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A4985SESTR-T The Allegro MicroSystems A4985SESTR-T is a DMOS microstepping motor driver with an integrated translator. It operates bipolar stepper motors in full, half, quarter, and eighth step modes.
Mfr Part #:

A4985SESTR-T

Available from 5 distributors
Mfr Name: Allegro Microsystems
Allegro Microsystems
The Allegro MicroSystems A4985SESTR-T is a DMOS microstepping motor driver with an integrated translator. It operates bipolar stepper motors in full, half, quarter, and eighth step modes.
✓ Total Stock: 22,453 pcs
$ Price Range: $2.25

A4985SESTR-T Available from 5 distributors

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✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
PROSOFT ELECTRONICS ✓
Non-Authorised Inventory information
10,280 pcs
On Request
10280 pcs On Request 1 On Request On Request 21+ On Request On Request
Risen Electronics ✓
Non-Authorised Inventory information
5,000 pcs
On Request
5000 pcs On Request 1 On Request On Request On Request On Request 2026-02-16 21:33:16
Flip Electronics ✓
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3,000 pcs
On Request
3000 pcs On Request 1 On Request On Request On Request On Request On Request
Smaxon Electronics ✓
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2,173 pcs
On Request
2173 pcs On Request 1 On Request On Request 21+ On Request On Request
Optech Co.,Limited ✓
Non-Authorised Inventory information
2,000 pcs
On Request
2000 pcs On Request 1 On Request On Request 21+ On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

A4985SESTR-T Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Applications
Current
Function
Interface
Motor Type
Mounting Type
Operating Temperature
Output Configuration
Step Resolution
Supplier Device Package
Technology
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A4985SESTR-T Description

Short technical summary and product information.

The A4985SESTR-T from Allegro MicroSystems is a complete microstepping motor driver with a built-in translator, designed for easy operation of bipolar stepper motors. It supports full, half, quarter, and eighth step modes, selectable via MSx logic inputs.

 

This driver features an output drive capacity of up to 35V and ±1A. It includes a fixed off-time current regulator capable of operating in Slow or Mixed decay modes. Mixed decay mode results in reduced audible motor noise, increased step accuracy, and reduced power dissipation. The device is compatible with 3.3V and 5V logic supply.

 

Key features include low RDS(ON) outputs, automatic current decay mode detection, synchronous rectification for low power dissipation, internal UVLO, crossover-current protection, thermal shutdown circuitry, and short-to-ground/load protection. It also offers a low current sleep mode with consumption less than 10 µA.

 

The A4985SESTR-T is available in a 24-QFN (4x4mm) package with an exposed thermal pad, suitable for surface mounting. The ET package variant meets no-smoke no-fire (NSNF) compliance requirements.

A4985SESTR-T Quick Information

Product Type: Motor Driver
Canonical Name: A4985SESTR-T DMOS Microstepping Driver with Integrated Translator and Current Control
Subcategory: Motor Drivers, Controllers

A4985SESTR-T Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

A4985SESTR-T Estimated Pricing

Qty Low High
1+ $2.25 $2.25

Estimated market price range - modelled values for guidance only, not live distributor offers.

A4985SESTR-T Features

  • Integrated translator for easy operation.
  • Supports multiple microstepping resolutions.
  • 8V to 35V motor supply voltage.
  • ±1A continuous output current.
  • Low power sleep mode (< 10 µA).

A4985SESTR-T Applications

  • Ideal for bipolar stepper motor control.
  • Suitable for full, half, and microstepping.
  • Applications with limited microprocessor resources.
  • Low noise and high accuracy motor control.

A4985SESTR-T FAQs

7 frequently asked questions generated from this part’s specifications.
What is the output drive capacity of the A4985SESTR-T?

The output drive capacity is ±1 A.

What is the motor supply voltage range for the A4985SESTR-T?

The motor supply voltage range is 8V to 35V.

What step resolutions does the A4985SESTR-T support?

It supports full-step, half-step, quarter-step, and 1/8-step resolutions.

What is the operating temperature range of the A4985SESTR-T?

The operating junction temperature range is -20°C to 150°C.

What package does the A4985SESTR-T come in?

It is available in a 24-QFN (4x4) package with an exposed pad.

What is the sleep mode current of the A4985SESTR-T?

The sleep mode current is less than 10 µA.

What logic supply voltages does the A4985SESTR-T accept?

It accepts 3.3V or 5V logic supply voltages.

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