L297 Stepper Motor Driver Controller: Datasheet, L297 and L298

Sophie

Published: 23 November 2021 | Last Updated: 23 November 2021

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L297D

L297D

STMicroelectronics

2.35mm mm 7.6mm mm Motor Drivers 20 5V V 3.9V V 13mm mm

Purchase Guide

2.35mm mm 7.6mm mm Motor Drivers 20 5V V 3.9V V 13mm mm

The L297 is a stepper motor controller IC. This post will unlock more details about L297. There is a huge range of Semiconductors, Capacitors, Resistors and ICs in stock. Welcome RFQ.

An arduiny.com video to explain how does l297 controls stepper motors for beginners. This is the first lesson for this tutorial.

L297 stepper controller for beginners

L297 Pinout

L297 Pinout.jpg

L297 Pinout

L297 CAD Model

Symbol

L297 Symbol.jpg

L297 Symbol

Footprint

L297 Footprint.jpg

L297 Footprint

3D Model

L297 3D Model.jpg

L297 3D Model

L297 Description

The L297 Stepper Motor Controller IC generates four phase drive signals for two-phase bipolar and four-phase unipolar step motors in microcomputer-controlled applications. The motor can be driven in half step, normal and wave drive modes and on-chip PWM chopper circuits permit switch-mode control of the current in the windings. A feature of this device is that it requires only clock, direction and mode input signals. Since the phase is generated internally the burden on the microprocessor, and the programmer is greatly reduced. Mounted in DIP20 and SO20 packages, the L297 can be used with monolithic bridge drives such as the L298N or L293E, or with discrete transistors and Darlington.

L297 Feature

  • Normal/ wave drive

  • Half/ full step modes

  • Clockwise/ anticlockwise direction

  • Switchmode load current regulation

  • Programmable load current

  • Few external components

  • Reset input&home output

  • Enable input


L297 Schematic

L297 Schematic.jpg

L297 Schematic

L297 and L298 Circuit

A two-phase bipolar stepper motor drive circuit can be built using L297 and L298. It's powered by a constant current mode, and each phase's peak current can reach 2A. The L297 is a stepper motor controller that produces two-phase bipolar voltage. Set the drive signal (A, B, C, D) and the motor current. The stepper motor's power output is driven by the L298. A double full bridge mode is used to power it. The motor coil is fully utilized due to the bipolar drive, allowing the motor to attain the best drive.

A stepping motor subdivision driving circuit is constructed when two pieces of L297 are used to drive the two windings of a stepping motor through L298, and the Vref corresponding to each winding is adjusted through two D/A converters.

The schematic below depicts the L297+L298 drive wiring theory. The appropriate control terminals of L297 are linked to ports P0 and P4. The goal of commanding the motor to rotate in the predicted direction is therefore accomplished thanks to the software's rational organization.

L297 and L298 Schematic Diagram.jpg

L297 and L298 Schematic Diagram

In addition, terminal 1 of L297 is the synchronous terminal, which can be connected to terminal 1 of another group of L297 and L298 drive circuits. In this way, the two sets of drivers can be synchronized to achieve the effect of driving multiple motors at the same time.

Synchronising L297s.jpg

Synchronising L297s


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Specifications

STMicroelectronics L297D technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics L297D.
  • Type
    Parameter
  • Lifecycle Status

    Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.

    ACTIVE (Last Updated: 7 months ago)
  • Factory Lead Time
    10 Weeks
  • Mount

    In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.

    Surface Mount
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Surface Mount
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    20-SOIC (0.295, 7.50mm Width)
  • Number of Pins
    20
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    -40°C~150°C TJ
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Tube
  • JESD-609 Code

    The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.

    e4
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Active
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    3 (168 Hours)
  • Number of Terminations
    20
  • ECCN Code

    An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.

    EAR99
  • Terminal Finish

    Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.

    Nickel/Palladium/Gold (Ni/Pd/Au)
  • Applications

    The parameter "Applications" in electronic components refers to the specific uses or functions for which a component is designed. It encompasses various fields such as consumer electronics, industrial automation, telecommunications, automotive, and medical devices. Understanding the applications helps in selecting the right components for a particular design based on performance, reliability, and compatibility requirements. This parameter also guides manufacturers in targeting their products to relevant markets and customer needs.

    General Purpose
  • Voltage - Supply

    Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.

    4.75V~7V
  • Terminal Position

    In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.

    DUAL
  • Terminal Form

    Occurring at or forming the end of a series, succession, or the like; closing; concluding.

    GULL WING
  • Peak Reflow Temperature (Cel)

    Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.

    260
  • Supply Voltage

    Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.

    5V
  • Terminal Pitch

    The center distance from one pole to the next.

    1.27mm
  • Time@Peak Reflow Temperature-Max (s)

    Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.

    30
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    L297
  • Function

    The parameter "Function" in electronic components refers to the specific role or purpose that the component serves within an electronic circuit. It defines how the component interacts with other elements, influences the flow of electrical signals, and contributes to the overall behavior of the system. Functions can include amplification, signal processing, switching, filtering, and energy storage, among others. Understanding the function of each component is essential for designing effective and efficient electronic systems.

    Controller - Commutation, Direction Management
  • Number of Outputs
    4
  • Output Voltage

    Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.

    3.9V
  • Operating Supply Voltage

    The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.

    5V
  • Supply Voltage-Max (Vsup)

    The parameter "Supply Voltage-Max (Vsup)" in electronic components refers to the maximum voltage that can be safely applied to the component without causing damage. It is an important specification to consider when designing or using electronic circuits to ensure the component operates within its safe operating limits. Exceeding the maximum supply voltage can lead to overheating, component failure, or even permanent damage. It is crucial to adhere to the specified maximum supply voltage to ensure the reliable and safe operation of the electronic component.

    7V
  • Power Supplies

    an electronic circuit that converts the voltage of an alternating current (AC) into a direct current (DC) voltage.?

    5V
  • Interface

    In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.

    Parallel
  • Nominal Supply Current

    Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.

    80mA
  • Output Configuration

    Output Configuration in electronic components refers to the arrangement or setup of the output pins or terminals of a device. It defines how the output signals are structured and how they interact with external circuits or devices. The output configuration can determine the functionality and compatibility of the component in a circuit design. Common types of output configurations include single-ended, differential, open-drain, and push-pull configurations, each serving different purposes and applications in electronic systems. Understanding the output configuration of a component is crucial for proper integration and operation within a circuit.

    Pre-Driver - Half Bridge (4)
  • Output Current

    The rated output current is the maximum load current that a power supply can provide at a specified ambient temperature. A power supply can never provide more current that it's rated output current unless there is a fault, such as short circuit at the load.

    10mA
  • Collector Emitter Voltage (VCEO)

    Collector-Emitter Voltage (VCEO) is a key parameter in electronic components, particularly in transistors. It refers to the maximum voltage that can be applied between the collector and emitter terminals of a transistor while the base terminal is open or not conducting. Exceeding this voltage limit can lead to breakdown and potential damage to the transistor. VCEO is crucial for ensuring the safe and reliable operation of the transistor within its specified limits. Designers must carefully consider VCEO when selecting transistors for a circuit to prevent overvoltage conditions that could compromise the performance and longevity of the component.

    7V
  • Motor Type

    Motor Type in electronic components refers to the classification or categorization of motors based on their design, construction, and operating characteristics. This parameter helps in identifying the specific type of motor being used in a particular electronic device or system. Common motor types include DC motors, AC motors, stepper motors, servo motors, and brushless motors, each with its own unique features and applications. Understanding the motor type is crucial for selecting the right motor for a given application, as different types of motors have different performance characteristics, efficiency levels, and control requirements. It is important to consider the motor type when designing or troubleshooting electronic systems to ensure optimal performance and reliability.

    Stepper
  • Motor Type - Stepper

    Motor Type - Stepper refers to a type of electromechanical device that converts electrical pulses into discrete mechanical movements. Stepper motors move in fixed angular increments or steps, allowing for precise control of position and speed. They are commonly used in applications requiring accurate positioning, such as 3D printers, CNC machines, and robotics. Stepper motors typically operate by energizing coils in a specific sequence, creating a magnetic field that moves the rotor in defined steps.

    Bipolar, Unipolar
  • Step Resolution

    Servo motor resolution is determined by feedback device of motor. I.e. 1000 PPR (pulses per revolution) quadrature encoder yields 1/4000 revolution resolution because 1000 PPR equals 4000 counts per revolution after standard 4X decoding.

    1, 1/2
  • Height
    2.35mm
  • Length
    13mm
  • Width
    7.6mm
  • REACH SVHC

    The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.

    No SVHC
  • Radiation Hardening

    Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.

    No
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    ROHS3 Compliant
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Lead Free
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L297 Package

L297 Package.jpg

L297 Package

L297 Manufacturer

STMicroelectronics is a globally recognized semiconductor company. They are dedicated to developing semiconductor solutions for various microelectronics applications. STMicroelectronics enjoys unrivalled silicon and system expertise, strong manufacturing strength, IP portfolio, and solid relationships with their strategic partners. Based on these advantages, STMicroelectronics has become a pioneer in System-on-Chip (SoC) technology and its products have a positive effect in realizing today's convergence trends.

Datasheet PDF

Download datasheets and manufacturer documentation for STMicroelectronics L297D.

Popularity by Region

Frequently Asked Questions

What is L297?

The L297 has all of the necessary control circuits for bipolar and unipolar stepper motor control. The L298N, when combined with a dual bridge driver, creates a comprehensive microprocessor-to-bipolar stepper motor interface.

How does l298n control DC motor speed?

1. If you send a HIGH signal to the enable 1 pin, motor A is ready to be controlled and at the maximum speed;

2. If you send a LOW signal to the enable 1 pin, motor A turns off;

3. If you send a PWM signal, you can control the speed of the motor. The motor speed is proportional to the duty cycle.

What is the motor driving phase sequences of L297?

The L297’s translator generates phase sequences
for a normal drive, wave drive and half step modes.
The state sequences and output waveforms for
these three modes are shown below. In all cases,
the translator advances on the low to high transition of CLOCK.
Clockwise rotation is indicated; for anticlockwise rotation, the sequences are simply reversed RESET
restores the translator to state 1, where ABCD = 0101.

What is the function of H bridge?

An H-bridge is an electronic circuit that switches the polarity of a voltage applied to a load. These circuits are often used in robotics and other applications to allow DC motors to run forwards or backwards.

What does the L297 Stepper Motor Controller IC generate for two-phase bipolar and four-phase unipolar step motors?

Four phase drive signals.

What type of drives can the L297 be used with?

Monolithic bridge drives.
L297D

STMicroelectronics

In Stock: 1000

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