LM5071MTX-50 Power Over Ethernet Controller - Equivalent & Substitute Parts

Part Overview

The LM5071MTX-50 is a Power Over Ethernet (PoE) controller IC designed for single-channel 802.3af compliant power delivery applications. This device functions as a controller with integrated DC/DC conversion capabilities, operating across a wide supply voltage range of 1.8V to 60V. The main part number LM5071MTX-50 is currently classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement.

Substiute Parts

LM5071MTX-50

Texas InstrumentsIn Stock: 3643LM5071MTX-50 Datasheet

Current PartRFQ

LM5071MTX-50/NOPB

Texas InstrumentsIn Stock: 2394LM5071MTX-50/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5071MTX-50 is determined by strict equivalence across the following critical parameters:

• Functional type: Controller (PD) with DC/DC conversion
• Single-channel architecture
• 802.3af PoE standard compliance
• Maximum power rating: 12.95 W
• Supply voltage range: 1.8V ~ 60V
• Package type: 16-TSSOP form factor
• Internal switch configuration: Both
• Auxiliary sense capability: Present
• Operating temperature range: -40°C ~ 125°C

The substitute part LM5071MTX-50/NOPB maintains identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM5071MTX-50/NOPB is the direct active equivalent for the obsolete LM5071MTX-50. Selection of the substitute part is justified by:

• Identical electrical performance across all specified parameters
• Identical mechanical compatibility and package footprint
• Active product status ensuring continued availability and manufacturing support
• ROHS3 compliance certification, meeting current regulatory requirements
• Maintained REACH unaffected status and EAR99 export classification

For applications currently using LM5071MTX-50, transition to LM5071MTX-50/NOPB requires no circuit redesign or layout modification.

Frequently Asked Questions (FAQ)

Q: Can LM5071MTX-50/NOPB be used as a direct replacement for LM5071MTX-50?

A: Yes. Both parts share identical electrical specifications, power ratings, supply voltage ranges, operating temperature ranges, and 16-TSSOP package dimensions. No circuit or PCB modifications are required.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" designation indicates the part is supplied without plumbum (lead-free), reflecting RoHS3 compliance. The base electrical and functional specifications remain unchanged.

Q: Are there any compliance differences between these parts?

A: The primary difference is RoHS status. LM5071MTX-50 is RoHS non-compliant, while LM5071MTX-50/NOPB is ROHS3 compliant. Both maintain REACH unaffected status and EAR99 export classification.

Q: Is the 16-TSSOP package footprint identical between both parts?

A: Yes. Both parts use the 16-TSSOP package with 0.173" width (4.40mm). PCB layouts are fully compatible without modification.

Q: Why is the original LM5071MTX-50 marked as obsolete?

A: Obsolescence typically reflects manufacturer discontinuation in favor of compliant variants. The LM5071MTX-50/NOPB represents the active continuation of this product line.

Q: What is the moisture sensitivity level for these parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.