AT45DB081D-MU-SL954 Equivalent & Substitute Parts

Part Overview

The AT45DB081D-MU-SL954 is an 8Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation, designed for non-volatile data storage applications. This device operates at 66 MHz with a supply voltage range of 2.7V to 3.6V and is housed in an 8-VDFN package with exposed pad. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

AT45DB081D-MU-SL954

Renesas Electronics CorporationIn Stock: 744AT45DB081D-MU-SL954 Datasheet

Current PartRFQ

AT45DB081E-MHN2B-T

Renesas Electronics CorporationIn Stock: 2052AT45DB081E-MHN2B-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT45DB081D-MU-SL954 is determined by the following critical parameters:

Core Compatibility Criteria:

• Memory capacity: 8Mbit (non-negotiable)
• Memory format: FLASH technology
• Interface protocol: SPI
• Memory organization: 256 Bytes x 4096 pages
• Operating temperature range: -40°C ~ 85°C
• Supply voltage compatibility: overlap within 2.7V ~ 3.6V range

Allowable Variations:

• Clock frequency: May exceed 66 MHz (backward compatible at lower speeds)
• Package type: Different VDFN/UDFN variants acceptable if pin-compatible
• Write cycle time: May be faster than 4ms specification
• Product status: Active products preferred over obsolete alternatives
• Moisture sensitivity: Lower MSL values indicate improved reliability

The AT45DB081E-MHN2B-T qualifies as a direct substitute based on identical memory capacity, organization, interface, and temperature range, with enhanced performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The AT45DB081E-MHN2B-T is the qualified substitute for the obsolete AT45DB081D-MU-SL954 based on the following factors:

Product Status: The substitute is classified as Active, ensuring continued availability and manufacturer support, whereas the main part is Obsolete.

Compliance & Certifications: The AT45DB081E-MHN2B-T carries ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic components in most jurisdictions.

Functional Equivalence: Both devices share identical memory capacity (8Mbit), organization (256 Bytes x 4096 pages), interface protocol (SPI), and operating temperature range (-40°C ~ 85°C), ensuring functional compatibility at the system level.

Enhanced Specifications: The substitute offers improved performance with 85 MHz clock frequency (versus 66 MHz), extended lower voltage operation (1.7V minimum versus 2.7V), and superior moisture resistance (MSL 1 versus MSL 3).

Package Consideration: The substitute uses 8-UDFN (5x6) packaging versus the main part's 8-VDFN (6x5). PCB layout and footprint verification is required prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the AT45DB081E-MHN2B-T directly replace the AT45DB081D-MU-SL954 in existing designs?

A: Functional replacement is possible due to identical memory capacity, organization, SPI interface, and operating temperature range. However, the package footprint differs (8-UDFN 5x6 versus 8-VDFN 6x5), requiring PCB layout modification and re-qualification of the physical implementation.

Q: What are the key differences between these two parts?

A: The primary differences are product status (Active versus Obsolete), clock frequency (85 MHz versus 66 MHz), minimum supply voltage (1.7V versus 2.7V), moisture sensitivity level (1 versus 3), and regulatory compliance certifications. Functionally, both devices provide identical 8Mbit SPI FLASH memory with the same page organization and write cycle time.

Q: Is the higher clock frequency of the substitute a concern for compatibility?

A: No. The AT45DB081E-MHN2B-T operates at 85 MHz, which is backward compatible with systems designed for 66 MHz operation. The device can be clocked at lower frequencies without functional degradation.

Q: What does the lower Moisture Sensitivity Level (MSL 1) of the substitute mean?

A: MSL 1 indicates unlimited shelf life under standard storage conditions, compared to MSL 3 which limits storage to 168 hours after moisture exposure. The substitute offers superior reliability and longer component shelf life.

Q: Are there any voltage supply considerations when switching to the substitute?

A: The substitute supports a wider voltage range (1.7V ~ 3.6V) compared to the main part (2.7V ~ 3.6V). This provides greater design flexibility for low-voltage applications. Existing designs operating within 2.7V ~ 3.6V will function without modification.

Q: What regulatory compliance advantages does the substitute offer?

A: The AT45DB081E-MHN2B-T is ROHS3 compliant and REACH Unaffected, meeting current environmental and hazardous substance regulations. The main part's compliance status is not specified, making the substitute the preferred choice for regulated markets.