A4989SLDTR-T

Overview

The A4989SLDTR-T is a dual full-bridge MOSFET gate driver with an integrated microstep translator, manufactured by Allegro MicroSystems. It operates on a supply voltage range of 3 V to 5.5 V and supports load voltages from 12 V to 50 V. The device features two drivers with a maximum output current of 200 mA per channel. Key timing parameters include a rise time of 120 ns, fall time of 60 ns, and propagation delay of 180 ns. It utilizes a 38-TSSOP package and functions within a temperature range of -20 °C to +85 °C.

Feature Summary

• Integrates a microstep translator for precise stepper motor control
• Provides dual full-bridge MOSFET gate driving capability
• Supports multiple resolution steps including 1, 1/2, 1/4, and 1/16

Applications

• Bipolar stepper motor control systems
• General-purpose motion control applications
• Microstepping drive circuits

Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging configuration when sourcing. Confirm that the 38-TSSOP footprint matches the target PCB layout requirements. Ensure compatibility with the specified 3 V to 5.5 V logic supply range for the intended controller interface.

Selection Notes

Select this component for applications requiring integrated microstep translation alongside dual bridge driving. Consider the 200 mA output current limit and 38-pin TSSOP package constraints. Evaluate thermal performance within the -20 °C to +85 °C operating range against system heat dissipation capabilities.

Part Context

This part belongs to the A4989 series of motor driver ICs designed for bipolar stepper motors. It combines power stage drivers with digital control logic in a single surface-mount package. The device simplifies design by integrating step and direction input processing directly with the gate drive outputs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.