NJM3771FM2 Equivalent & Substitute Parts

Part Overview

The NJM3771FM2 is a bipolar motor driver integrated circuit manufactured by Nisshinbo Micro Devices Inc., classified as a Power Management (PMIC) component. This device functions as a fully integrated motor driver with both control and power stage capabilities, designed for stepper motor applications with bipolar motor type support. The NJM3771FM2 operates with a supply voltage range of 4.75V to 5.25V and supports load voltages from 10V to 40V, delivering up to 650mA output current across four half-bridge configurations.

The NJM3771FM2 is currently classified as an obsolete product. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term system maintenance where original components are no longer readily available through standard distribution channels.

Substiute Parts

NJM3771FM2

Nisshinbo Micro Devices Inc.In Stock: 5686NJM3771FM2 Datasheet

Current PartRFQ

LV8734VL-TLM-H

onsemiIn Stock: 1095LV8734VL-TLM-H Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NJM3771FM2 is determined by strict alignment of the following critical parameters:

Motor Driver Type & Function: The substitute must support bipolar stepper motor driving with fully integrated control and power stage functionality.

Output Configuration: The substitute must provide four half-bridge output stages to maintain circuit topology compatibility.

Interface Type: The substitute must use parallel interface control to ensure compatibility with existing control circuitry.

Voltage Specifications: The substitute supply voltage range and load voltage range must encompass or closely align with the original specifications (Supply: 4.75V ~ 5.25V; Load: 10V ~ 40V).

Output Current Capability: The substitute must deliver sufficient output current (minimum 650mA) to support the intended motor load.

Mounting & Packaging: The substitute must be surface mount technology to maintain PCB assembly compatibility.

Compliance & Regulatory Status: The substitute must maintain RoHS compliance and REACH unaffected status.

Based on these criteria, the LV8734VL-TLM-H qualifies as a functional substitute for the NJM3771FM2.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The NJM3771FM2 is obsolete, making the LV8734VL-TLM-H the appropriate substitute for new designs and ongoing production support. The LV8734VL-TLM-H maintains active product status with onsemi, ensuring long-term availability and supply chain stability.

Compliance & Regulatory Alignment: Both components maintain RoHS compliance and REACH unaffected status, satisfying regulatory requirements for electronic component use in regulated industries. The LV8734VL-TLM-H meets ROHS3, the current RoHS standard revision.

Functional Compatibility: The LV8734VL-TLM-H provides bipolar stepper motor driving capability with four half-bridge outputs and parallel interface control, matching the core functional requirements of the NJM3771FM2. The substitute supports additional step resolutions (1/4, 1/8) and brushed DC motor operation, providing design flexibility beyond the original component.

Electrical Parameter Alignment: The substitute supply voltage range (0V ~ 5.5V) encompasses the original specification (4.75V ~ 5.25V). The load voltage range of the substitute (9V ~ 32V) overlaps the original range (10V ~ 40V) with a lower maximum specification. Applications requiring load voltages above 32V require design verification. The substitute output current (1.5A) exceeds the original specification (650mA), providing margin for motor load requirements.

Thermal Operating Range: The substitute operating temperature range (-40°C ~ 85°C ambient) differs from the original (-20°C ~ 125°C junction). Applications requiring operation above 85°C ambient or with junction temperatures exceeding 85°C require thermal analysis and design verification.

Packaging & Layout Impact: The substitute uses a 44-LSSOP package compared to the original 28-LCC package. PCB layout redesign is required for component substitution. The different pin count and package footprint necessitate schematic and layout modifications.

Moisture Handling: The substitute has MSL 3 rating (168 hours), requiring moisture control during storage and handling. Original component MSL 1 rating allows unlimited shelf life without moisture precautions. Substitute components require desiccant storage and bake-out procedures per IPC-A-610 standards before assembly.

Frequently Asked Questions (FAQ)

Q: Can the LV8734VL-TLM-H directly replace the NJM3771FM2 without PCB modifications?

A: No. The LV8734VL-TLM-H uses a 44-LSSOP package with different pin assignments compared to the NJM3771FM2 28-LCC package. PCB layout redesign and schematic modifications are required for substitution.

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

A: The LV8734VL-TLM-H provides higher output current (1.5A vs. 650mA), wider supply voltage range (0V ~ 5.5V vs. 4.75V ~ 5.25V), and additional step resolution options (1/4, 1/8). The load voltage maximum is lower (32V vs. 40V). Applications requiring 32V to 40V load operation require verification.

Q: Is the LV8734VL-TLM-H suitable for applications requiring -20°C to 125°C operation?

A: The LV8734VL-TLM-H ambient operating range is -40°C to 85°C. Applications requiring operation above 85°C ambient temperature require thermal analysis and design verification to confirm junction temperature compliance.

Q: What moisture handling procedures are required for the LV8734VL-TLM-H?

A: The LV8734VL-TLM-H has MSL 3 rating (168 hours). Components must be stored in desiccant packaging and require bake-out at 125°C for 24 hours before assembly if moisture absorption is suspected. Original component MSL 1 rating does not require these precautions.

Q: Does the LV8734VL-TLM-H support the same motor types as the NJM3771FM2?

A: The LV8734VL-TLM-H supports bipolar stepper motors (matching the original) and additionally supports brushed DC motor operation. Both components provide four half-bridge output configuration and parallel interface control.

Q: Are there compliance or regulatory differences between these components?

A: Both components are RoHS compliant and REACH unaffected. The LV8734VL-TLM-H meets ROHS3 (current standard), while the NJM3771FM2 meets RoHS (original standard). Both satisfy regulatory requirements for electronic component use.

Q: What is the inventory status of these components?

A: The NJM3771FM2 has 5591 pieces in stock as new original inventory. The LV8734VL-TLM-H has 1077 pieces in stock as new original inventory. Both components are available for immediate procurement.