LM629MX-8 Equivalent & Substitute Parts

Part Overview

The LM629MX-8 is a motor driver integrated circuit manufactured by Texas Instruments, designed for brushless DC (BLDC) servo and brushed DC servo motor control applications. It functions as a commutation and direction management controller with a pre-driver half-bridge output configuration, operating across a 4.5V to 5.5V supply voltage range in a 24-SOIC surface mount package.

The LM629MX-8 carries an obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this motor driver architecture.

Substiute Parts

LM629MX-8

Texas InstrumentsIn Stock: 865LM629MX-8 Datasheet

Current PartRFQ

LM629MX-8/NOPB

Texas InstrumentsIn Stock: 2121LM629MX-8/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM629MX-8 is determined by strict equivalence across the following critical parameters:

Motor control capability (BLDC servo and brushed DC servo support), commutation and direction management function, pre-driver half-bridge output configuration, parallel interface architecture, 4.5V to 5.5V supply voltage specification, -40°C to 85°C operating temperature range, surface mount technology, and 24-SOIC package form factor.

The LM629MX-8/NOPB qualifies as a direct substitute based on identical alignment across all these parameters. The primary distinction between the main part and its substitute relates to product status and regulatory compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM629MX-8/NOPB is the direct substitute for the obsolete LM629MX-8. Both parts maintain identical electrical and mechanical specifications across all motor control parameters, package configuration, and thermal operating range.

The LM629MX-8/NOPB offers two significant advantages: active product status ensures ongoing availability and manufacturer support, and ROHS3 compliance satisfies modern regulatory requirements for new designs and production environments where RoHS compliance is mandated.

Selection between these parts should be based on supply chain requirements and regulatory compliance obligations. For new designs or systems requiring RoHS certification, the LM629MX-8/NOPB is the appropriate choice. For legacy system maintenance where RoHS compliance is not a constraint, either part functions identically within the specified electrical and thermal parameters.

Frequently Asked Questions (FAQ)

Q: Are the LM629MX-8 and LM629MX-8/NOPB electrically identical?

A: Yes. Both parts share identical electrical specifications for motor control function, supply voltage range (4.5V to 5.5V), operating temperature range (-40°C to 85°C), output configuration (pre-driver half-bridge), and interface architecture (parallel). They are direct functional equivalents.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and regulatory compliance. The LM629MX-8 is obsolete and RoHS non-compliant. The LM629MX-8/NOPB is active and ROHS3 compliant. The "/NOPB" suffix indicates lead-free (Pb-free) processing.

Q: Can I use LM629MX-8/NOPB as a drop-in replacement for LM629MX-8?

A: Yes. Both parts use the 24-SOIC package with identical pinout and electrical characteristics. No circuit modifications or PCB redesign is required for substitution.

Q: Why should I choose LM629MX-8/NOPB over LM629MX-8?

A: The LM629MX-8/NOPB offers active product status, ensuring continued availability and manufacturer technical support. ROHS3 compliance satisfies regulatory requirements in jurisdictions where RoHS certification is mandatory for electronic components.

Q: Are there any thermal or reliability differences between these parts?

A: No. Both parts operate across the identical temperature range (-40°C to 85°C) and share the same moisture sensitivity level (MSL 3, 168 hours). Thermal and reliability characteristics are equivalent.

Q: What is the 24-SOIC package specification?

A: The 24-SOIC package is a surface mount integrated circuit package with 24 pins, 0.295 inches (7.50mm) in width. This package form factor is identical for both the LM629MX-8 and LM629MX-8/NOPB.