A3959SLP-T Motor Driver IC - Equivalent & Substitute Parts

Part Overview

The A3959SLP-T is a brushed DC motor driver IC manufactured by Allegro MicroSystems, designed for general-purpose motor control applications. This integrated circuit combines control and power stage functionality in a 28-TSSOP package with exposed pad, operating across a 4.5V to 5.5V supply voltage range with load voltage capability up to 50V.

The A3959SLP-T is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this motor driver architecture.

Substiute Parts

A3959SLP-T

Allegro MicroSystemsIn Stock: 811A3959SLP-T Datasheet

Current PartRFQ

A3959SLPTR-T

Allegro MicroSystemsIn Stock: 8011A3959SLPTR-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A3959SLP-T is determined by strict alignment across the following critical parameters:

Motor driver type and control architecture (brushed DC, fully integrated control and power stage), output configuration (half bridge with 2 outputs), interface protocol (parallel), semiconductor technology (DMOS), electrical ratings (3A output current, 4.5V–5.5V supply, 9.5V–50V load voltage), thermal operating range (-20°C to 150°C junction temperature), package form factor (28-TSSOP with exposed pad), and surface mount compatibility.

The A3959SLPTR-T qualifies as a direct substitute based on identical alignment across all these parameters. The primary distinction between the main part and its substitute relates to product status and packaging format availability.

Parameter Comparison

Engineering Selection Recommendations

The A3959SLPTR-T is the manufacturer-recommended substitute for the obsolete A3959SLP-T. Both parts maintain identical electrical and mechanical specifications, ensuring direct functional compatibility in existing circuit designs.

Selection between these parts should be based on product availability and supply chain status. The A3959SLP-T, classified as obsolete, presents supply continuity risk. The A3959SLPTR-T carries active product status with significantly higher inventory availability (7951 units versus 752 units), supporting long-term procurement reliability.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications. The MSL rating difference (1 versus 2) reflects standard moisture sensitivity classification and does not impact functional performance in typical operating environments.

Frequently Asked Questions (FAQ)

Q: Can the A3959SLPTR-T be used as a direct replacement for the A3959SLP-T in existing designs?

A: Yes. The A3959SLPTR-T is electrically and mechanically identical to the A3959SLP-T across all critical parameters: output current (3A), supply voltage (4.5V–5.5V), load voltage (9.5V–50V), operating temperature range (-20°C to 150°C), package form factor (28-TSSOP with exposed pad), and interface protocol (parallel). No circuit modifications are required.

Q: What is the primary difference between these two parts?

A: The A3959SLP-T is obsolete, while the A3959SLPTR-T is active. The substitute offers superior supply chain availability and is the manufacturer-recommended alternative for new designs and ongoing production.

Q: Are there packaging format differences between the main part and substitute?

A: The A3959SLPTR-T is available in Cut Tape (CT) and Digi-Reel® formats, providing flexible procurement options. Both parts use the same 28-TSSOP package with exposed pad for surface mount assembly.

Q: Do compliance certifications differ between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. Regulatory compliance is equivalent across both options.

Q: What does the MSL rating difference indicate?

A: The A3959SLP-T carries MSL 1 (unlimited moisture sensitivity), while the A3959SLPTR-T carries MSL 2 (1-year moisture sensitivity). This reflects standard component classification and does not affect performance in standard operating conditions or typical storage environments.