AT45DB321E-CCUF-T Equivalent & Substitute Parts

Part Overview

The AT45DB321E-CCUF-T is a 32Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, designed for SPI interface applications operating at 85 MHz. This component features a 9-UBGA (6x6) package configuration and supports supply voltages from 2.3V to 3.6V across an operating temperature range of -40°C to 85°C.

The AT45DB321E-CCUF-T is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this memory IC.

Substiute Parts

AT45DB321E-CCUF-T

Renesas Electronics CorporationIn Stock: 1077AT45DB321E-CCUF-T Datasheet

Current PartRFQ

AT45DB321E-MHF-T

Renesas Electronics CorporationIn Stock: 24208AT45DB321E-MHF-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT45DB321E-CCUF-T are identified based on the following critical parameters that determine functional and electrical compatibility:

• Memory capacity: 32Mbit
• Memory format and technology: FLASH
• Interface protocol: SPI
• Operating frequency: 85 MHz
• Memory organization: 528 Bytes x 8192 pages
• Write cycle timing: 8µs (word), 4ms (page)
• Supply voltage range: 2.3V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Base product number: AT45DB321

The AT45DB321E-MHF-T meets all electrical and functional requirements for substitution. While the package configuration differs (8-UDFN versus 9-UBGA), both are surface mount packages with compatible pinout arrangements for this memory IC series.

Parameter Comparison

Engineering Selection Recommendations

The AT45DB321E-MHF-T is the primary substitute for the AT45DB321E-CCUF-T based on the following factors:

• All electrical parameters, memory specifications, and interface characteristics are identical
• The substitute part maintains active product status, ensuring ongoing availability and supply chain support
• The substitute part is ROHS3 compliant, meeting current regulatory requirements
• Improved moisture sensitivity level (MSL 1 versus MSL 3) provides enhanced handling flexibility and reduced storage constraints
• Both parts share the same base product number (AT45DB321) and are manufactured by the same supplier

Package transition from 9-UBGA to 8-UDFN requires PCB layout modification and design validation to confirm pinout compatibility and thermal characteristics for the specific application.

Frequently Asked Questions (FAQ)

Q: What makes AT45DB321E-MHF-T a valid substitute for AT45DB321E-CCUF-T?

A: Both parts are manufactured by Renesas Electronics Corporation and share identical electrical specifications: 32Mbit FLASH memory, SPI interface, 85 MHz clock frequency, 528 Bytes x 8192 page organization, 8µs/4ms write cycle times, and 2.3V to 3.6V supply voltage range. Operating temperature ranges are identical at -40°C to 85°C.

Q: Are there package compatibility considerations?

A: Yes. The main part uses a 9-UBGA (6x6) package, while the substitute uses an 8-UDFN (5x6) package. Both are surface mount configurations, but PCB layout and footprint modifications are required. Pinout compatibility must be verified against the specific application schematic.

Q: What is the difference in moisture sensitivity between these parts?

A: The AT45DB321E-CCUF-T has MSL 3 (168 hours), requiring controlled storage and handling conditions. The AT45DB321E-MHF-T has MSL 1 (unlimited), eliminating moisture sensitivity constraints and simplifying inventory management and assembly processes.

Q: Why is the main part listed as obsolete?

A: The AT45DB321E-CCUF-T is classified as obsolete by the manufacturer. The AT45DB321E-MHF-T remains in active production, ensuring long-term availability and support for new designs and production continuity.

Q: Are regulatory certifications equivalent?

A: Both parts are REACH unaffected. The substitute part is ROHS3 compliant, meeting current environmental regulations. Compliance verification for the main part was not specified in available documentation.