LPC47B277-MS Equivalent & Substitute Parts

Part Overview

The LPC47B277-MS is a specialized interface controller manufactured by Microchip Technology, designed for LPC (Low Pin Count) interface applications. This 100-QFP surface mount device operates at 3.3V supply voltage and is classified as an obsolete product. Due to its obsolete status and limited availability for new production runs, identifying functionally compatible substitute components is essential for ongoing system support and design continuity.

Substiute Parts

LPC47B277-MS

Microchip TechnologyIn Stock: 1745LPC47B277-MS Datasheet

Current PartRFQ

W83627DHG-P

Nuvoton Technology CorporationIn Stock: 15815W83627DHG-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LPC47B277-MS is determined by the following critical parameters:

• Interface Type: LPC interface compatibility is mandatory for functional equivalence
• Voltage Supply: 3.3V operation requirement must be maintained
• Mounting Type: Surface mount technology for PCB assembly compatibility
• RoHS Compliance: ROHS3 compliance status for regulatory alignment
• Moisture Sensitivity Level: MSL 3 classification for handling and storage requirements

The W83627DHG-P qualifies as a substitute based on matching these core parameters. While the substitute features a different pin count (128-QFP versus 100-QFP) and manufacturer (Nuvoton Technology Corporation versus Microchip Technology), both devices maintain LPC interface functionality, 3.3V supply voltage, surface mount configuration, ROHS3 compliance, and identical MSL classification.

Parameter Comparison

Engineering Selection Recommendations

The W83627DHG-P serves as the manufacturer-recommended substitute for the LPC47B277-MS. Both components maintain ROHS3 compliance and identical MSL classification, ensuring regulatory and environmental handling requirements are preserved. The substitute operates at the same 3.3V supply voltage and maintains LPC interface compatibility.

The primary design consideration is the increased pin count of the W83627DHG-P (128-QFP versus 100-QFP). This difference requires PCB layout modification to accommodate the additional pins and altered footprint geometry. Both devices share identical package body dimensions (14x20mm), which may facilitate mechanical compatibility in certain applications, though electrical routing must be re-evaluated.

The W83627DHG-P carries a "Not For New Designs" status, indicating it is also in end-of-life phase. For applications requiring long-term component availability, consultation with component distributors regarding extended inventory or alternative LPC interface solutions is recommended.

Frequently Asked Questions (FAQ)

Q: Can the W83627DHG-P directly replace the LPC47B277-MS without PCB modification?

A: No. While both devices maintain LPC interface compatibility and identical supply voltage, the pin count difference (128 versus 100) requires PCB footprint redesign. The package body dimensions are identical (14x20mm), but pin assignments and routing must be re-evaluated.

Q: Are there compliance or handling differences between these components?

A: No. Both components are ROHS3 compliant and classified as MSL 3 (168 Hours), ensuring identical regulatory status and moisture sensitivity handling requirements.

Q: Why is the W83627DHG-P classified as "Not For New Designs" if it is a recommended substitute?

A: The "Not For New Designs" status indicates the W83627DHG-P is in end-of-life phase. It remains functionally suitable for replacement applications but is not recommended for new product development. Both the original LPC47B277-MS and its substitute are obsolete or near-obsolete components.

Q: What is the significance of the different ECCN and HTSUS codes between these parts?

A: ECCN (Export Control Classification Number) and HTSUS (Harmonized Tariff Schedule of the United States) codes reflect export control and tariff classification differences between manufacturers and product variants. These do not affect functional compatibility but may impact procurement and logistics processes.

Q: Are the package dimensions truly identical between 100-QFP and 128-QFP variants?

A: Both devices share identical body dimensions (14x20mm) as specified in the supplier device package information. The difference lies in pin count and pin spacing, requiring footprint redesign despite matching body size.