AT25DF041A-MHF-Y Equivalent & Substitute Parts

Part Overview

The AT25DF041A-MHF-Y is a 4Mbit SPI FLASH memory IC manufactured by Renesas Electronics Corporation in an 8-UDFN (5x6) surface mount package. This part operates at 50 MHz with a supply voltage range of 2.3V to 3.6V and is rated for -40°C to 85°C operating temperature. The AT25DF041A-MHF-Y is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Key Parameters

Parameter	Value
Memory Size	4Mbit
Memory Organization	512K x 8
Memory Interface	SPI
Clock Frequency	50 MHz
Voltage Supply Range	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	8-UDFN Exposed Pad (5x6)
Mounting Type	Surface Mount
Write Cycle Time (Word/Page)	7µs / 5ms
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the AT25DF041A-MHF-Y is determined by the following critical parameters:

Memory Capacity & Organization: All substitute parts must maintain 4Mbit capacity with 512K x 8 organization
Interface Protocol: SPI interface is mandatory for functional compatibility
Package & Pinout: 8-UDFN Exposed Pad (5x6) package ensures mechanical and electrical compatibility
Voltage Compatibility: Substitute parts must operate within or encompass the original supply voltage range (2.3V ~ 3.6V)
Operating Temperature Range: Substitute parts must support the required temperature range (-40°C ~ 85°C minimum)

The substitute parts listed below meet these core substitution criteria. Enhanced specifications such as higher clock frequency, lower write cycle times, and extended temperature ranges represent functional improvements that do not compromise backward compatibility.

Parameter Comparison

Parameter	AT25DF041A-MHF-Y	AT25DF041B-MHN-Y	AT25XE041B-MHN-T	AT25XE041B-MHN-Y	AT25XE041B-MHNHR-T
Memory Size	4Mbit	4Mbit	4Mbit	4Mbit	4Mbit
Memory Organization	512K x 8	512K x 8	512K x 8	512K x 8	512K x 8
Memory Interface	SPI	SPI	SPI	SPI	SPI
Clock Frequency	50 MHz	104 MHz	85 MHz	85 MHz	85 MHz
Voltage Supply Range	2.3V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Package Type	8-UDFN Exposed Pad	8-UDFN Exposed Pad	8-UDFN Exposed Pad	8-UDFN Exposed Pad	8-UDFN Exposed Pad
Write Cycle Time (Word/Page)	7µs / 5ms	8µs / 2.5ms	8µs / 2.75ms	8µs / 2.75ms	8µs / 2.75ms
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

AT25DF041B-MHN-Y is the manufacturer-recommended direct replacement. This part is active in production, ROHS3 compliant, and offers doubled clock frequency (104 MHz) with improved page write cycle time (2.5ms). The expanded voltage range (1.65V ~ 3.6V) provides additional design flexibility. MSL rating of 3 requires standard moisture control during storage and assembly.

AT25XE041B-MHN-T and AT25XE041B-MHN-Y provide equivalent functionality with 85 MHz clock frequency and improved write performance. Both maintain MSL 1 rating (unlimited moisture sensitivity) and ROHS3 compliance. The primary difference is packaging: MHN-T is supplied in Tape & Reel format, while MHN-Y is supplied in Tray format.

AT25XE041B-MHNHR-T is the highest-specification option, supporting extended operating temperature range (-40°C ~ 125°C) while maintaining all other electrical parameters. This variant is supplied in Tape & Reel format and is suitable for applications requiring enhanced thermal performance.

Frequently Asked Questions (FAQ)

Q: Can AT25DF041B-MHN-Y directly replace AT25DF041A-MHF-Y without circuit modifications?

A: Yes. Both parts share identical memory capacity (4Mbit), organization (512K x 8), SPI interface, and 8-UDFN package. The AT25DF041B-MHN-Y operates within the original voltage range and temperature specifications. Enhanced performance parameters (higher clock frequency, faster write cycles) do not require design changes.

Q: What is the difference between AT25XE041B-MHN-Y and AT25XE041B-MHN-T?

A: Both parts are electrically identical with 85 MHz clock frequency and identical electrical specifications. The difference is packaging format: MHN-Y is supplied in Tray packaging, while MHN-T is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and volume handling.

Q: Why does AT25DF041B-MHN-Y have MSL 3 while other substitutes have MSL 1?

A: MSL (Moisture Sensitivity Level) rating reflects moisture absorption characteristics during storage. MSL 3 requires storage at controlled humidity (≤60% RH) and has a 168-hour floor life after bag opening. MSL 1 parts have unlimited floor life. For most applications, MSL 3 is acceptable with standard moisture control practices.

Q: Is AT25XE041B-MHNHR-T suitable for high-temperature applications?

A: Yes. AT25XE041B-MHNHR-T supports operating temperature range of -40°C to 125°C, compared to -40°C to 85°C for other variants. This extended range makes it suitable for automotive, industrial, and high-reliability applications requiring elevated temperature operation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (AT25DF041B-MHN-Y, AT25XE041B-MHN-T, AT25XE041B-MHN-Y, and AT25XE041B-MHNHR-T) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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