AT25DF021-MHF-Y Equivalent & Substitute Parts

Part Overview

The AT25DF021-MHF-Y is a 2Mbit SPI FLASH memory IC manufactured by Renesas Electronics Corporation in an 8-UDFN (5x6) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates at 50 MHz with a supply voltage range of 2.3V to 3.6V and is suitable for non-volatile memory applications requiring SPI interface connectivity.

Key Parameters

Parameter	Value
Memory Size	2Mbit
Memory Organization	256K 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
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the AT25DF021-MHF-Y is determined by the following core parameters:

Memory capacity (2Mbit) and organization (256K x 8)
SPI interface protocol
Package type (8-UDFN Exposed Pad, 5x6 footprint)
Operating temperature range (-40°C ~ 85°C)
Surface mount mounting type

The substitute parts AT25DF021A-MHN-Y, AT25XE021A-MHN-T, and AT25XE021A-MHN-Y meet these core requirements. Variations in clock frequency (50 MHz to 104 MHz), supply voltage range (2.3V to 1.65V minimum), write cycle times, and product status do not prevent substitution when the application requirements are compatible with the substitute specifications.

Parameter Comparison

Parameter	AT25DF021-MHF-Y	AT25DF021A-MHN-Y	AT25XE021A-MHN-T	AT25XE021A-MHN-Y
Memory Size	2Mbit	2Mbit	2Mbit	2Mbit
Memory Organization	256K x 8	256K x 8	256K x 8	256K x 8
Memory Interface	SPI	SPI	SPI	SPI
Clock Frequency	50 MHz	104 MHz	70 MHz	70 MHz
Voltage Supply Range	2.3V ~ 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
Package / Case	8-UDFN Exposed Pad	8-UDFN Exposed Pad	8-UDFN Exposed Pad	8-UDFN Exposed Pad
Packaging Format	Not specified	Tray	Tape & Reel (TR)	Tray
Write Cycle Time (Word/Page)	7µs / 5ms	8µs / 2.5ms	8µs / 5ms	8µs / 5ms
Product Status	Obsolete	Active	Active	Active
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	Not specified	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three substitute parts (AT25DF021A-MHN-Y, AT25XE021A-MHN-T, AT25XE021A-MHN-Y) are active products with current manufacturing status, providing long-term availability compared to the obsolete AT25DF021-MHF-Y.

AT25DF021A-MHN-Y offers the highest clock frequency at 104 MHz with improved page write cycle time (2.5ms versus 5ms), while maintaining ROHS3 compliance and REACH unaffected status. This part is packaged in Tray format.

AT25XE021A-MHN-T and AT25XE021A-MHN-Y both operate at 70 MHz and feature improved moisture sensitivity level (MSL 1 with unlimited shelf life versus MSL 3 with 168-hour limitation). Both are ROHS3 compliant and REACH unaffected. AT25XE021A-MHN-T is supplied in Tape & Reel format, while AT25XE021A-MHN-Y is supplied in Tray format.

Selection between substitutes depends on application requirements for clock frequency, packaging format preference, and moisture sensitivity constraints.

Frequently Asked Questions (FAQ)

Q: Can AT25DF021A-MHN-Y directly replace AT25DF021-MHF-Y?

A: Yes. Both parts share identical memory capacity (2Mbit), organization (256K x 8), SPI interface, operating temperature range (-40°C ~ 85°C), and 8-UDFN package footprint. The substitute operates at higher clock frequency (104 MHz versus 50 MHz) and lower minimum supply voltage (1.65V versus 2.3V), making it compatible with designs using the original part.

Q: What are the differences between AT25XE021A-MHN-T and AT25XE021A-MHN-Y?

A: Both parts are electrically identical with 2Mbit capacity, 70 MHz clock frequency, and identical write cycle times. The primary difference is packaging format: AT25XE021A-MHN-T is supplied in Tape & Reel (TR) format, while AT25XE021A-MHN-Y is supplied in Tray format. Select based on assembly line requirements and volume needs.

Q: Why do substitute parts have lower minimum supply voltage (1.65V versus 2.3V)?

A: The substitute parts (AT25DF021A-MHN-Y and AT25XE021A series) represent newer silicon revisions with improved voltage tolerance. Designs operating at 2.3V or higher are fully compatible. This expanded voltage range provides additional design flexibility for new applications.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All three substitute parts are ROHS3 compliant and REACH unaffected. The original AT25DF021-MHF-Y compliance status is not specified in available documentation.

Q: What is the significance of Moisture Sensitivity Level (MSL) differences?

A: AT25DF021A-MHN-Y has MSL 3 (168-hour shelf life limit), matching the original part. AT25XE021A-MHN-T and AT25XE021A-MHN-Y have MSL 1 (unlimited shelf life), providing superior moisture tolerance and extended storage capability without baking requirements.

Q: Which substitute offers the best performance improvement?

A: AT25DF021A-MHN-Y provides the highest clock frequency (104 MHz) and fastest page write cycle time (2.5ms). AT25XE021A parts offer improved moisture sensitivity (MSL 1) and expanded voltage range, with 70 MHz operation suitable for most applications requiring the original 50 MHz part.

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