AT26F004-MU Equivalent & Substitute Parts

Part Overview

The AT26F004-MU is a 4Mbit SPI FLASH memory IC manufactured by Renesas Electronics Corporation, designed for non-volatile data storage applications requiring serial peripheral interface communication. This component operates at 33 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, design updates, and production continuity.

Substiute Parts

AT26F004-MU

Renesas Electronics CorporationIn Stock: 1650AT26F004-MU Datasheet

Current PartRFQ

MX25L4006EZNI-12G

MacronixIn Stock: 115513MX25L4006EZNI-12G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT26F004-MU is determined by strict alignment of the following electrical and mechanical parameters:

• Memory Capacity: Must be 4Mbit to maintain firmware and data storage compatibility
• Memory Interface: Must be SPI to ensure protocol compatibility with existing host controllers
• Supply Voltage Range: Must encompass or match 2.7V ~ 3.6V to operate within system power specifications
• Operating Temperature Range: Must support -40°C ~ 85°C to function across the same environmental conditions
• Package Type: Must be 8-pin surface mount with compatible pinout and thermal characteristics
• Non-Volatile FLASH Technology: Must use FLASH memory architecture for data retention

The substitute part MX25L4006EZNI-12G meets all these criteria while offering enhanced performance characteristics (86 MHz clock frequency versus 33 MHz) and improved write cycle time (3ms page write versus 5ms), making it a direct functional equivalent with superior specifications.

Parameter Comparison

Engineering Selection Recommendations

The MX25L4006EZNI-12G is a direct functional substitute for the AT26F004-MU based on the following engineering criteria:

Electrical Compatibility: Both devices operate within identical supply voltage (2.7V ~ 3.6V) and temperature ranges (-40°C ~ 85°C), ensuring seamless integration into existing power distribution and thermal management systems.

Memory Interface Compatibility: Both components use SPI protocol with matching 4Mbit capacity and memory organization, allowing firmware and bootloader code to function without modification.

Package Compatibility: Both devices are housed in 8-pin surface mount packages with exposed pads and identical 6x5mm footprints, permitting direct PCB layout reuse without redesign.

Regulatory Compliance: The MX25L4006EZNI-12G carries ROHS3 compliance and REACH unaffected status, meeting modern environmental and regulatory requirements. Both components share identical ECCN (EAR99) and HTSUS classifications.

Product Availability: The substitute part is in active production status with substantial inventory availability (115,475 pieces), ensuring long-term supply chain stability compared to the obsolete AT26F004-MU.

Performance Enhancement: The substitute offers superior performance with 86 MHz clock frequency (2.6x faster than 33 MHz) and reduced page write cycle time (3ms versus 5ms), providing operational headroom for future system optimization.

Frequently Asked Questions (FAQ)

Q: Can the MX25L4006EZNI-12G directly replace the AT26F004-MU without firmware changes?

A: Yes. Both devices implement identical SPI protocol, 4Mbit capacity, and memory organization. Firmware and bootloader code require no modification. Pin compatibility and electrical specifications are matched.

Q: Are there package differences between the AT26F004-MU and MX25L4006EZNI-12G?

A: Both use 8-pin surface mount packages with 6x5mm footprints and exposed pads. The AT26F004-MU uses VDFN packaging while the MX25L4006EZNI-12G uses WSON packaging. Both are mechanically and electrically compatible for PCB mounting.

Q: What is the impact of the higher clock frequency (86 MHz vs 33 MHz) on system design?

A: The higher clock frequency of the MX25L4006EZNI-12G is backward compatible. Systems designed for 33 MHz operation will function correctly at the higher speed. No timing adjustments are required; the substitute operates within the same electrical and thermal parameters.

Q: Does the MX25L4006EZNI-12G meet current regulatory requirements?

A: Yes. The substitute is ROHS3 compliant and REACH unaffected, meeting current environmental regulations. Both components share identical ECCN (EAR99) classification for export control purposes.

Q: What is the significance of the reduced write cycle time (3ms vs 5ms)?

A: The faster page write cycle time of the MX25L4006EZNI-12G reduces overall programming duration, improving manufacturing throughput and field update speeds. This is a performance enhancement with no negative impact on system compatibility.

Q: Is the MX25L4006EZNI-12G available in production quantities?

A: Yes. The substitute part is in active production status with 115,475 pieces currently in stock, providing reliable long-term supply availability compared to the obsolete AT26F004-MU.