SM668PXB-ACS Equivalent & Substitute Parts

Part Overview

The SM668PXB-ACS is a Ferri-eMMC BGA 153-B eMMC 5.0 memory IC manufactured by Silicon Motion, Inc. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and component procurement. The part operates within industrial temperature ranges and meets ROHS3 compliance requirements. Due to its obsolete status, alternative components from the same manufacturer's active product line are necessary to maintain design continuity and ensure long-term supply chain viability.

Substiute Parts

SM668PXB-ACS

Silicon Motion, Inc.In Stock: 1344SM668PXB-ACS Datasheet

Current PartRFQ

SM662PXC BEST

Silicon Motion, Inc.In Stock: 1074SM662PXC BEST Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SM662PXC is identified as the manufacturer-recommended substitute for the SM668PXB-ACS. Substitution eligibility is determined by the following critical parameters:

• Manufacturer Consistency: Both parts are manufactured by Silicon Motion, Inc., ensuring design compatibility and support continuity
• Memory Category: Both components function as memory ICs within the eMMC product family
• Compliance Alignment: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements
• Moisture Sensitivity: Both components share MSL 3 (168 Hours) rating, indicating identical handling and storage requirements
• Export Classification: Both parts carry the same ECCN code (3A991B1A), confirming equivalent export control status

The SM662PXC transitions from the obsolete SM668 series to the active SM662 series, providing continued access to functionally equivalent eMMC memory technology with active manufacturer support.

Parameter Comparison

Engineering Selection Recommendations

The SM662PXC is the designated manufacturer-recommended substitute for the obsolete SM668PXB-ACS. Selection of this substitute is supported by:

• Active Product Status: The SM662PXC maintains active product status with Silicon Motion, Inc., ensuring continued availability, technical support, and manufacturing consistency
• Regulatory Compliance: Both components satisfy ROHS3 and REACH requirements, maintaining compliance with current environmental and export regulations
• Identical Handling Requirements: Matching MSL 3 (168 Hours) ratings ensure equivalent moisture control and storage protocols during component handling and assembly
• Export Control Alignment: Identical ECCN classification (3A991B1A) confirms equivalent export control treatment and supply chain documentation requirements
• Manufacturer Support: Direct manufacturer recommendation establishes engineering validation and ongoing support for this substitution path

Frequently Asked Questions (FAQ)

Q: Why is the SM668PXB-ACS classified as obsolete? A: The SM668PXB-ACS has reached end-of-life status within Silicon Motion's product portfolio. The manufacturer has transitioned this product line to the SM662 series, which provides equivalent functionality with active support and continued availability.

Q: What are the key compatibility factors between SM668PXB-ACS and SM662PXC? A: Compatibility is established through shared memory interface (eMMC), identical compliance certifications (ROHS3, REACH Unaffected), matching moisture sensitivity levels (MSL 3), and equivalent export classification (ECCN 3A991B1A). Both components are surface-mount BGA packages manufactured by Silicon Motion, Inc.

Q: Are there packaging differences between these parts? A: The SM668PXB-ACS uses BGA 153-B packaging, while the SM662PXC uses 100-BGA (14x18) packaging. Package geometry differences require PCB layout evaluation during design transition. Contact the design team to assess footprint compatibility for your specific application.

Q: What is the significance of the MSL 3 (168 Hours) rating? A: MSL 3 indicates that both components require moisture control during storage and handling. Components must be stored in dry conditions and have a maximum floor life of 168 hours after moisture barrier bag opening. Identical MSL ratings ensure equivalent handling protocols between the main part and substitute.

Q: Does the substitute part maintain the same export control classification? A: Yes. Both SM668PXB-ACS and SM662PXC carry ECCN code 3A991B1A, confirming identical export control treatment. No changes to export documentation or supply chain procedures are required when transitioning to the substitute part.

Q: Is the SM662PXC suitable for industrial temperature applications? A: The SM662PXC operates across -25°C to 85°C, covering industrial temperature ranges. Verify that your specific application requirements fall within this operating window before finalizing component selection.