W74M64FVSSIQ Equivalent & Substitute Parts

Part Overview

The W74M64FVSSIQ is a 64Mbit SPI/Quad I/O FLASH memory IC manufactured by Winbond Electronics in an 8-SOIC package. This non-volatile memory device operates at 80 MHz clock frequency with a supply voltage range of 2.7V to 3.6V and temperature range of -40°C to 85°C. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

W74M64FVSSIQ

Winbond ElectronicsIn Stock: 1044W74M64FVSSIQ Datasheet

Current PartRFQ

W74M64JVSSIQ

Winbond ElectronicsIn Stock: 1102W74M64JVSSIQ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the W74M64FVSSIQ is determined by strict equivalence across the following critical parameters:

• Memory capacity: 64Mbit
• Memory organization: 8M x 8
• Interface protocol: SPI - Quad I/O
• Package format: 8-SOIC with identical physical dimensions
• Supply voltage compatibility: 2.7V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Mounting technology: Surface Mount
• Compliance standards: ROHS3 Compliant

The W74M64JVSSIQ qualifies as a direct substitute based on full alignment with these parameters. Clock frequency variation (104 MHz vs. 80 MHz) represents an enhancement rather than a limitation, as the substitute operates at a higher speed while maintaining backward compatibility with the original specification.

Parameter Comparison

Engineering Selection Recommendations

The W74M64JVSSIQ is the appropriate substitute for the obsolete W74M64FVSSIQ. Both parts are manufactured by Winbond Electronics within the SpiFlash® series and maintain identical electrical and mechanical specifications across all critical parameters. The substitute part carries Active product status, ensuring continued availability and supply chain support.

Both parts maintain ROHS3 compliance and identical moisture sensitivity classification, satisfying regulatory and environmental requirements. The higher clock frequency of the substitute (104 MHz versus 80 MHz) provides operational margin without introducing compatibility concerns, as the substitute remains fully backward compatible with designs specified for the original part.

Frequently Asked Questions (FAQ)

Q: Can W74M64JVSSIQ directly replace W74M64FVSSIQ in existing designs?

A: Yes. Both parts share identical memory capacity (64Mbit), organization (8M x 8), interface protocol (SPI - Quad I/O), package format (8-SOIC), supply voltage range (2.7V ~ 3.6V), and operating temperature range (-40°C ~ 85°C). The higher clock frequency of the substitute does not create compatibility issues.

Q: What is the primary reason for substitution?

A: The W74M64FVSSIQ is classified as obsolete. The W74M64JVSSIQ is an active product from the same manufacturer and series, ensuring ongoing availability and supply continuity.

Q: Are there physical differences between these parts?

A: No. Both parts use the 8-SOIC package with identical dimensions (0.209" width, 5.30mm). PCB footprints and assembly processes remain unchanged.

Q: Do compliance certifications differ between the parts?

A: No. Both parts are ROHS3 compliant with identical moisture sensitivity level (MSL 1 - Unlimited), satisfying equivalent regulatory and environmental standards.

Q: Is the higher clock frequency of the substitute a concern?

A: No. The W74M64JVSSIQ operates at 104 MHz compared to the original 80 MHz specification. This represents enhanced performance while maintaining full backward compatibility with designs specified for 80 MHz operation.