A3964SLBTR Equivalent & Substitute Parts

Part Overview

The A3964SLBTR is a bipolar motor driver IC manufactured by Allegro MicroSystems, designed for fully integrated control and power stage applications in stepper motor systems. This device operates as a half-bridge configuration with parallel interface control, supporting output currents up to 800mA across a supply voltage range of 4.75V to 5.25V and load voltages from 5V to 30V.

The A3964SLBTR is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Substiute Parts

A3964SLBTR

Allegro MicroSystemsIn Stock: 2204A3964SLBTR Datasheet

Current PartRFQ

LV8734VL-TLM-H

onsemiIn Stock: 1095LV8734VL-TLM-H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3964SLBTR is determined by the following critical parameters:

Motor driver functionality requires matching of motor type (bipolar stepper), output configuration (half bridge with 4 outputs), and control interface (parallel). The substitute part must support fully integrated control and power stage operation.

Electrical compatibility is established through:

• Output current capability equal to or exceeding 800mA
• Supply voltage range that encompasses or extends the original 4.75V to 5.25V specification
• Load voltage range compatible with 5V to 30V operation

Physical and environmental constraints include surface mount packaging suitable for PCB integration and operating temperature range adequate for the application environment.

The LV8734VL-TLM-H from onsemi meets these substitution criteria through equivalent motor driver architecture, enhanced electrical specifications, and active product status with modern compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LV8734VL-TLM-H is suitable as a substitute for the A3964SLBTR based on the following engineering criteria:

Functional Equivalence: Both devices provide fully integrated bipolar motor driver functionality with half-bridge output configuration and parallel control interface, meeting core application requirements.

Electrical Compatibility: The LV8734VL-TLM-H output current of 1.5A exceeds the A3964SLBTR specification of 800mA, providing design margin. Supply voltage range of 0V to 5.5V encompasses the original 4.75V to 5.25V requirement. Load voltage range of 9V to 32V extends beyond the original 5V to 30V specification.

Product Status and Compliance: The LV8734VL-TLM-H maintains active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The A3964SLBTR obsolete status necessitates transition to an actively supported alternative.

Package Consideration: The LV8734VL-TLM-H uses 44-LSSOP packaging versus the A3964SLBTR 20-SOIC package. PCB layout redesign is required to accommodate the different pin count and package footprint.

Frequently Asked Questions (FAQ)

Q: Can the LV8734VL-TLM-H directly replace the A3964SLBTR without PCB modification?

A: No. The LV8734VL-TLM-H uses 44-LSSOP packaging with 44 pins, while the A3964SLBTR uses 20-SOIC packaging with 20 pins. PCB layout redesign and schematic modification are required. Pin function mapping must be verified against both device datasheets.

Q: What are the key electrical differences between these devices?

A: The LV8734VL-TLM-H provides higher output current (1.5A versus 800mA), wider supply voltage range (0V to 5.5V versus 4.75V to 5.25V), and extended load voltage range (9V to 32V versus 5V to 30V). These differences provide enhanced design flexibility and performance margin.

Q: Why is the operating temperature range different?

A: The A3964SLBTR specifies junction temperature (TJ) range of -20°C to 150°C, while the LV8734VL-TLM-H specifies ambient temperature (TA) range of -40°C to 85°C. These represent different measurement methodologies. Application thermal requirements must be evaluated against both specifications.

Q: Are there compliance differences between these parts?

A: Yes. The A3964SLBTR is RoHS non-compliant, while the LV8734VL-TLM-H is ROHS3 compliant. For applications requiring RoHS compliance, the LV8734VL-TLM-H is the appropriate selection. Both parts are REACH unaffected and classified as EAR99.

Q: What is the moisture sensitivity difference?

A: The A3964SLBTR has MSL 1 (unlimited shelf life), while the LV8734VL-TLM-H has MSL 3 (168-hour floor life after moisture exposure). Storage and handling procedures must account for the LV8734VL-TLM-H moisture sensitivity level.

Q: Does the LV8734VL-TLM-H support step resolution control?

A: Yes. The LV8734VL-TLM-H supports step resolution options of 1, 1/2, 1/4, and 1/8. The A3964SLBTR does not specify step resolution capability. This additional functionality may be utilized or disabled depending on application requirements.