Equivalent & Substitute Parts for 25AA080DT-I/ST

Part Overview

The 25AA080DT-I/ST is an 8Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface operation at 10 MHz with 8-TSSOP surface mount packaging. This non-volatile memory device operates across a supply voltage range of 1.8V to 5.5V and supports industrial temperature ranges from -40°C to 85°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching core memory specifications, electrical parameters, and physical packaging requirements to ensure functional interchangeability in circuit applications.

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-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 25AA080DT-I/ST are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Memory capacity: 8Kbit
Memory organization: 1K x 8
Interface protocol: SPI
Package type: 8-TSSOP
Supply voltage compatibility: Minimum 1.8V support
Operating temperature range: Minimum -40°C to 85°C support

Grouping Logic:

Group 1 - Direct Equivalents (Identical Specifications): Parts matching all primary criteria including 10 MHz clock frequency, 5ms write cycle time, 1.8V–5.5V supply range, and -40°C to 85°C operating temperature.

Group 2 - Enhanced Performance Substitutes (Higher Clock Frequency): Parts with 20 MHz clock frequency instead of 10 MHz, maintaining all other core specifications. These parts operate at higher data rates while preserving backward compatibility in applications not requiring the original 10 MHz limitation.

Group 3 - Automotive Grade Substitutes (Extended Temperature & Qualification): Parts qualified to AEC-Q100 automotive standards with extended operating temperature ranges (-40°C to 125°C) and automotive-grade reliability certifications. These parts maintain core memory specifications while offering enhanced environmental performance.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Write Cycle Time	Voltage Supply	Operating Temperature	Package	Automotive Grade	MSL Rating
25AA080DT-I/ST	Microchip Technology	8Kbit	10 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No	1
25AA080CT-I/ST	Microchip Technology	8Kbit	10 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No	1
AT25080B-XHL-T	Microchip Technology	8Kbit	20 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No	3
AT25080B-XHL-B	Microchip Technology	8Kbit	20 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No	3
BR25H080FVT-2CE2	Rohm Semiconductor	8Kbit	10 MHz	4ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP-B	Yes (AEC-Q100)	1
CAT25080YI-GT3	onsemi	8Kbit	Not specified	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No	1
CAV25080YE-GT3	onsemi	8Kbit	20 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Yes (AEC-Q100)	1
M95080-DFDW6TP	STMicroelectronics	8Kbit	20 MHz	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No	1
M95080-DRDW3TP/K	STMicroelectronics	8Kbit	20 MHz	4ms	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Yes (AEC-Q100)	1
M95080-DRDW8TP/K	STMicroelectronics	8Kbit	20 MHz	4ms	1.8V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	Yes (AEC-Q100)	1
M95080-RDW6TP	STMicroelectronics	8Kbit	20 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No	1

Engineering Selection Recommendations

For Direct Replacement (Industrial Applications): The 25AA080CT-I/ST from Microchip Technology provides identical electrical and thermal specifications to the 25AA080DT-I/ST, differing only in packaging format (Tape & Reel vs. alternative packaging). This part maintains full compatibility for applications requiring 10 MHz SPI operation within industrial temperature ranges.

For Enhanced Clock Frequency (Non-Automotive): The AT25080B-XHL-T and M95080-RDW6TP offer 20 MHz clock frequency while maintaining the 1.8V–5.5V supply range and -40°C to 85°C operating temperature. These parts are suitable for applications requiring higher data throughput without automotive qualification requirements. Note that AT25080B variants carry MSL 3 rating (168 hours), requiring controlled moisture handling during storage and assembly.

For Automotive and Extended Temperature Applications: The BR25H080FVT-2CE2, CAV25080YE-GT3, M95080-DRDW3TP/K, and M95080-DRDW8TP/K are AEC-Q100 qualified automotive-grade parts with extended operating temperature ranges. These parts are appropriate for automotive and industrial applications requiring enhanced reliability certifications. The CAV25080YE-GT3 and M95080-DRDW3TP/K support -40°C to 125°C operation, while M95080-DRDW8TP/K operates to -40°C to 105°C.

Supply Voltage Considerations: The BR25H080FVT-2CE2 and CAV25080YE-GT3 specify minimum supply voltage of 2.5V, requiring verification that application power supplies meet this threshold. The M95080-DFDW6TP supports 1.7V minimum, providing extended low-voltage operation compared to the 1.8V minimum of the primary part.

Packaging and Moisture Sensitivity: All substitute parts maintain 8-TSSOP surface mount packaging compatibility. The BR25H080FVT-2CE2 uses 8-TSSOP-B variant. Parts with MSL 1 rating (unlimited moisture sensitivity) require no special handling. AT25080B variants with MSL 3 rating require baking and controlled moisture exposure during assembly.

Frequently Asked Questions (FAQ)

Q: Can I use a 20 MHz substitute part in place of the 10 MHz 25AA080DT-I/ST?

A: Yes. Parts with 20 MHz clock frequency (AT25080B-XHL-T, CAV25080YE-GT3, M95080 variants) are backward compatible with applications designed for 10 MHz operation. The higher clock frequency does not create incompatibility; the device operates at the speed commanded by the host controller. Verify that your application circuit does not impose a maximum clock frequency limitation.

Q: What is the difference between 25AA080DT-I/ST and 25AA080CT-I/ST?

A: These parts are electrically and functionally identical. The difference lies in packaging format: DT-I/ST uses Tape & Reel packaging, while CT-I/ST uses alternative packaging. Both maintain identical memory specifications, voltage ranges, temperature ratings, and SPI interface characteristics.

Q: Are automotive-grade parts (AEC-Q100) suitable for non-automotive applications?

A: Yes. Automotive-grade parts such as BR25H080FVT-2CE2, CAV25080YE-GT3, and M95080-DRDW3TP/K meet or exceed industrial specifications and are fully compatible with non-automotive applications. These parts offer enhanced reliability and extended temperature operation, making them suitable for demanding industrial and commercial environments.

Q: What does MSL 3 rating mean for AT25080B parts?

A: MSL (Moisture Sensitivity Level) 3 indicates the part requires moisture control during storage and assembly. MSL 3 parts must be baked before reflow soldering and have a 168-hour floor life after moisture exposure. MSL 1 parts (unlimited rating) require no special moisture handling. Verify your assembly process can accommodate MSL 3 requirements before selecting AT25080B variants.

Q: Can I substitute a part with a lower minimum supply voltage?

A: Yes, if your application operates above the substitute part's minimum voltage. For example, M95080-DFDW6TP with 1.7V minimum can replace the 25AA080DT-I/ST (1.8V minimum) in applications operating at 1.7V or higher. However, verify your actual supply voltage specification before making this substitution.

Q: What is the significance of the 8-TSSOP-B package variant used by BR25H080FVT-2CE2?

A: The 8-TSSOP-B is a variant of the standard 8-TSSOP package with identical pin pitch and footprint compatibility. The -B designation indicates automotive-grade qualification. PCB footprints designed for standard 8-TSSOP are compatible with 8-TSSOP-B devices.

Q: Which substitute part offers the fastest write cycle time?

A: The BR25H080FVT-2CE2, M95080-DRDW3TP/K, and M95080-DRDW8TP/K all specify 4ms write cycle time, compared to 5ms for the 25AA080DT-I/ST. This 1ms improvement may be relevant for applications with strict timing requirements, though both values are within typical EEPROM performance ranges.

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