L2971 STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
L2971 is a stepper motor controller IC from STMicroelectronics, operating from 4.75 V to 7 V in a 20-pin PDIP package, integrating full-bridge drive logic for two-phase bipolar or unipolar stepper motors in embedded motion systems.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- L2971 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of L2971?
- Dual full-bridge drive logic for two-phase bipolar stepper motor control
- Supply voltage range of 4.75 V to 7 V compatible with 5 V logic systems
- 20-pin PDIP package for straightforward through-hole prototyping and repair
- Integrated direction and step input interface reduces external component count
- Built-in thermal protection prevents IC damage under overload conditions
- Compatible with standard TTL/CMOS logic control signals for easy MCU interfacing
What is L2971 used for?
The L2971 is designed for driving two-phase stepper motors in printers, plotters, and document scanners where precise position control without encoder feedback is required. It is also used in small CNC machines and laboratory automation equipment operating from a regulated 5 V bus, taking step and direction commands directly from a microcontroller. Its through-hole 20-pin PDIP package makes it a practical choice for prototyping and retrofit applications in legacy industrial motion systems.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the L2971 datasheet?
L2971 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for L2971?
Compatible alternatives and drop-in replacements for L2971:
Frequently Asked Questions
What supply voltage does the L2971 stepper motor controller require, and is it compatible with 5 V systems?
The L2971 operates from a supply voltage of 4.75 V to 7 V, placing the standard 5 V regulated rail comfortably within its operating window and allowing direct connection to common 5 V microcontroller and logic boards without additional regulation.
Can the L2971 drive both bipolar and unipolar stepper motors, and how many phases does it support?
The L2971 integrates dual full-bridge drive circuitry that supports two-phase stepper motor configurations, making it compatible with both bipolar motors (driven phase by phase) and unipolar motors by selecting the appropriate winding connections across its 20 output pins.
How does the L2971 protect itself from thermal damage in continuous-duty motor applications?
The L2971 incorporates built-in thermal shutdown protection that automatically disables the output bridges when the junction temperature exceeds a safe threshold, preventing permanent damage during prolonged high-current stepper motor driving or insufficient heatsinking scenarios.
What pin count and package does the L2971 use, and how does that affect board layout?
The L2971 comes in a 20-pin PDIP package with 2.54 mm pitch through-hole leads, which simplifies hand-soldering and prototype board assembly but requires a footprint approximately 25 mm long, a factor to consider when space is constrained on production PCBs.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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