A3964SLB-T

Overview

The A3964SLB-T is a fully integrated bipolar stepper motor driver manufactured by Allegro MicroSystems. It combines control logic, current regulation, and power output stages in a single package. The device supports parallel interface operation and features an output current capability of 800mA per channel. It operates with a supply voltage range of 4.75V to 5.25V and handles load voltages from 5V to 30V. The component is housed in a 20-SOIC surface-mount package and functions within a junction temperature range of -20°C to 150°C.

Feature Summary

• Integrates full control logic and power output stages for simplified design
• Provides PWM-based current regulation for bipolar stepper motors
• Includes built-in protection mechanisms against overcurrent and thermal events

Applications

• Bipolar stepper motor control systems
• General purpose motion control applications
• Industrial automation equipment

Procurement Notes

Verify the specific suffix configuration when ordering, as packaging variations such as tape-and-reel or tube may exist. Confirm that the 20-SOIC footprint matches the target PCB layout. Check RoHS compliance status if environmental regulations apply to the end product. Ensure the supply voltage aligns with the specified 4.75V to 5.25V range for proper operation.

Selection Notes

Select this component for applications requiring a compact solution for driving bipolar stepper motors. The integrated nature reduces external component count compared to discrete driver solutions. Consider the 800mA output limit when sizing for motor torque requirements. The wide operating temperature range supports use in demanding industrial environments.

Part Context

This part belongs to the A3964 series of motor drivers from Allegro MicroSystems. It is designed specifically for low-voltage bipolar stepper motor applications. The series offers a complete solution by integrating necessary control functions and power switching elements into a single semiconductor device.

Replacement Considerations

The A3968SLB is a related part number within the same family, offering similar functionality but with different pin counts and current ratings.