental in two-phase motor driver applications. These motors, common in small household appliances and office equipment, benefit from the L293DD's efficient and controllable power supply. Ensuring smooth operation and prolonging device life, the L293DD plays a basic role in printers and scanners. The motor reliability directly improves your experience and equipment lifespan.

Dimensional Outline of L293DD

Manufacturer Information

STMicroelectronics, a pioneering semiconductor company, stands at the forefront of technological innovation. They possess extensive expertise in both silicon and system solutions, contributing significantly to modern technology trends. The innovative spirit and technical mastery of this company are evident in its diverse product range, such as the L293DD.

STMicroelectronics showcases leadership through its deep involvement in SoC technology. This technology integrates multiple functions onto a single chip, which enhances performance and reduces costs. The L293DD stands as a testament to their ability to produce compact and efficient electronics. Actual applications of SoC technology are prevalent in many consumer electronics, where seamless functionality and reduced power consumption draw your admiration and satisfaction.

Leveraging advanced fabrication techniques and deep design knowledge, STMicroelectronics addresses complex technological challenges. Their components drive the efficiency of modern electronic systems. These advancements have been validated through widespread industry adoption, demonstrating a blend of notional and actual mastery. Their expertise allows them to create solutions tailored to the specific demands of various high-tech applications, cementing their edge in the competitive semiconductor landscape.

Comparable Parts

Part Number	Manufacturer	Package / Case	Number of Pins	Interface	Supply Voltage	Supply Voltage1-Nom	RoHS Status	Part Status	Terminal Form
L293DD	STMicroelectronics	20-SOIC (0.295", 7.50mm Width)	20	Parallel	5 V	24 V	RoHS3 Compliant	Active	Gull Wing
SN751177NSR	Texas Instruments	16-SOIC (0.209", 5.30mm Width)	16	-	5 V	5 V	RoHS3 Compliant	Active	Gull Wing
TJA1048T,118	NXP USA Inc.	14-SOIC (0.154", 3.90mm Width)	-	-	5 V	-	RoHS3 Compliant	Active	Gull Wing
PCF8584T/2,518	NXP USA Inc.	14-SOIC (0.154", 3.90mm Width)	-	-	5 V	-	RoHS3 Compliant	Active	Gull Wing
TJA1043T,118	NXP USA Inc.	20-SOIC (0.295", 7.50mm Width)	-	Parallel	5 V	-	RoHS3 Compliant	Active	Gull Wing

Datasheet PDF

L293DD Datasheets:

L293D(D).pdf

SN751177NSR Datasheets:

SN751177-78.pdf

TJA1043T,118 Datasheets:

Cylindrical Battery Holders.pdf

Frequently Asked Questions [FAQ]

1. What is L293D?

The L293D is a motor driver IC with 16 pins. It facilitates the concurrent control of two DC motors, enabling independent governance over each motor's directional movement. This IC finds favor in embedded systems and robotics applications, appreciated for its versatility and efficient performance.

2. How does the L293D operate?

The L293D leverages its 16 pins to enable multi-directional control of DC motors, accommodating both small and large varieties. The architecture supports the precise manipulation of two motors independently. This capability translates to a broad range of applications in automated systems, ensuring precise motor control.

3. How to program L293D?

Mount the L293D on a breadboard. Supply 5V voltage to the Enable 1, Vss, and Vs pins. Connect digital output pins to input 1 and input 2. This setup permits the coordination of motor directions via software, typically through a microcontroller like an Arduino. The successful motor operation often hinges on meticulous pin configuration.

4. What is the purpose of the L293D motor driver?

The L293D IC manages two DC motors, providing bidirectional drive currents up to 600mA per channel, with operational voltages spanning from 4.5V to 36V. Robotics applications and automotive applications' role in enhancing control efficiency is frequently highlighted in manufacturing practice.

5. Which is better L293D vs L298N?

The L293D and L298N motor drivers have distinct characteristics. L298N is higher current handling up to 4A with adequate heatsinking and operating voltages up to 46V. L293D is driving currents up to 600mA and operates within a voltage range of up to 36V. In production practice, the choice often depends on the specific current and voltage requirements, balancing functionality, and power efficiency.