A3982SLB Equivalent & Substitute Parts

Part Overview

The A3982SLB is a bipolar stepper motor driver IC manufactured by Allegro MicroSystems, designed for fully integrated motor control and power stage applications. This device operates across a 3V to 5.5V supply range and supports load voltages from 8V to 35V, delivering 2A output current with DMOS technology. The A3982SLB is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

A3982SLB

Allegro MicroSystemsIn Stock: 3388A3982SLB Datasheet

Current PartRFQ

TB6560AHQ,8

Toshiba Semiconductor and StorageIn Stock: 1000362TB6560AHQ,8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3982SLB is determined by the following critical parameters:

• Motor type classification: Bipolar stepper motor driver capability
• Output configuration: Half Bridge (4) topology for dual-channel motor control
• Functional integration: Fully integrated control and power stage
• Current capacity: Minimum 2A output current requirement
• Supply voltage range: Compatibility with 3V to 5.5V logic supply
• Load voltage range: Support for 8V to 35V motor supply
• Interface type: Logic or parallel control interface
• Thermal operating range: Minimum -20°C to 150°C capability

The TB6560AHQ,8 qualifies as a substitute based on matching motor type, output configuration, functional integration, and interface capability. However, specific parameter differences exist that must be evaluated for application compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TB6560AHQ,8 serves as a functional substitute for the obsolete A3982SLB in bipolar stepper motor driver applications. Selection of this alternative is supported by the following engineering factors:

Product Status: The TB6560AHQ,8 maintains active product status with ongoing manufacturer support, whereas the A3982SLB is obsolete and subject to inventory depletion.

Compliance: The TB6560AHQ,8 is ROHS3 compliant, meeting current regulatory requirements for electronic components in regulated markets. The A3982SLB is RoHS non-compliant, limiting its use in new designs subject to RoHS directives.

Functional Equivalence: Both devices provide fully integrated bipolar stepper motor driver functionality with half-bridge output configuration and logic/parallel control interfaces suitable for general-purpose motor control applications.

Parameter Considerations: The TB6560AHQ,8 offers enhanced step resolution capability (1, 1/2, 1/4, 1/8, 1/16 versus 1, 1/2) and higher output current (3A versus 2A). Supply voltage range is narrower (4.5V to 5.5V versus 3V to 5.5V), requiring verification for applications operating below 4.5V. Load voltage range is slightly reduced (4.5V to 34V versus 8V to 35V). Operating temperature range differs significantly (−30°C to 85°C ambient versus −20°C to 150°C junction), requiring thermal analysis for high-temperature applications.

Package Transition: The TB6560AHQ,8 uses through-hole mounting (25-SSIP) versus surface-mount (24-SOIC), necessitating PCB redesign for mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TB6560AHQ,8 directly replace the A3982SLB without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (24-SOIC surface mount versus 25-SSIP through-hole) and pin configurations. PCB redesign is required. Additionally, the TB6560AHQ,8 uses parallel interface control versus logic interface, requiring control signal adaptation.

Q: What is the minimum supply voltage requirement for the TB6560AHQ,8?

A: The TB6560AHQ,8 operates with a minimum supply voltage of 4.5V. Applications requiring 3V to 4.5V operation with the A3982SLB cannot use this substitute without alternative solutions.

Q: Does the TB6560AHQ,8 support the same step resolution as the A3982SLB?

A: The TB6560AHQ,8 supports extended step resolution (1, 1/2, 1/4, 1/8, 1/16) compared to the A3982SLB (1, 1/2). This enhanced capability is backward compatible with applications using 1 or 1/2 step resolution.

Q: What are the thermal operating differences between these devices?

A: The A3982SLB specifies junction temperature range (−20°C to 150°C TJ), while the TB6560AHQ,8 specifies ambient temperature range (−30°C to 85°C TA). These represent different measurement points and cannot be directly compared. Applications requiring operation above 85°C ambient or 150°C junction require thermal analysis specific to the operating environment.

Q: Is the TB6560AHQ,8 suitable for new product designs?

A: Yes. The TB6560AHQ,8 is an active product with ROHS3 compliance, making it appropriate for new designs. The A3982SLB, being obsolete and RoHS non-compliant, is not recommended for new product development.

Q: What load voltage range should be used for the TB6560AHQ,8?

A: The TB6560AHQ,8 supports load voltages from 4.5V to 34V. Applications requiring load voltages below 4.5V or above 34V exceed the specified operating range and require alternative component selection.