Equivalent & Substitute Parts for 25AA080AT-I/SN

Part Overview

The 25AA080AT-I/SN is an 8Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface operation at 10 MHz with 1K x 8 memory organization. This device operates across a supply voltage range of 1.8V to 5.5V and supports operating temperatures from -40°C to 85°C in an 8-SOIC surface mount package. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity level rating.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required, or when enhanced performance specifications (such as higher clock frequency or extended temperature range) are needed for specific application requirements.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Organization	1K x 8
Memory Interface	SPI
Clock Frequency	10 MHz
Write Cycle Time	5ms
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 25AA080AT-I/SN are categorized based on the following substitution criteria:

Direct Electrical Equivalents (Same Core Specifications): Parts sharing identical memory size (8Kbit), memory organization (1K x 8), SPI interface, and compatible voltage/temperature ranges qualify as direct substitutes. These include 25AA080A-I/SN from Microchip Technology and CAT25080VI-GT3 from onsemi.

Enhanced Performance Variants (Higher Clock Frequency): Parts operating at 20 MHz clock frequency (AT25080B-SSHL-T, M95080-DRMN3TP/K, M95080-DRMN8TP/K, M95080-RMN6TP) provide backward compatibility with 10 MHz applications while offering increased data throughput capability. These maintain identical memory capacity and organization.

Automotive-Grade Alternatives (Extended Temperature Range): Parts qualified to AEC-Q100 automotive standards with extended operating temperature ranges (-40°C to 125°C) such as BR25H080F-2CE2 and BR25H080F-2LBH2 from Rohm Semiconductor provide enhanced reliability for demanding environments while maintaining core memory specifications.

Legacy/Discontinued Status Parts: BR25L080F-WE2 from Rohm Semiconductor is marked "Not For New Designs" but remains functionally compatible with 5 MHz operation and identical memory organization.

Non-Compatible Reference: BR93H46RF-2LBH2 is listed in the original part's substitute field but operates as a 1Kbit Microwire interface device (64 x 16 organization) and is not electrically equivalent due to different memory size and interface protocol.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency (MHz)	Voltage Supply (V)	Operating Temp (°C)	Package	Write Cycle (ms)	Product Status
25AA080AT-I/SN	Microchip	8Kbit	10	1.8~5.5	-40~85	8-SOIC (3.90mm)	5	Active
25AA080A-I/SN	Microchip	8Kbit	10	1.8~5.5	-40~85	8-SOIC (3.90mm)	5	Active
AT25080B-SSHL-T	Microchip	8Kbit	20	1.8~5.5	-40~85	8-SOIC (3.90mm)	5	Active
BR25H080F-2CE2	Rohm	8Kbit	10	2.5~5.5	-40~125	8-SOP (4.40mm)	4	Active
BR25H080F-2LBH2	Rohm	8Kbit	10	2.5~5.5	-40~125	8-SOP (4.40mm)	4	Active
BR25L080F-WE2	Rohm	8Kbit	5	1.8~5.5	-40~85	8-SOP (4.40mm)	5	Not For New Designs
CAT25080VI-GT3	onsemi	8Kbit	Not Specified	1.8~5.5	-40~85	8-SOIC (3.90mm)	5	Active
M95080-DRMN3TP/K	STMicroelectronics	8Kbit	20	1.8~5.5	-40~125	8-SOIC (3.90mm)	4	Active
M95080-DRMN8TP/K	STMicroelectronics	8Kbit	20	1.8~5.5	-40~105	8-SOIC (3.90mm)	4	Active
M95080-RMN6TP	STMicroelectronics	8Kbit	20	1.8~5.5	-40~85	8-SOIC (3.90mm)	5	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): 25AA080A-I/SN and CAT25080VI-GT3 provide pin-compatible substitution with matching electrical characteristics. Both maintain ROHS3 compliance and unlimited MSL rating. Selection between these depends on packaging format availability (Tube vs. Cut Tape & Digi-Reel).

For Enhanced Performance Applications: AT25080B-SSHL-T, M95080-DRMN3TP/K, M95080-DRMN8TP/K, and M95080-RMN6TP offer 20 MHz operation, providing 2x clock frequency improvement while maintaining backward compatibility with 10 MHz protocol implementations. These are suitable for applications requiring higher data throughput without circuit redesign.

For Automotive and Extended Temperature Requirements: BR25H080F-2CE2 and BR25H080F-2LBH2 from Rohm Semiconductor provide AEC-Q100 qualification with -40°C to 125°C operating range, appropriate for automotive and industrial applications. Note the minimum supply voltage is 2.5V (versus 1.8V for the primary part).

For New Designs: Avoid BR25L080F-WE2 due to "Not For New Designs" status, despite functional compatibility.

Package Consideration: Rohm parts (BR25H080F series) use 8-SOP package with 4.40mm width versus 3.90mm width for Microchip and onsemi parts. Physical board layout verification is required before substitution.

Frequently Asked Questions (FAQ)

Q: Can 25AA080A-I/SN directly replace 25AA080AT-I/SN? A: Yes. Both parts share identical electrical specifications (8Kbit, 1K x 8, SPI, 10 MHz, 1.8V~5.5V, -40°C~85°C). The primary difference is packaging format (Tube vs. Tape & Reel). Pin configuration and functional operation are equivalent.

Q: What is the advantage of using AT25080B-SSHL-T or M95080 series parts? A: These parts operate at 20 MHz clock frequency, doubling the data transfer rate compared to the 10 MHz primary part. They maintain identical memory capacity and voltage range, providing backward compatibility with existing firmware while enabling faster SPI communication.

Q: Are Rohm BR25H080F parts suitable for the same applications? A: BR25H080F-2CE2 and BR25H080F-2LBH2 are functionally compatible for 8Kbit SPI EEPROM applications. However, verify two constraints: (1) minimum supply voltage is 2.5V instead of 1.8V, and (2) package width is 4.40mm (8-SOP) versus 3.90mm (8-SOIC), requiring PCB layout confirmation.

Q: Why is BR93H46RF-2LBH2 listed but not recommended? A: BR93H46RF-2LBH2 is a 1Kbit Microwire interface device with 64 x 16 organization, fundamentally different from the 8Kbit SPI architecture. It is not electrically equivalent and cannot substitute without complete circuit redesign.

Q: Can I use BR25L080F-WE2 in new product designs? A: No. This part carries "Not For New Designs" status from the manufacturer. While functionally compatible at 5 MHz operation, it should be avoided for new development. Use active-status alternatives instead.

Q: What does AEC-Q100 qualification mean for M95080 and BR25H080F parts? A: AEC-Q100 qualification indicates automotive-grade reliability testing and extended temperature operation (-40°C to 125°C). These parts are suitable for automotive, industrial, and harsh environment applications requiring enhanced reliability margins.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and unlimited MSL (Moisture Sensitivity Level) rating, matching the primary part's environmental compliance profile.

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