AT25DF041A-SHF-B Equivalent & Substitute Parts

Part Overview

The AT25DF041A-SHF-B is a 4Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation in an 8-SOIC surface mount package. This device operates at 50 MHz and is designed for non-volatile data storage applications requiring SPI interface connectivity.

The AT25DF041A-SHF-B is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this memory IC.

Substiute Parts

AT25DF041A-SHF-B

Renesas Electronics CorporationIn Stock: 982AT25DF041A-SHF-B Datasheet

Current PartRFQ

W25Q40CLSSIG

Winbond ElectronicsIn Stock: 982W25Q40CLSSIG Datasheet

MFR RecommendedRFQ

W25X40CLSSIG

Winbond ElectronicsIn Stock: 44499W25X40CLSSIG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT25DF041A-SHF-B are qualified based on the following core parameters:

• Memory Capacity: 4Mbit (512K x 8 organization)
• Package Compatibility: 8-SOIC surface mount package with identical physical dimensions
• Supply Voltage Range: 2.3V ~ 3.6V compatibility
• Operating Temperature Range: -40°C ~ 85°C coverage
• Interface Protocol: SPI-compatible communication

The substitute parts listed below meet these electrical and mechanical requirements. The W25Q40CLSSIG and W25X40CLSSIG from Winbond Electronics satisfy all core substitution criteria while maintaining pinout and functional compatibility with the AT25DF041A-SHF-B.

Parameter Comparison

Engineering Selection Recommendations

W25X40CLSSIG is the primary substitute for the AT25DF041A-SHF-B. This part maintains full electrical and mechanical compatibility while offering active product status and ROHS3 compliance. The W25X40CLSSIG operates at 104 MHz, providing performance headroom beyond the original 50 MHz specification. Programmability has been verified for this device.

W25Q40CLSSIG is an alternative substitute that provides Quad I/O interface capability in addition to standard SPI operation. This part supports higher clock frequencies (104 MHz) and maintains identical package and voltage specifications. Product status is active with ROHS3 compliance. Note that programmability verification status differs from W25X40CLSSIG.

Both substitute parts are manufactured by Winbond Electronics and carry identical ECCN and HTSUS classifications as the original AT25DF041A-SHF-B, facilitating regulatory and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can W25X40CLSSIG and W25Q40CLSSIG be used interchangeably with AT25DF041A-SHF-B?

A: Both parts meet the core electrical and mechanical substitution criteria. W25X40CLSSIG provides direct SPI interface compatibility. W25Q40CLSSIG adds Quad I/O capability while maintaining SPI backward compatibility. Selection depends on application-specific interface requirements.

Q: What are the key differences between the substitute parts?

A: W25X40CLSSIG operates exclusively in SPI mode at 104 MHz. W25Q40CLSSIG supports both SPI and Quad I/O modes at 104 MHz. Both maintain identical 4Mbit capacity, 8-SOIC packaging, and voltage specifications.

Q: Are there package compatibility concerns?

A: No. Both substitute parts use the identical 8-SOIC (0.209", 5.30mm Width) package. Direct PCB footprint compatibility is maintained without layout modifications.

Q: What is the impact of higher clock frequency in substitute parts?

A: The substitute parts operate at 104 MHz versus the original 50 MHz. This provides performance margin and does not create backward compatibility issues in applications designed for 50 MHz operation.

Q: Are compliance certifications maintained?

A: Yes. Both substitute parts are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. ECCN and HTSUS classifications remain consistent with the original part.