NJM3771D2 Equivalent & Substitute Parts

Part Overview

The NJM3771D2 is a bipolar motor driver integrated circuit manufactured by Nisshinbo Micro Devices Inc., designed for stepper motor and brushed DC motor control applications. This device integrates control and power stage functionality in a 22-DIP through-hole package, operating from a 4.75V to 5.25V supply with load voltage capability of 10V to 40V.

The NJM3771D2 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term product maintenance and repair operations.

Substiute Parts

NJM3771D2

Nisshinbo Micro Devices Inc.In Stock: 2383NJM3771D2 Datasheet

Current PartRFQ

LV8734VL-TLM-H

onsemiIn Stock: 1095LV8734VL-TLM-H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NJM3771D2 is determined by the following critical parameters:

Functional Compatibility:

• Motor type support (bipolar stepper motor capability)
• Output configuration (half bridge with 4 outputs)
• Parallel interface for control signals
• Integrated control and power stage architecture

Electrical Compatibility:

• Output current rating must meet or exceed 650mA
• Supply voltage range must encompass or overlap with 4.75V ~ 5.25V
• Load voltage range must support 10V ~ 40V operation
• Step resolution must support at minimum 1 and 1/2 step modes

Environmental & Compliance:

• Operating temperature range must cover the application requirements
• RoHS compliance status for regulatory alignment

The LV8734VL-TLM-H qualifies as a substitute based on these parameters, though physical integration considerations apply due to packaging differences.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The LV8734VL-TLM-H provides functional equivalence for bipolar stepper motor and brushed DC motor control applications. The substitute part meets or exceeds the electrical performance requirements of the NJM3771D2 in terms of output current capacity and supply voltage range.

Critical Integration Considerations:

1. Packaging Transition: The NJM3771D2 uses through-hole 22-DIP packaging, while the LV8734VL-TLM-H uses surface-mount 44-LSSOP packaging. This difference requires PCB redesign and assembly process modification.

2. Load Voltage Range: The LV8734VL-TLM-H load voltage maximum of 32V is lower than the NJM3771D2 specification of 40V. Applications requiring load voltages above 32V cannot use this substitute without additional external circuit modifications.

3. Operating Temperature: The NJM3771D2 junction temperature range extends to 125°C, while the LV8734VL-TLM-H ambient temperature range extends only to 85°C. High-temperature applications must verify thermal compatibility.

4. Product Status: The LV8734VL-TLM-H is actively manufactured by onsemi, ensuring long-term availability and supply chain stability compared to the obsolete NJM3771D2.

5. Compliance: Both parts maintain RoHS compliance, supporting regulatory requirements for new designs and manufacturing operations.

Frequently Asked Questions (FAQ)

Q: Can the LV8734VL-TLM-H directly replace the NJM3771D2 without PCB modification?

A: No. The LV8734VL-TLM-H uses a different package type (44-LSSOP surface mount versus 22-DIP through hole) and has a different pin count. PCB redesign and layout modification are required.

Q: What is the primary advantage of substituting to the LV8734VL-TLM-H?

A: The LV8734VL-TLM-H is an active product with ongoing manufacturing support, ensuring component availability. The NJM3771D2 is obsolete and subject to supply discontinuation.

Q: Are there electrical performance differences between these parts?

A: The LV8734VL-TLM-H provides higher output current (1.5A versus 650mA) and supports additional step resolution modes (1/4 and 1/8 steps). The load voltage maximum is lower (32V versus 40V), which may limit applications requiring higher load voltages.

Q: Which part is suitable for high-temperature applications above 100°C?

A: The NJM3771D2 supports junction temperatures to 125°C. The LV8734VL-TLM-H is rated to 85°C ambient temperature. For applications exceeding 85°C ambient, the NJM3771D2 specification is more suitable, though availability is limited due to obsolescence.

Q: Do both parts support the same motor control interface?

A: Yes. Both parts use parallel interface control and support bipolar stepper motor operation with 1 and 1/2 step resolution modes. The LV8734VL-TLM-H additionally supports 1/4 and 1/8 step resolutions.

Q: What compliance certifications apply to both parts?

A: Both parts are RoHS compliant and REACH unaffected. The LV8734VL-TLM-H carries ROHS3 certification, which is the current standard. Both parts are classified under ECCN EAR99 and HTSUS 8542.39.0001.