A3964SLB

Overview

The A3964SLBTR is a fully integrated bipolar stepper motor driver manufactured by Allegro MicroSystems. It operates with a supply voltage range of 4.75V to 5.25V and supports load voltages from 5V to 30V. The device delivers an output current of 800mA and features four half-bridge outputs. It utilizes a parallel interface and is housed in a 20-SOIC package. The component functions as a complete control and power stage solution, suitable for applications requiring a temperature range of -20°C to 150°C (TJ).

Feature Summary

• Fully integrated design combining control logic and power stages for bipolar stepper motors.
• Supports microstepping resolution via external clock input.
• Includes built-in protection mechanisms such as thermal shutdown and under-voltage lockout.

Applications

• Office automation equipment
• Industrial motion control systems
• Consumer electronics requiring precise motor positioning

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape/reel specifications. Confirm RoHS compliance status as indicated in manufacturer documentation. Ensure the source document explicitly lists the part number to avoid substitution errors. Check for any recent product change notices regarding packaging or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a fully integrated solution for bipolar stepper motors is required. It is appropriate for designs needing a single-chip controller and driver. Consider the 20-SOIC package constraints and the 800mA current capability. Verify that the operating voltage and temperature ranges align with the system requirements.

Part Context

The A3964 belongs to Allegro's family of highly integrated mixed-signal ICs designed for motor control. These components are engineered to reduce board space and simplify design by integrating both logic and power elements. The series targets applications demanding reliable performance in compact form factors.

Replacement Considerations

Consult official Allegro MicroSystems documentation for confirmed substitute part numbers. Do not assume cross-compatibility with other models without verifying pinouts and electrical parameters. Refer to manufacturer notices for end-of-life replacements.