AT45DB041D-MU-SL383 Equivalent & Substitute Parts

Part Overview

The AT45DB041D-MU-SL383 is a 4Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation, packaged in an 8-VDFN (6x5) surface mount configuration. This device operates at 66 MHz with a supply voltage range of 2.7V to 3.6V and is rated for industrial temperature ranges (-40°C to 85°C). The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and inventory management.

Key Parameters

Parameter	Value
Memory Size	4Mbit
Memory Format	FLASH
Memory Interface	SPI
Clock Frequency	66 MHz
Memory Organization	264 Bytes x 2048 pages
Voltage Supply Range	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	8-VDFN Exposed Pad (6x5)
Write Cycle Time (Page)	4ms
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the AT45DB041D-MU-SL383 is determined by the following critical parameters:

Memory Capacity: 4Mbit (non-negotiable)
Memory Format & Technology: FLASH (non-negotiable)
Interface Protocol: SPI (non-negotiable)
Memory Organization: 264 Bytes x 2048 pages (non-negotiable)
Operating Temperature Range: -40°C ~ 85°C (non-negotiable)
Base Product Number: AT45DB041 (same device family)

The substitute part AT45DB041E-MHN-T shares the same base product number, memory capacity, format, interface, and memory organization. While it operates at a higher clock frequency (85 MHz versus 66 MHz) and features an improved voltage supply range (1.65V ~ 3.6V), these enhancements are backward-compatible with the original specification. The package type differs (8-UDFN versus 8-VDFN), requiring PCB layout verification.

Parameter Comparison

Parameter	AT45DB041D-MU-SL383 (Main)	AT45DB041E-MHN-T (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Size	4Mbit	4Mbit
Memory Format	FLASH	FLASH
Memory Interface	SPI	SPI
Memory Organization	264 Bytes x 2048 pages	264 Bytes x 2048 pages
Clock Frequency	66 MHz	85 MHz
Voltage Supply Range	2.7V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Write Cycle Time (Page)	4ms	3ms
Package Type	8-VDFN Exposed Pad (6x5)	8-UDFN Exposed Pad (5x6)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
Moisture Sensitivity Level	3 (168 Hours)	1 (Unlimited)
RoHS Status	Not specified	ROHS3 Compliant
REACH Status	Not specified	REACH Unaffected

Engineering Selection Recommendations

The AT45DB041E-MHN-T is the designated substitute for the obsolete AT45DB041D-MU-SL383. Selection of this alternative is supported by:

Product Status: The substitute is active and currently manufactured, ensuring long-term availability and supply chain continuity.
Regulatory Compliance: The substitute meets ROHS3 and REACH requirements, aligning with current environmental and regulatory standards.
Functional Compatibility: Both devices share identical memory capacity, organization, interface protocol, and operating temperature specifications.
Performance Enhancement: The substitute provides improved specifications including higher clock frequency (85 MHz), extended lower voltage operation (1.65V minimum), and faster page write cycle time (3ms).

Critical Consideration: The package type differs between the main part (8-VDFN, 6x5mm) and the substitute (8-UDFN, 5x6mm). PCB footprint and layout must be verified for compatibility before implementation.

Frequently Asked Questions (FAQ)

Q: Can AT45DB041E-MHN-T directly replace AT45DB041D-MU-SL383 without design changes?

A: Functional replacement is possible due to identical memory specifications and SPI interface. However, the package footprint differs (8-VDFN versus 8-UDFN), requiring PCB layout modification and re-qualification.

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

A: The substitute operates at higher clock frequency (85 MHz vs. 66 MHz), supports lower minimum supply voltage (1.65V vs. 2.7V), has faster page write time (3ms vs. 4ms), and features improved moisture sensitivity rating (MSL 1 vs. MSL 3). Both maintain identical 4Mbit capacity and SPI interface.

Q: Is the AT45DB041E-MHN-T backward-compatible with existing firmware?

A: Yes. The SPI interface, memory organization, and command set are identical. The higher performance specifications of the substitute are backward-compatible with systems designed for the original part.

Q: Why is the package type different?

A: The 8-UDFN package represents a newer design iteration from Renesas Electronics Corporation. Both packages provide equivalent electrical functionality but differ in physical dimensions and PCB footprint requirements.

Q: What is the significance of the improved voltage supply range?

A: The substitute's extended lower voltage limit (1.65V) provides greater flexibility for low-power applications and battery-operated systems compared to the original 2.7V minimum.

Q: Are there any supply chain advantages to using the substitute?

A: Yes. The AT45DB041E-MHN-T is an active product with significantly higher inventory availability (33,975 units in stock versus 783 units for the obsolete part), ensuring reliable procurement and shorter lead times.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message