A3964SLBTR

Overview

The A3964SLBTR is a fully integrated bipolar stepper motor driver manufactured by Allegro MicroSystems. It combines control logic, an oscillator, a current regulator, and power output stages in a single package. The device supports four half-bridge outputs with parallel interface control. It operates on a supply voltage of 4.75V to 5.25V and drives loads between 5V and 30V. The output current capability is 800mA. It functions within a junction temperature range of -20°C to 150°C. The component is housed in a 20-SOIC surface-mount package.

Feature Summary

• Integrates full control logic, oscillator, and power stage for simplified design
• Supports bipolar stepper motors with parallel interface control
• Includes built-in current regulation for consistent torque performance

Applications

• General purpose bipolar stepper motor control
• Industrial automation systems
• Office equipment drive mechanisms

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status as records indicate variations between non-compliant and ROHS3 compliant versions for similar part numbers. Ensure the source document explicitly lists the A3964SLBTR variant rather than generic family data before finalizing procurement decisions.

Selection Notes

Select this component when a fully integrated solution for bipolar stepper motors is required without external logic components. The 800mA output rating suits moderate load applications. Verify that the 20-SOIC footprint matches the PCB layout constraints. Ensure the operating voltage range aligns with the system's 5V logic and power supply architecture.

Part Context

This part belongs to the A3964 series of stepper motor drivers from Allegro MicroSystems. It is designed as a complete motion control solution. The series typically features robust protection mechanisms and high noise immunity. It serves as a dedicated driver for applications requiring precise step control with minimal external circuitry complexity.

Replacement Considerations

Publicly confirmed substitute part number: A3966SLBTR-T.