F104S8A Equivalent & Substitute Parts

Part Overview

The F104S8A is a 2/2 Gigabit Ethernet transceiver manufactured by NXP USA Inc., housed in a 138-QFN (12x12) package with exposed pad. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system support and new design implementations. The transceiver provides dual channel functionality for Gigabit Ethernet applications with surface mount integration.

Substiute Parts

F104S8A

NXP USA Inc.In Stock: 2347F104S8A Datasheet

Current PartRFQ

VSC8514XMK-11

Microchip TechnologyIn Stock: 8559VSC8514XMK-11 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the F104S8A is determined by the following critical parameters:

• Package Compatibility: 138-QFN (12x12) with exposed pad footprint
• Mounting Type: Surface mount configuration
• Operating Temperature Range: 0°C ~ 125°C
• Moisture Sensitivity Level: MSL 3 (168 Hours)
• Functional Category: Ethernet interface transceiver
• Pin Count and Layout: 138-pin configuration

The VSC8514XMK-11 from Microchip Technology meets these substitution criteria through identical package geometry, thermal specifications, and moisture sensitivity classification. Both components utilize the same 138-VQFN exposed pad package and operate within the same temperature envelope.

Parameter Comparison

Engineering Selection Recommendations

The VSC8514XMK-11 is the designated manufacturer-recommended substitute for the F104S8A. Selection of this alternative is supported by:

• Identical Physical Footprint: Both components utilize the 138-QFN (12x12) package with exposed pad, ensuring direct PCB compatibility without layout modifications.
• Matching Thermal Specifications: Operating temperature range of 0°C ~ 125°C is identical across both parts.
• Consistent Moisture Handling: MSL 3 classification with 168-hour floor life requirement is maintained.
• Active Product Status: The VSC8514XMK-11 is in active production, ensuring long-term availability and supply chain stability compared to the obsolete F104S8A.
• Regulatory Compliance: Both components maintain REACH Unaffected status and identical HTSUS classification, supporting regulatory continuity.

Frequently Asked Questions (FAQ)

Q: Can the VSC8514XMK-11 be used as a direct replacement for the F104S8A without PCB modifications?

A: Yes. Both components share identical package geometry (138-QFN 12x12 with exposed pad) and pin count, enabling direct substitution without PCB layout changes.

Q: Are the operating temperature ranges compatible?

A: Yes. Both the F104S8A and VSC8514XMK-11 operate across the 0°C ~ 125°C temperature range, ensuring thermal compatibility in equivalent system environments.

Q: What is the significance of MSL 3 classification for both parts?

A: MSL 3 indicates a 168-hour floor life requirement. Both components must be stored and handled under controlled moisture conditions. This classification is identical for both the original and substitute part, maintaining equivalent moisture sensitivity management protocols.

Q: Does the substitute part maintain regulatory compliance?

A: Yes. The VSC8514XMK-11 maintains REACH Unaffected status and shares the same HTSUS code (8542.39.0001) as the F104S8A, ensuring regulatory continuity.

Q: Why is the F104S8A listed as obsolete?

A: The F104S8A has reached end-of-life status with NXP USA Inc. The VSC8514XMK-11 from Microchip Technology is actively produced and represents the current-generation equivalent for this application category.

Q: Are there packaging differences between the two parts?

A: No. Both components are supplied in the same 138-VQFN exposed pad package configuration with surface mount mounting type. Packaging specifications are identical.