A3967SLB-T Equivalent & Substitute Parts

Part Overview

The A3967SLB-T is a bipolar motor driver IC manufactured by Allegro MicroSystems, designed for stepper motor control applications. This device integrates control and power stage functionality in a 24-SOIC surface mount package, supporting step resolutions from full step to 1/8 microstepping. The A3967SLB-T is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity.

Substiute Parts

A3967SLB-T

Allegro MicroSystemsIn Stock: 32433A3967SLB-T Datasheet

Current PartRFQ

A3967SLBTR-T

Allegro MicroSystemsIn Stock: 42849A3967SLBTR-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3967SLB-T is determined by strict equivalence across the following electrical and mechanical parameters:

Motor driver type and control architecture must remain identical: bipolar stepper motor driver with fully integrated control and power stage.

Output configuration must match: Half Bridge (4) topology.

Step resolution capability must be maintained: 1, 1/2, 1/4, 1/8 microstepping support.

Electrical specifications must be equivalent: 750mA output current, 3V to 5.5V supply voltage, 4.75V to 30V load voltage range, and -20°C to 150°C operating temperature.

Package and mounting must be identical: 24-SOIC surface mount package with 0.295" (7.50mm) width.

The A3967SLBTR-T qualifies as a direct substitute based on these criteria. Both parts share the same base product number (A3967), identical electrical ratings, and compatible packaging specifications.

Parameter Comparison

Engineering Selection Recommendations

The A3967SLBTR-T is the direct active equivalent for the obsolete A3967SLB-T. Both parts maintain identical electrical specifications, output configuration, and package form factor. The primary distinction is product status: the A3967SLB-T is obsolete while the A3967SLBTR-T is active and currently in production.

Both parts carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The A3967SLBTR-T features a higher Moisture Sensitivity Level (MSL 3 versus MSL 1), indicating standard moisture handling requirements during storage and assembly.

For new designs and production applications, the A3967SLBTR-T is the appropriate selection due to its active status and continued availability.

Frequently Asked Questions (FAQ)

Q: Can the A3967SLBTR-T be used as a direct replacement for the A3967SLB-T?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical output current ratings (750mA), supply voltage range (3V to 5.5V), load voltage range (4.75V to 30V), step resolution capabilities (1, 1/2, 1/4, 1/8), and 24-SOIC package specifications. The A3967SLBTR-T is the active production equivalent.

Q: What is the difference between the A3967SLB-T and A3967SLBTR-T?

A: The primary difference is product status. The A3967SLB-T is obsolete, while the A3967SLBTR-T is active. Additionally, the A3967SLBTR-T has an MSL rating of 3 (168 hours) compared to MSL 1 (unlimited) for the A3967SLB-T. Both parts are otherwise electrically and mechanically identical.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the identical 24-SOIC package with 0.295" (7.50mm) width. Pinout and package dimensions are equivalent, allowing direct PCB substitution.

Q: What does the MSL difference mean for assembly and storage?

A: MSL 3 (168 hours) indicates the A3967SLBTR-T requires standard moisture control during storage and assembly. Components must be stored in dry conditions and used within 168 hours of opening the moisture barrier bag. MSL 1 (unlimited) for the A3967SLB-T indicates no moisture sensitivity restrictions. Both ratings are standard for surface mount ICs and do not affect electrical performance.

Q: Are both parts RoHS compliant?

A: Yes. Both the A3967SLB-T and A3967SLBTR-T are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.