AT25DF041A-MH-Y Equivalent & Substitute Parts

Part Overview

The AT25DF041A-MH-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 70 MHz with a supply voltage range of 2.7V to 3.6V and is rated for -40°C to 85°C operating temperature. The product is currently obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Memory Size	4Mbit
Memory Organization	512K x 8
Memory Interface	SPI
Clock Frequency	70 MHz
Voltage Supply Range	2.7V ~ 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
Moisture Sensitivity Level	MSL 3 (168 Hours)

Substitute Part Grouping Explanation

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

Memory capacity (4Mbit) and organization (512K x 8)
Interface protocol (SPI)
Package type and form factor (8-UDFN Exposed Pad, 5x6)
Operating temperature range (-40°C ~ 85°C minimum)
Supply voltage compatibility (minimum 2.7V support)

The substitute parts listed maintain identical memory capacity, organization, interface, and package specifications. Variations in clock frequency (70 MHz to 104 MHz), write cycle times, and supply voltage ranges (extended to 1.65V) represent functional improvements while preserving backward compatibility. All substitutes are manufactured by Renesas Electronics Corporation and share the same base product family (AT25DF041 or AT25XE041 series).

Parameter Comparison

Parameter	AT25DF041A-MH-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	70 MHz	104 MHz	85 MHz	85 MHz	85 MHz
Voltage Supply Range	2.7V ~ 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	MSL 3 (168 Hours)	MSL 3 (168 Hours)	MSL 1 (Unlimited)	MSL 1 (Unlimited)	MSL 1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts are active products from Renesas Electronics Corporation and maintain full compatibility with the AT25DF041A-MH-Y in terms of memory capacity, organization, interface protocol, and package form factor.

AT25DF041B-MHN-Y provides the closest functional match with increased clock frequency (104 MHz) and improved page write performance (2.5ms vs 5ms). This part maintains the same operating temperature range and offers ROHS3 compliance with extended supply voltage support (1.65V minimum).

AT25XE041B-MHN-T and AT25XE041B-MHN-Y offer superior moisture handling characteristics (MSL 1 vs MSL 3) with unlimited shelf life. Both operate at 85 MHz with extended supply voltage range and ROHS3 compliance. The primary difference is packaging format: tape and reel versus tray.

AT25XE041B-MHNHR-T extends the operating temperature range to -40°C to 125°C, providing thermal margin for high-temperature applications while maintaining all other performance characteristics of the AT25XE041B series. This part is supplied in tape and reel format with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can AT25DF041B-MHN-Y directly replace AT25DF041A-MH-Y?

A: Yes. Both parts share identical memory capacity (4Mbit), organization (512K x 8), SPI interface, 8-UDFN package, and operating temperature range (-40°C to 85°C). The AT25DF041B-MHN-Y operates at higher clock frequency (104 MHz vs 70 MHz) and faster page write time (2.5ms vs 5ms), representing functional improvements with full backward compatibility.

Q: What is the difference between AT25XE041B and AT25DF041B series?

A: Both series maintain identical memory specifications and package form factor. The AT25XE041B series offers superior moisture sensitivity rating (MSL 1 with unlimited shelf life vs MSL 3 with 168-hour limit) and operates at 85 MHz. The AT25DF041B operates at 104 MHz. Both support extended supply voltage range (1.65V minimum).

Q: Does packaging format (tray vs tape and reel) affect electrical compatibility?

A: No. Packaging format (tray, tape and reel) affects only handling, storage, and assembly processes. Electrical and functional specifications remain identical between AT25XE041B-MHN-Y (tray) and AT25XE041B-MHN-T (tape and reel).

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

A: Yes. This part extends the maximum operating temperature to 125°C compared to 85°C for other substitutes. All other electrical and functional parameters remain consistent with the AT25XE041B series.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts (AT25DF041B-MHN-Y, AT25XE041B-MHN-T, AT25XE041B-MHN-Y, AT25XE041B-MHNHR-T) are ROHS3 compliant. The original AT25DF041A-MH-Y RoHS status is not specified.

Q: What supply voltage range must be supported for substitution?

A: The original AT25DF041A-MH-Y requires 2.7V to 3.6V. All substitute parts support this range with extended minimum voltage (1.65V), ensuring compatibility with existing power supply designs.

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