A3984SLP Equivalent & Substitute Parts

Part Overview

The A3984SLP 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 supply voltage range of 3V to 5.5V with load voltage capability from 8V to 35V, delivering up to 2A output current. The A3984SLP is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

A3984SLP

Allegro MicroSystemsIn Stock: 1474A3984SLP Datasheet

Current PartRFQ

TB6560AHQ,8

Toshiba Semiconductor and StorageIn Stock: 1000362TB6560AHQ,8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3984SLP is determined by the following critical parameters:

Motor driver architecture must support bipolar stepper motor control with fully integrated control and power stage functionality. Output configuration must provide four half-bridge outputs. The device must support multiple step resolutions including 1, 1/2, 1/4, and 1/16 stepping modes. Supply voltage range must accommodate the system's 3V to 5.5V requirement, though substitutes with narrower ranges (4.5V to 5.5V) are acceptable for systems operating within that window. Output current capability must meet or exceed 2A. Load voltage range must support 8V to 35V operation. Package form factor and mounting type may differ based on PCB design constraints, but the core electrical and functional specifications must align.

The TB6560AHQ,8 qualifies as a substitute based on these criteria, though with specific operational constraints noted in the parameter comparison.

Parameter Comparison

Engineering Selection Recommendations

The TB6560AHQ,8 serves as an active substitute for the obsolete A3984SLP. Key considerations for selection:

The TB6560AHQ,8 is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete A3984SLP. The substitute achieves ROHS3 compliance, addressing regulatory requirements that the original part does not meet.

Supply voltage range differs: the TB6560AHQ,8 operates from 4.5V to 5.5V, which is narrower than the A3984SLP's 3V to 5.5V range. Systems requiring operation below 4.5V supply voltage cannot use this substitute without additional voltage regulation.

Load voltage range is slightly reduced in the substitute (4.5V to 34V versus 8V to 35V), which is acceptable for most general-purpose applications but must be verified for systems requiring the full 35V load voltage capability.

Output current capability of the TB6560AHQ,8 (3A) exceeds the A3984SLP requirement (2A), providing design margin.

Operating temperature range differs significantly: the A3984SLP supports -20°C to 150°C (junction temperature), while the TB6560AHQ,8 operates from -30°C to 85°C (ambient temperature). Applications requiring operation above 85°C ambient or 150°C junction temperature cannot use this substitute.

Package and mounting type differ: the A3984SLP uses surface mount 24-TSSOP, while the TB6560AHQ,8 uses through-hole 25-SSIP. PCB redesign is required for mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TB6560AHQ,8 directly replace the A3984SLP without PCB modification?

A: No. The TB6560AHQ,8 uses a through-hole 25-SSIP package, while the A3984SLP uses surface mount 24-TSSOP. PCB layout redesign is required to accommodate the different package form factor and pin configuration.

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

A: The TB6560AHQ,8 requires a minimum supply voltage of 4.5V. Systems designed to operate at 3V or 3.3V supply voltage cannot use this substitute without additional voltage regulation or alternative component selection.

Q: Does the TB6560AHQ,8 support the same step resolution modes as the A3984SLP?

A: The TB6560AHQ,8 supports step resolutions of 1, 1/2, 1/4, 1/8, and 1/16. The A3984SLP supports 1, 1/2, 1/4, and 1/16. The substitute provides additional 1/8 step resolution capability.

Q: What are the temperature operating differences between these parts?

A: The A3984SLP operates from -20°C to 150°C (junction temperature), while the TB6560AHQ,8 operates from -30°C to 85°C (ambient temperature). The A3984SLP supports higher maximum temperatures. Applications requiring operation above 85°C ambient temperature require alternative components.

Q: Is the TB6560AHQ,8 RoHS compliant?

A: Yes. The TB6560AHQ,8 is ROHS3 compliant, whereas the A3984SLP is RoHS non-compliant. This makes the substitute suitable for applications with RoHS compliance requirements.

Q: What is the output current difference between these parts?

A: The A3984SLP delivers 2A maximum output current, while the TB6560AHQ,8 delivers 3A. The substitute provides 50% additional current capacity, suitable for higher motor torque applications or lower impedance motor windings.