NJM3773FM2 Equivalent & Substitute Parts

Part Overview

The NJM3773FM2 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 NJM3773FM2 is currently classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing design support, maintenance, and new production requirements where legacy component sourcing becomes unavailable.

Substiute Parts

NJM3773FM2

Nisshinbo Micro Devices Inc.In Stock: 110123NJM3773FM2 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 NJM3773FM2 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 architecture.

Output Configuration: The substitute must provide half-bridge (4) output configuration to maintain electrical compatibility with existing motor control topologies.

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

Output Current Capability: The substitute must meet or exceed the 750mA output current specification of the original device.

Supply Voltage Range: The substitute must operate within or encompass the 4.75V to 5.25V supply voltage range.

Load Voltage Range: The substitute must support the 10V to 40V load voltage operating window.

Mounting Type: The substitute must be surface mount to maintain PCB assembly compatibility.

Regulatory Compliance: The substitute must maintain RoHS compliance status for continued use in regulated applications.

The LV8734VL-TLM-H from onsemi meets these substitution criteria while offering enhanced capabilities in step resolution and output current capacity.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The NJM3773FM2 is classified as obsolete, indicating discontinued manufacturing and limited availability. The LV8734VL-TLM-H is an active product with current manufacturing support, ensuring long-term component availability and supply chain reliability.

Regulatory Compliance: Both components maintain RoHS compliance. The LV8734VL-TLM-H meets ROHS3 standard, representing current regulatory alignment. Both components are REACH Unaffected and classified under ECCN EAR99.

Functional Equivalence: The LV8734VL-TLM-H provides functional equivalence for bipolar stepper motor driving applications with parallel interface control. The substitute maintains the critical half-bridge (4) output configuration and fully integrated control and power stage architecture.

Performance Enhancements: The LV8734VL-TLM-H offers increased output current capacity (1.5A versus 750mA) and extended step resolution options (1, 1/2, 1/4, 1/8 versus 1, 1/2), providing design flexibility for enhanced motor control precision.

Design Constraints: The substitute operates within a lower maximum load voltage range (32V versus 40V) and lower maximum junction temperature (85°C versus 125°C). The package change from 28-LCC to 44-LSSOP requires PCB layout modification. The substitute requires controlled moisture storage (MSL 3, 168 hours) compared to the original device (MSL 1, unlimited).

Supply Voltage Compatibility: The LV8734VL-TLM-H supply voltage range (0V ~ 5.5V) encompasses the original specification (4.75V ~ 5.25V), ensuring direct compatibility in standard 5V supply applications.

Frequently Asked Questions (FAQ)

Q: Can the LV8734VL-TLM-H directly replace the NJM3773FM2 without PCB modification?

A: No. While both devices are surface mount components, the package types differ significantly. The NJM3773FM2 uses 28-LCC (J-Lead) packaging, while the LV8734VL-TLM-H uses 44-LSSOP packaging. PCB layout modification is required, including footprint redesign and trace routing adjustments.

Q: What are the critical electrical parameters that must align for substitution?

A: The substitute must maintain bipolar stepper motor driver functionality, half-bridge (4) output configuration, parallel interface control, and surface mount mounting type. The substitute must support output current of at least 750mA, supply voltage encompassing 4.75V to 5.25V, and load voltage within the 10V to 40V range.

Q: Does the LV8734VL-TLM-H support the same step resolution as the NJM3773FM2?

A: The LV8734VL-TLM-H supports the original step resolutions (1, 1/2) plus additional options (1/4, 1/8). Existing designs using 1 or 1/2 step resolution remain compatible. The extended resolution options provide additional capability for new designs.

Q: What is the impact of the different operating temperature ranges?

A: The NJM3773FM2 operates to 125°C junction temperature, while the LV8734VL-TLM-H operates to 85°C ambient temperature. Applications requiring operation above 85°C ambient or with high thermal loads may require thermal analysis to confirm the substitute is suitable.

Q: How does the increased output current of the LV8734VL-TLM-H affect design compatibility?

A: The 1.5A output current of the LV8734VL-TLM-H exceeds the 750mA specification of the original device. This provides design margin for motor driving applications. Existing designs rated for 750mA operation remain compatible. Higher current capability does not create incompatibility with lower-current motor loads.

Q: What is the significance of the different load voltage ranges?

A: The NJM3773FM2 supports 10V to 40V load voltage. The LV8734VL-TLM-H supports 9V to 32V load voltage. Applications operating at load voltages between 32V and 40V cannot use the substitute. Applications operating within 9V to 32V range are compatible with both devices.

Q: Does the moisture sensitivity level difference affect component handling?

A: The NJM3773FM2 has MSL 1 (unlimited shelf life without moisture control). The LV8734VL-TLM-H has MSL 3 (168-hour floor life after moisture exposure). The substitute requires controlled storage conditions and has a defined floor life after opening moisture-sealed packaging. Standard ESD and moisture control procedures must be followed during assembly.

Q: Are there supply chain advantages to using the LV8734VL-TLM-H?

A: Yes. The LV8734VL-TLM-H is an active product with current manufacturing support from onsemi. The NJM3773FM2 is obsolete with limited remaining inventory. The substitute provides long-term component availability and supply chain continuity for ongoing production and maintenance applications.