AT45DB161E-CCUF-T Equivalent & Substitute Parts

Part Overview

The AT45DB161E-CCUF-T is a 16Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI interface operation at 85 MHz. This device is packaged in a 9-UBGA (6x6) form factor and is designed for non-volatile memory applications requiring serial peripheral interface communication. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

AT45DB161E-CCUF-T

Renesas Electronics CorporationIn Stock: 702AT45DB161E-CCUF-T Datasheet

Current PartRFQ

AT45DQ161-SSHF2B-T

Renesas Electronics CorporationIn Stock: 11675AT45DQ161-SSHF2B-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT45DB161E-CCUF-T is determined by the following critical parameters:

Core Functional Requirements:

• Memory capacity: 16Mbit
• Memory type: FLASH (non-volatile)
• Interface protocol: SPI-compatible
• Clock frequency: 85 MHz operation capability
• Supply voltage range: 2.3V ~ 3.6V compatibility
• Operating temperature range: -40°C ~ 85°C

Mechanical Compatibility Considerations:

• Package form factor and pinout compatibility
• Surface mount mounting type
• Physical dimensions and land pattern alignment

The AT45DQ161-SSHF2B-T qualifies as a manufacturer-recommended substitute based on matching core memory specifications (16Mbit capacity, FLASH technology, 85 MHz operation, identical voltage and temperature ranges) while offering enhanced interface capabilities through SPI - Quad I/O support. The substitute maintains functional compatibility with systems designed for the original part while providing additional performance options through quad I/O mode.

Parameter Comparison

Engineering Selection Recommendations

The AT45DQ161-SSHF2B-T is the manufacturer-recommended substitute for the obsolete AT45DB161E-CCUF-T. Selection of this substitute is supported by the following factors:

Product Status: The substitute part maintains active product status with Renesas Electronics Corporation, ensuring continued availability and manufacturing support compared to the obsolete main part.

Compliance & Certifications: The substitute achieves ROHS3 compliance and demonstrates improved moisture sensitivity characteristics (MSL 1 versus MSL 3), indicating enhanced reliability for storage and handling conditions.

Functional Compatibility: Both parts operate at identical voltage ranges (2.3V ~ 3.6V) and temperature specifications (-40°C ~ 85°C), with matching 85 MHz clock frequency and 16Mbit capacity. The substitute's SPI - Quad I/O interface remains backward-compatible with standard SPI operation.

Package Transition: The change from 9-UBGA to 8-SOIC packaging requires PCB redesign and layout modification. This transition is necessary due to the obsolescence of the original package form factor.

Frequently Asked Questions (FAQ)

Q: Can the AT45DQ161-SSHF2B-T directly replace the AT45DB161E-CCUF-T without firmware changes?

A: The substitute maintains SPI protocol compatibility at the functional level. However, the package change from 9-UBGA to 8-SOIC requires PCB redesign. Memory organization differs slightly (512 Bytes versus 528 Bytes per page), which may require firmware adjustment depending on application-specific memory addressing schemes.

Q: What is the significance of the memory organization difference (528 Bytes vs. 512 Bytes)?

A: The main part organizes memory as 528 Bytes x 4096 pages, while the substitute uses 512 Bytes x 4096 pages. This 16-byte difference per page affects total usable capacity and addressing calculations. Applications must account for this difference in memory mapping routines.

Q: Does the Quad I/O capability of the substitute provide backward compatibility?

A: Yes. The AT45DQ161-SSHF2B-T supports standard SPI operation mode, maintaining protocol compatibility with systems designed for the original SPI-only interface. Quad I/O functionality is optional and does not interfere with standard SPI communication.

Q: What are the implications of the page write cycle time difference (4ms vs. 6ms)?

A: The substitute requires 50% longer page write time (6ms versus 4ms). Applications with strict timing requirements must account for this extended write cycle. Overall system performance impact depends on write frequency and application architecture.

Q: Why is the moisture sensitivity level improved in the substitute?

A: The substitute achieves MSL 1 (unlimited shelf life) compared to MSL 3 (168 hours) for the main part. This improvement reduces handling and storage constraints, lowering risk of moisture-induced failures during manufacturing and logistics.

Q: Is the 8-SOIC package more or less suitable than 9-UBGA for high-density applications?

A: The 8-SOIC package provides larger pitch and simpler routing compared to 9-UBGA, potentially simplifying PCB layout. However, 9-UBGA offers smaller footprint for space-constrained designs. Package selection depends on specific application requirements and available PCB real estate.