AT25SF321B-SHB-T Equivalent & Substitute Parts

Part Overview

The AT25SF321B-SHB-T is a 32Mbit NOR Flash memory IC manufactured by Renesas Electronics Corporation, designed for SPI and Quad I/O applications. This Surface Mount device operates at 108 MHz and is housed in an 8-SOIC package. The part is currently Active in product status with verified programmability and ROHS3 compliance. Substitute parts are identified when equivalent memory capacity, interface protocol, voltage specifications, and package form factor requirements necessitate alternative sourcing due to inventory constraints or supply chain considerations.

Substiute Parts

AT25SF321B-SHB-T

Renesas Electronics CorporationIn Stock: 50375AT25SF321B-SHB-T Datasheet

Current PartRFQ

W25Q32JVSSIQ

Winbond ElectronicsIn Stock: 194474W25Q32JVSSIQ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT25SF321B-SHB-T is determined by the following critical parameters:

• Memory Size: 32Mbit capacity requirement
• Memory Organization: 4M x 8 configuration
• Memory Interface: SPI - Quad I/O protocol support
• Package / Case: 8-SOIC form factor with 5.30mm width
• Voltage - Supply: 2.7V ~ 3.6V operating range
• Operating Temperature: -40°C ~ 85°C range
• Mounting Type: Surface Mount technology
• Compliance: ROHS3 and REACH Unaffected status

The W25Q32JVSSIQ meets all substitution criteria within these allowed parameters. Variations in clock frequency (108 MHz vs. 133 MHz) and write cycle timing do not preclude substitution when the core functional and physical requirements are satisfied.

Parameter Comparison

Engineering Selection Recommendations

Both the AT25SF321B-SHB-T and W25Q32JVSSIQ are Active products with verified programmability and full compliance certifications (ROHS3 and REACH Unaffected). Selection between these parts is based on availability and supply chain requirements rather than functional capability differences. The W25Q32JVSSIQ operates at a higher clock frequency (133 MHz vs. 108 MHz), which represents a performance enhancement without introducing incompatibility. Both devices maintain identical voltage supply ranges, operating temperature specifications, and physical package dimensions, ensuring direct substitution in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the W25Q32JVSSIQ directly replace the AT25SF321B-SHB-T in existing designs?

A: Yes. Both devices share identical memory capacity (32Mbit), organization (4M x 8), interface protocol (SPI - Quad I/O), package form factor (8-SOIC), voltage specifications (2.7V ~ 3.6V), and operating temperature range (-40°C ~ 85°C). The higher clock frequency of the W25Q32JVSSIQ does not create incompatibility.

Q: Are there differences in write cycle timing between these parts?

A: The AT25SF321B-SHB-T specifies write cycle times of 50µs (word) and 3ms (page). The W25Q32JVSSIQ specifies 3ms (page). These timing differences do not affect substitution eligibility when the application timing requirements are met by either specification.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the AT25SF321B-SHB-T and W25Q32JVSSIQ are ROHS3 Compliant and REACH Unaffected, with identical ECCN and HTSUS classifications.

Q: What is the difference in packaging between these parts?

A: The AT25SF321B-SHB-T is supplied in Tape & Reel (TR) format, while the W25Q32JVSSIQ is supplied in Tube format. Both use the same 8-SOIC package case with 5.30mm width. Packaging format does not affect electrical or mechanical compatibility.

Q: Are both parts currently in production?

A: Yes. Both the AT25SF321B-SHB-T and W25Q32JVSSIQ maintain Active product status with verified programmability and substantial inventory availability.