A3980KLPTR-T Equivalent & Substitute Parts

Part Overview

The A3980KLPTR-T 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 voltage range and supports multiple step resolutions (1, 1/2, 1/8, 1/16). The part is classified as Not For New Designs, indicating it has reached end-of-life status. Finding equivalent or substitute components is necessary for ongoing production support, maintenance applications, and legacy system replacements where continued availability is required.

Substiute Parts

A3980KLPTR-T

Allegro MicroSystemsIn Stock: 36607A3980KLPTR-T Datasheet

Current PartRFQ

A3981KLPTR-T

Allegro MicroSystemsIn Stock: 40727A3981KLPTR-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3980KLPTR-T is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Bipolar stepper motor driver function with fully integrated control and power stage
• Half Bridge (4) output configuration
• DMOS technology platform
• Supply voltage range: 3V ~ 5.5V
• Operating temperature range: -40°C ~ 150°C (TJ)
• Automotive grade with AEC-Q100 qualification

Mechanical Compatibility Requirements:

• 28-TSSOP package with exposed pad
• Surface mount mounting type

Functional Flexibility:

• Interface type may vary (Logic vs. SPI/Step-Direction) based on application requirements
• Step resolution support may differ while maintaining core functionality
• Output current rating may exceed minimum requirements
• Load voltage range may differ if supply voltage compatibility is maintained

The A3981KLPTR-T qualifies as a manufacturer-recommended substitute based on matching the core electrical and mechanical parameters while offering enhanced interface capabilities and higher output current capacity.

Parameter Comparison

Engineering Selection Recommendations

The A3981KLPTR-T is the manufacturer-recommended substitute for the A3980KLPTR-T. Both devices maintain identical supply voltage specifications (3V ~ 5.5V), operating temperature range (-40°C ~ 150°C), automotive grade classification, and AEC-Q100 qualification. Both are packaged in the 28-TSSOP with exposed pad, ensuring direct mechanical compatibility.

The A3981KLPTR-T offers Active product status, providing long-term availability and manufacturing support compared to the Not For New Designs status of the A3980KLPTR-T. The substitute provides increased output current capacity (1.4A vs. 1A) and enhanced interface options (SPI and Step/Direction control vs. Logic interface), supporting broader application flexibility.

Load voltage range differs between the two devices (7V ~ 28V for A3981KLPTR-T vs. 7V ~ 50V for A3980KLPTR-T). Applications requiring load voltages exceeding 28V must evaluate this specification against system requirements. Step resolution support varies slightly (1/4 step available on A3981KLPTR-T vs. 1/8 step on A3980KLPTR-T), with both supporting 1, 1/2, and 1/16 step resolutions.

Frequently Asked Questions (FAQ)

Q: Can the A3981KLPTR-T directly replace the A3980KLPTR-T in existing designs?

A: Direct pin-level replacement is possible due to identical 28-TSSOP packaging. However, interface differences (Logic vs. SPI/Step-Direction) require firmware or control circuit evaluation. Load voltage specifications must be verified if applications exceed 28V.

Q: What are the key differences between these two parts?

A: The A3981KLPTR-T provides higher output current (1.4A vs. 1A), SPI and Step/Direction interface options (vs. Logic-only), and Active product status. The A3980KLPTR-T supports higher load voltages (up to 50V vs. 28V) and includes 1/8 step resolution (vs. 1/4 step on the substitute).

Q: Is the A3981KLPTR-T suitable for automotive applications?

A: Yes. Both devices carry Automotive grade classification and AEC-Q100 qualification, meeting automotive reliability and qualification standards.

Q: Are there any moisture sensitivity or handling differences?

A: Both parts have identical Moisture Sensitivity Level (MSL) rating of 2 (1 Year), requiring identical storage and handling procedures.

Q: What should be verified before implementing the A3981KLPTR-T as a substitute?

A: Verify that system load voltage does not exceed 28V. Confirm that the control interface can accommodate SPI or Step/Direction protocols, or that the device can operate in Logic mode if available. Validate that 1.4A output current meets or exceeds motor requirements.