AT45DB041D-MU-SL954 Equivalent & Substitute Parts

Part Overview

The AT45DB041D-MU-SL954 is a 4Mbit FLASH memory IC with SPI interface operating at 66 MHz, manufactured by Renesas Electronics Corporation. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part is packaged in 8-VDFN (6x5) with exposed pad configuration, suitable for surface mount applications requiring non-volatile memory storage.

Substiute Parts

AT45DB041D-MU-SL954

Renesas Electronics CorporationIn Stock: 6058AT45DB041D-MU-SL954 Datasheet

Current PartRFQ

AT45DB041E-MHN2B-T

Renesas Electronics CorporationIn Stock: 1081AT45DB041E-MHN2B-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT45DB041D-MU-SL954 is determined by the following critical parameters:

• Memory Capacity: Must be 4Mbit to maintain data storage equivalence
• Memory Interface: Must be SPI to ensure protocol compatibility
• Memory Organization: Must be 256 Bytes x 2048 pages for address mapping compatibility
• Operating Temperature Range: Must support -40°C ~ 85°C minimum
• Supply Voltage Compatibility: Substitute must operate within overlapping voltage ranges or be compatible with existing power delivery circuits
• Package Footprint: Physical dimensions and pin configuration must be compatible with PCB layout

The AT45DB041E-MHN2B-T meets these core substitution criteria while offering enhanced specifications in clock frequency and write performance.

Parameter Comparison

Engineering Selection Recommendations

The AT45DB041E-MHN2B-T is the designated substitute for the obsolete AT45DB041D-MU-SL954. Selection of this substitute is supported by:

• Product Status: The substitute is active production, ensuring long-term availability and supply chain continuity
• Compliance: The substitute is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements
• Functional Equivalence: Both devices share identical memory capacity, organization, and SPI interface protocol
• Performance Enhancement: The substitute provides improved clock frequency (85 MHz vs 66 MHz) and faster page write cycle time (3ms vs 4ms)
• Moisture Sensitivity: The substitute has superior moisture handling characteristics (MSL 1 vs MSL 3)

Package Consideration: The substitute uses 8-UDFN (5x6) packaging versus the original 8-VDFN (6x5). PCB layout verification is required to confirm footprint compatibility, as package dimensions differ.

Voltage Range Consideration: The substitute operates at 1.65V ~ 3V versus the original 2.7V ~ 3.6V. Systems operating at voltages below 2.7V require the substitute; systems operating above 3V are compatible with both devices.

Frequently Asked Questions (FAQ)

Q: Can the AT45DB041E-MHN2B-T directly replace the AT45DB041D-MU-SL954 without firmware changes?

A: Yes, for SPI protocol and memory organization. Both devices implement identical SPI interface and 256 Bytes x 2048 pages organization. No firmware modification is required for basic read/write operations. However, the faster clock frequency and improved write cycle time of the substitute may require timing parameter verification in your specific application.

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

A: The main differences are product status (obsolete vs active), package type (8-VDFN vs 8-UDFN), clock frequency (66 MHz vs 85 MHz), and supply voltage range (2.7V~3.6V vs 1.65V~3V). The substitute offers better performance and regulatory compliance.

Q: Are the packages physically compatible?

A: No. The 8-VDFN (6x5) and 8-UDFN (5x6) packages have different physical dimensions. PCB footprint redesign is necessary for substitution. Verify pad layout, spacing, and thermal pad configuration before implementation.

Q: Which part should I use for new designs?

A: Use the AT45DB041E-MHN2B-T. It is in active production, meets current compliance standards, and provides superior performance characteristics.

Q: What is the significance of the MSL rating difference?

A: MSL 3 (168 Hours) indicates the original part requires controlled moisture exposure during storage and handling. MSL 1 (Unlimited) for the substitute means it has superior moisture resistance and requires no special moisture control measures, reducing handling complexity and cost.

Q: Can I use the substitute in a 2.5V system?

A: The original part operates at 2.7V minimum. The substitute operates at 1.65V minimum, making it suitable for 2.5V systems. Verify that your system's 3V maximum does not exceed the substitute's 3V upper limit.