AT25DQ321-SH-T Equivalent & Substitute Parts

Part Overview

The AT25DQ321-SH-T is a 32Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation, designed for non-volatile data storage applications requiring 100 MHz operation. This component is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part is packaged in 8-SOIC form factor with unlimited moisture sensitivity rating (MSL 1).

Substiute Parts

AT25DQ321-SH-T

Renesas Electronics CorporationIn Stock: 1070AT25DQ321-SH-T Datasheet

Current PartRFQ

AT25DF321A-SH-T

Renesas Electronics CorporationIn Stock: 20282AT25DF321A-SH-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT25DQ321-SH-T is determined by strict equivalence across the following critical parameters:

• Memory capacity: 32Mbit
• Interface protocol: SPI
• Operating frequency: 100 MHz
• Memory organization: 256 Bytes x 16384 pages
• Write performance: 7µs word cycle, 3ms page cycle
• Supply voltage range: 2.7V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Package form factor: 8-SOIC with 5.30mm width
• Mounting technology: Surface Mount

The AT25DF321A-SH-T meets all specified electrical and mechanical parameters and is identified as the manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The AT25DF321A-SH-T is the direct functional equivalent for AT25DQ321-SH-T replacement. Both components share identical electrical specifications, memory architecture, and physical packaging. The substitute part carries ROHS3 compliance and REACH unaffected status, providing regulatory alignment for current manufacturing standards. The AT25DF321A-SH-T is verified as programmable and maintains full pin and protocol compatibility with the original part number.

Frequently Asked Questions (FAQ)

Q: Can AT25DF321A-SH-T be used as a direct replacement for AT25DQ321-SH-T?

A: Yes. Both parts are 32Mbit SPI FLASH memory devices with identical memory organization, clock frequency, write cycle times, supply voltage, operating temperature range, and 8-SOIC packaging. No circuit modifications are required.

Q: Are there differences in compliance certifications between these parts?

A: The AT25DF321A-SH-T carries ROHS3 compliance and REACH unaffected status. The AT25DQ321-SH-T compliance status is not specified in available documentation. For applications requiring regulatory compliance documentation, the AT25DF321A-SH-T provides explicit certification.

Q: What is the significance of the product status difference?

A: AT25DQ321-SH-T is classified as Obsolete, indicating end-of-life status with no further manufacturing. AT25DF321A-SH-T is Discontinued at DiGi Electronics but represents the current equivalent offering from the manufacturer. This distinction reflects market availability rather than functional capability.

Q: Are the package dimensions identical?

A: Yes. Both parts use 8-SOIC packaging with 0.209" (5.30mm) width. PCB footprints and assembly processes are interchangeable.

Q: Is the AT25DF321A-SH-T programmable?

A: Yes. The AT25DF321A-SH-T is verified as programmable. The AT25DQ321-SH-T programmability status is not verified in available documentation.