AT45DB641E-CCUN-T Equivalent & Substitute Parts

Part Overview

The AT45DB641E-CCUN-T is a 64Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation. This device operates at 85 MHz with a supply voltage range of 1.7V to 3.6V and is housed in a 9-UBGA (6x6) package. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility while accommodating packaging and availability constraints.

Substiute Parts

AT45DB641E-CCUN-T

Renesas Electronics CorporationIn Stock: 1164AT45DB641E-CCUN-T Datasheet

Current PartRFQ

AT45DB641E-MHN2B-T

Renesas Electronics CorporationIn Stock: 19516AT45DB641E-MHN2B-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT45DB641E-CCUN-T is determined by strict equivalence across the following electrical and mechanical parameters:

• Memory capacity: 64Mbit
• Interface protocol: SPI
• Operating frequency: 85 MHz
• Supply voltage range: 1.7V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Write performance: 8µs word cycle, 5ms page cycle
• Memory organization: 264 Bytes x 32K pages
• Compliance certifications: ROHS3, REACH Unaffected

The AT45DB641E-MHN2B-T meets all electrical specifications and maintains functional compatibility. The primary difference is the package format change from 9-UBGA (6x6) to 8-UDFN (5x6) with exposed pad, which requires PCB layout modification but does not affect electrical performance or protocol compatibility.

Parameter Comparison

Engineering Selection Recommendations

The AT45DB641E-MHN2B-T is the manufacturer-recommended substitute for the obsolete AT45DB641E-CCUN-T. Both devices are manufactured by Renesas Electronics Corporation and maintain identical electrical specifications, including memory capacity, SPI interface protocol, clock frequency, supply voltage range, and operating temperature range. Both parts are ROHS3 compliant and REACH unaffected.

The primary design consideration is the package transition from 9-UBGA to 8-UDFN format. This change requires PCB footprint redesign and layout modification but does not impact electrical functionality or firmware compatibility. The substitute part is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the AT45DB641E-MHN2B-T be used as a direct pin-for-pin replacement?

A: No. The AT45DB641E-MHN2B-T uses an 8-UDFN (5x6) package format compared to the 9-UBGA (6x6) package of the original part. PCB footprint and layout modifications are required. Pin assignments must be verified against the respective datasheets before implementation.

Q: Are the electrical specifications identical between the two parts?

A: Yes. Both parts operate at 85 MHz, support 1.7V to 3.6V supply voltage, maintain -40°C to 85°C operating temperature range, and provide identical write cycle times of 8µs (word) and 5ms (page).

Q: What is the difference in memory organization between these parts?

A: The AT45DB641E-CCUN-T uses 264 Bytes x 32K pages organization, while the AT45DB641E-MHN2B-T uses 256 Bytes x 32K pages. Both provide 64Mbit total capacity. Firmware and application code must account for this organizational difference.

Q: Why is the original part classified as obsolete?

A: The AT45DB641E-CCUN-T is no longer in active production. The AT45DB641E-MHN2B-T represents the current active alternative from the manufacturer, ensuring continued availability and support.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the AT45DB641E-CCUN-T and AT45DB641E-MHN2B-T are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What packaging format is the substitute part supplied in?

A: The AT45DB641E-MHN2B-T is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.