SM671PXA-ADSS Equivalent & Substitute Parts

Part Overview

The SM671PXA-ADSS is a FLASH NAND (SLC) memory integrated circuit manufactured by Silicon Motion, Inc., with a capacity of 40Gbit organized as 5G x 8. This component operates via the UFS3.1 interface and is packaged in a 153-TFBGA form factor measuring 11.5x13mm. The device is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain identical electrical and mechanical specifications to ensure direct compatibility in existing applications.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile FLASH
Technology	FLASH - NAND (SLC)
Memory Size	40Gbit
Memory Organization	5G x 8
Memory Interface	UFS3.1
Package / Case	153-TFBGA
Supplier Device Package	153-BGA (11.5x13)
Mounting Type	Surface Mount
Operating Temperature	-25°C ~ 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Series	Ferri-UFS™
Base Product Number	SM671

Substitute Part Grouping Explanation

Substitution of the SM671PXA-ADSS is determined by strict equivalence across the following critical parameters:

Memory Specifications: The substitute part must maintain identical memory capacity (40Gbit), memory organization (5G x 8), memory type (Non-Volatile FLASH), and technology (FLASH - NAND SLC).

Interface Compatibility: The UFS3.1 interface specification is mandatory for functional compatibility with host systems designed for the original component.

Physical Package: The 153-TFBGA package with dimensions 11.5x13mm is required for PCB layout and assembly compatibility. Surface mount mounting type must be preserved.

Environmental and Compliance Parameters: Operating temperature range (-25°C ~ 85°C), RoHS3 compliance, and MSL rating (3, 168 Hours) must remain consistent.

Manufacturer Consistency: All substitute parts are sourced from Silicon Motion, Inc., maintaining design and quality consistency within the Ferri-UFS™ series.

The SM671PXA-AFSS meets all substitution criteria and is classified as an active product, providing a direct replacement path for the obsolete SM671PXA-ADSS.

Parameter Comparison

Parameter	SM671PXA-ADSS (Main Part)	SM671PXA-AFSS (Substitute)
Manufacturer	Silicon Motion, Inc.	Silicon Motion, Inc.
Memory Type	Non-Volatile	Non-Volatile
Memory Format	FLASH	FLASH
Technology	FLASH - NAND (SLC)	FLASH - NAND (SLC)
Memory Size	40Gbit	40Gbit
Memory Organization	5G x 8	5G x 8
Memory Interface	UFS3.1	UFS3.1
Package / Case	153-TFBGA	153-TFBGA
Supplier Device Package	153-BGA (11.5x13)	153-BGA (11.5x13)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
Series	Ferri-UFS™	Ferri-UFS™
Base Product Number	SM671	SM671
Product Status	Obsolete	Active

Engineering Selection Recommendations

The SM671PXA-AFSS is the direct equivalent substitute for the obsolete SM671PXA-ADSS. Both components share identical electrical and mechanical specifications across all critical parameters including memory capacity, interface protocol, package geometry, and environmental operating conditions.

The primary distinction between the two parts is product status: SM671PXA-ADSS is classified as obsolete, while SM671PXA-AFSS maintains active product status. This status difference reflects manufacturing availability and long-term supply viability. Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring equivalent handling and storage requirements.

For applications currently utilizing SM671PXA-ADSS, direct substitution with SM671PXA-AFSS is supported without design modification or PCB layout changes. The active status of SM671PXA-AFSS provides improved supply chain continuity and manufacturing support compared to the obsolete SM671PXA-ADSS.

Frequently Asked Questions (FAQ)

Q: Can SM671PXA-AFSS be used as a direct replacement for SM671PXA-ADSS?

A: Yes. Both components are electrically and mechanically identical across all specified parameters. The SM671PXA-AFSS provides direct substitution without design changes or board modifications.

Q: What is the primary difference between these two part numbers?

A: The SM671PXA-ADSS is classified as obsolete, while the SM671PXA-AFSS maintains active product status. All electrical and mechanical specifications remain identical.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 153-TFBGA package with dimensions of 11.5x13mm. Surface mount assembly compatibility is maintained.

Q: Do both parts operate across the same temperature range?

A: Yes. Both components operate from -25°C to 85°C, ensuring identical thermal performance characteristics.

Q: Are there any compliance differences between the two parts?

A: No. Both parts maintain ROHS3 compliance and identical MSL ratings of 3 (168 Hours).

Q: What memory interface does each part support?

A: Both SM671PXA-ADSS and SM671PXA-AFSS support the UFS3.1 interface protocol with identical electrical specifications.

Q: Is the memory capacity the same for both parts?

A: Yes. Both components provide 40Gbit capacity organized as 5G x 8, utilizing FLASH - NAND (SLC) technology.

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