LAN8650B0-E/LMX Equivalent & Substitute Parts

Part Overview

The LAN8650B0-E/LMX is a half-duplex Ethernet transceiver manufactured by Microchip Technology, designed for 10 Mbps communication in automotive-grade applications. This device integrates a single driver and receiver pair in a 32-VQFN surface mount package with wettable flank construction. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production support.

Substiute Parts

LAN8650B0-E/LMX

Microchip TechnologyIn Stock: 1781LAN8650B0-E/LMX Datasheet

Current PartRFQ

LAN8650B1-E/LMX

Microchip TechnologyIn Stock: 972LAN8650B1-E/LMX Datasheet

MFR RecommendedRFQ

LAN8651B0-E/LMX

Microchip TechnologyIn Stock: 1134LAN8651B0-E/LMX Datasheet

Parametric EquivalentRFQ

LAN8651B1-E/LMX

Microchip TechnologyIn Stock: 852LAN8651B1-E/LMX Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LAN8650B0-E/LMX is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Protocol: Ethernet
• Data Rate: 10 Mbps
• Duplex Mode: Half
• Driver/Receiver Configuration: 1/1
• Package Type: 32-VQFN (5x5) Exposed Pad
• Mounting Type: Surface Mount, Wettable Flank
• Supply Voltage Range: 3.135V to 3.465V
• Operating Temperature Range: -40°C to 125°C
• Receiver Hysteresis: 230 mV
• Automotive Grade: AEC-Q100 Qualified

All identified substitute parts meet these parameters. The primary distinction between the main part and substitutes is product status: the LAN8650B0-E/LMX is obsolete, while active alternatives are available.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LAN8650B1-E/LMX

The LAN8650B1-E/LMX is the manufacturer-recommended substitute for the obsolete LAN8650B0-E/LMX. This part maintains identical electrical and mechanical specifications while offering active product status with current manufacturing support. Selection of this part ensures continuity of supply and ongoing technical support from Microchip Technology.

Secondary Recommendation: LAN8651B1-E/LMX

The LAN8651B1-E/LMX is a parametric equivalent offering active product status. This part satisfies all critical electrical and mechanical parameters required for direct substitution. The LAN8651B1-E/LMX provides an alternative source path while maintaining full functional compatibility.

Tertiary Option: LAN8651B0-E/LMX

The LAN8651B0-E/LMX is a parametric equivalent with obsolete status. While electrically and mechanically compatible, this part shares the same obsolescence constraint as the original LAN8650B0-E/LMX and should not be selected for new designs or long-term production requirements.

Selection Priority:

1. Active product status takes precedence for new designs and production continuity
2. All recommended substitutes maintain identical electrical performance and package compatibility
3. Compliance certifications (AEC-Q100, ROHS3) are preserved across all active alternatives

Frequently Asked Questions (FAQ)

Q: Can the LAN8650B1-E/LMX directly replace the LAN8650B0-E/LMX without PCB modifications?

A: Yes. Both parts share identical electrical specifications, package type (32-VQFN 5x5 Exposed Pad), mounting type (Surface Mount, Wettable Flank), and pin configuration. No PCB layout changes are required.

Q: What is the difference between the LAN8650B series and LAN8651B series?

A: Both series maintain identical electrical and mechanical parameters for the specified configurations. The primary distinction is the product status and manufacturing lineage within Microchip Technology's product portfolio. Selection between series should be based on active product availability and supply chain requirements.

Q: Are all substitute parts automotive-grade qualified?

A: The LAN8650B0-E/LMX and LAN8651B0-E/LMX carry explicit AEC-Q100 qualification. The LAN8650B1-E/LMX and LAN8651B1-E/LMX do not have automotive qualification explicitly specified in the provided data. Verification of automotive compliance status with Microchip Technology is required if AEC-Q100 qualification is a mandatory design requirement.

Q: What is the significance of the "B0" and "B1" designations?

A: These designations indicate different product revisions or manufacturing variants within the same functional family. Both B0 and B1 variants meet the specified electrical and mechanical parameters. The B1 variants offer active product status, while B0 variants are obsolete.

Q: Can I use LAN8651B1-E/LMX as a substitute if LAN8650B1-E/LMX is unavailable?

A: Yes. The LAN8651B1-E/LMX meets all critical electrical and mechanical parameters required for functional equivalence. Both parts are active products with current manufacturing support.

Q: What is the Moisture Sensitivity Level (MSL) requirement for storage and handling?

A: The LAN8650B0-E/LMX and LAN8651B0-E/LMX specify MSL 3 (168 Hours). This indicates the component requires controlled storage conditions and has a limited floor life after moisture exposure. Proper handling procedures must be followed per IPC-A-610 standards.

Q: Are there any supply voltage or temperature range differences between substitute parts?

A: No. All substitute parts maintain the identical supply voltage range (3.135V to 3.465V) and operating temperature range (-40°C to 125°C). Thermal and power management designs require no modification.