AT45DB641E-CCUN2B-T Equivalent & Substitute Parts

Part Overview

The AT45DB641E-CCUN2B-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 identical electrical performance and memory organization while accommodating packaging and availability constraints.

Substiute Parts

AT45DB641E-CCUN2B-T

Renesas Electronics CorporationIn Stock: 1018AT45DB641E-CCUN2B-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-CCUN2B-T is determined by strict equivalence across the following critical parameters:

• Memory capacity: 64Mbit
• Memory interface protocol: SPI
• Clock frequency: 85 MHz
• Memory organization: 256 Bytes x 32K pages
• Write cycle timing: 8µs (word), 5ms (page)
• Supply voltage range: 1.7V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Compliance certifications: ROHS3, REACH Unaffected

The AT45DB641E-MHN2B-T qualifies as a direct functional substitute. Both devices share identical electrical specifications, memory architecture, and performance characteristics. The primary distinction is packaging format: the substitute uses 8-UDFN (5x6) with exposed pad versus the original 9-UBGA (6x6) configuration. This packaging change requires PCB layout modification but does not affect electrical compatibility or functional operation.

Parameter Comparison

Engineering Selection Recommendations

The AT45DB641E-MHN2B-T is the designated substitute for the obsolete AT45DB641E-CCUN2B-T. Selection of this alternative is supported by:

• Identical electrical specifications and memory performance characteristics
• Active product status ensuring long-term availability and supply chain continuity
• Equivalent compliance certifications (ROHS3, REACH Unaffected)
• Shared base product number (AT45DB641) confirming functional equivalence
• Higher inventory availability (19,437 units versus 965 units)

PCB redesign is required to accommodate the package transition from 9-UBGA to 8-UDFN format. Pin mapping and signal routing must be verified against device datasheets prior to layout implementation.

Frequently Asked Questions (FAQ)

Q: Are the AT45DB641E-CCUN2B-T and AT45DB641E-MHN2B-T electrically interchangeable?

A: Yes. Both devices provide identical SPI FLASH memory functionality with 64Mbit capacity, 85 MHz operation, and matching electrical specifications. Electrical interchangeability is confirmed across all performance parameters.

Q: What is the primary difference between these two parts?

A: The packaging format differs. The original uses 9-UBGA (6x6) while the substitute uses 8-UDFN Exposed Pad (5x6). This requires PCB layout modification but does not affect electrical operation or memory performance.

Q: Can I use the AT45DB641E-MHN2B-T as a direct drop-in replacement without PCB changes?

A: No. The different package types (9-UBGA versus 8-UDFN) have different footprints and pin configurations. PCB redesign is necessary to accommodate the substitute part.

Q: Are both parts RoHS compliant?

A: Yes. Both the AT45DB641E-CCUN2B-T and AT45DB641E-MHN2B-T are ROHS3 compliant and REACH unaffected.

Q: Why is the original part listed as obsolete?

A: The AT45DB641E-CCUN2B-T is classified as obsolete by the manufacturer. The AT45DB641E-MHN2B-T maintains active product status and is the recommended alternative for new designs and production continuity.

Q: Do the write cycle times match between these parts?

A: Yes. Both parts specify identical write cycle times: 8µs for word operations and 5ms for page operations.