Equivalent & Substitute Parts for 25AA080CT-I/MS EEPROM Memory IC

Part Overview

The 25AA080CT-I/MS is an 8Kbit Serial Peripheral Interface (SPI) EEPROM memory integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates at 10 MHz clock frequency with a 1K x 8 memory organization, housed in an 8-MSOP surface mount package. The part is actively produced and ROHS3 compliant, designed for applications requiring persistent data storage with SPI interface compatibility.

Substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for compatible alternatives from qualified manufacturers. Substitution must maintain electrical compatibility across critical parameters including memory capacity, interface protocol, voltage supply range, operating temperature, and physical package dimensions.

Key Parameters

Parameter	Value	Criticality for Substitution
Memory Size	8Kbit	Critical - Must Match
Memory Organization	1K x 8	Critical - Must Match
Memory Interface	SPI	Critical - Must Match
Clock Frequency	10 MHz	Critical - Substitute Must Support
Voltage Supply Range	1.8V ~ 5.5V	Critical - Substitute Range Must Encompass
Operating Temperature	-40°C ~ 85°C	Critical - Substitute Must Support
Package Type	8-MSOP (0.118", 3.00mm Width)	Critical - Physical Compatibility
Write Cycle Time	5ms	Important - Performance Specification
Mounting Type	Surface Mount	Critical - Assembly Process
RoHS Status	ROHS3 Compliant	Important - Regulatory Compliance

Substitute Part Grouping Explanation

Substitution logic for the 25AA080CT-I/MS is based on the following allowed parameters:

Group 1: Direct Electrical & Package Equivalents (10 MHz, 8-MSOP) Parts that maintain identical clock frequency (10 MHz) and package format (8-MSOP) are considered direct substitutes. These parts preserve all electrical timing characteristics and require no PCB layout modifications.

Group 2: Higher Frequency Capable Substitutes (20 MHz, 8-TSSOP) Parts operating at 20 MHz clock frequency with 8-TSSOP package are compatible substitutes when the application circuit operates at 10 MHz or lower. The 8-TSSOP package (0.173", 4.40mm Width) differs physically from 8-MSOP but maintains surface mount compatibility. Higher frequency capability ensures backward compatibility with lower frequency requirements.

Group 3: Voltage Supply Range Considerations Substitutes must support the minimum voltage requirement of 1.8V and maximum of 5.5V. Parts with narrower ranges (2.5V ~ 5.5V) are acceptable only when system design guarantees operation within that narrower window.

Group 4: Temperature Grade Variants Standard industrial grade (-40°C ~ 85°C) substitutes are directly compatible. Automotive grade parts (-40°C ~ 125°C) provide extended temperature capability and are acceptable substitutes for standard applications.

Key Parameters Determining Substitution:

Memory capacity: 8Kbit (non-negotiable)
Interface protocol: SPI (non-negotiable)
Memory organization: 1K x 8 (non-negotiable)
Clock frequency: 10 MHz minimum support required
Voltage range: Must encompass 1.8V ~ 5.5V or be subset of application requirements
Package compatibility: Physical footprint and pin configuration
Write cycle time: 5ms or faster acceptable

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Voltage Supply	Operating Temp	Package Type	Write Cycle Time	Packaging Format
25AA080CT-I/MS	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-MSOP	5ms	Cut Tape & Digi-Reel
25AA080C-I/MS	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-MSOP	5ms	Tube
25AA080AT-I/MS	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-MSOP	5ms	Cut Tape
AT25080B-XHL-B	Microchip Technology	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	Tube
AT25080B-XHL-T	Microchip Technology	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	Cut Tape & Digi-Reel
BR25H080FVM-2CTR	Rohm Semiconductor	8Kbit	10 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	8-MSOP	4ms	Tape & Reel
CAT25080YI-GT3	onsemi	8Kbit	Not Specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	Tape & Reel
CAV25080YE-GT3	onsemi	8Kbit	20 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	5ms	Tape & Reel
M95080-DFDW6TP	STMicroelectronics	8Kbit	20 MHz	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	Tape & Reel
M95080-RDW6TP	STMicroelectronics	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	Tape & Reel
M95080-WDW6TP	STMicroelectronics	8Kbit	20 MHz	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Tier 1: Direct Substitutes (Identical Electrical & Physical Specifications)

The following parts are direct substitutes requiring no design modifications:

25AA080C-I/MS: Microchip Technology equivalent with identical electrical specifications. Differs only in packaging format (Tube vs. Cut Tape & Digi-Reel). Active product status. ROHS3 compliant. Suitable for applications where tube packaging is acceptable for assembly processes.
25AA080AT-I/MS: Microchip Technology equivalent with identical electrical specifications. Packaged in Cut Tape format. Active product status. ROHS3 compliant. DiGi-Electronics Programmable verified. Higher inventory availability (3528 pcs) compared to primary part.

Tier 2: Compatible Substitutes (Higher Frequency, Different Package)

The following parts are compatible when PCB layout accommodates 8-TSSOP package and application operates at 10 MHz or lower:

AT25080B-XHL-T: Microchip Technology 20 MHz capable part in 8-TSSOP package. Cut Tape & Digi-Reel packaging. Active product status. ROHS3 compliant. Highest inventory availability (6854 pcs). Backward compatible with 10 MHz operation. MSL rating 3 (168 Hours) requires controlled storage.
AT25080B-XHL-B: Microchip Technology 20 MHz capable part in 8-TSSOP package. Tube packaging. Active product status. ROHS3 compliant. Inventory 6000 pcs. MSL rating 3 (168 Hours).

Tier 3: Cross-Manufacturer Substitutes (Automotive Grade, Extended Temperature)

BR25H080FVM-2CTR: Rohm Semiconductor 10 MHz part in 8-MSOP package. Tape & Reel packaging. Automotive grade with AEC-Q100 qualification. Extended temperature range (-40°C ~ 125°C). Voltage range 2.5V ~ 5.5V (narrower than primary part). Write cycle time 4ms (faster than primary). Active product status. ROHS3 compliant. Suitable for automotive applications or when extended temperature capability is required.
CAV25080YE-GT3: onsemi 20 MHz part in 8-TSSOP package. Automotive grade with AEC-Q100 qualification. Extended temperature range (-40°C ~ 125°C). Voltage range 2.5V ~ 5.5V. Tape & Reel packaging. Active product status. ROHS3 compliant. Inventory 6850 pcs.
M95080-RDW6TP: STMicroelectronics 20 MHz part in 8-TSSOP package. Tape & Reel packaging. Voltage range 1.8V ~ 5.5V (matches primary part). Active product status. ROHS3 compliant. Highest inventory availability (33400 pcs) among all substitutes.
M95080-WDW6TP: STMicroelectronics 20 MHz part in 8-TSSOP package. Cut Tape & Digi-Reel packaging. Voltage range 2.5V ~ 5.5V. DiGi-Electronics Programmable verified. Active product status. ROHS3 compliant. Inventory 10093 pcs.

Tier 4: Specialized Substitutes (Specific Application Requirements)

CAT25080YI-GT3: onsemi part in 8-TSSOP package. Clock frequency not specified in documentation. Voltage range 1.8V ~ 5.5V. Tape & Reel packaging. Active product status. ROHS3 compliant. Inventory 7841 pcs. Use only when clock frequency specification is confirmed compatible.
M95080-DFDW6TP: STMicroelectronics 20 MHz part in 8-TSSOP package. Voltage range 1.7V ~ 5.5V (extends lower voltage limit). Tape & Reel packaging. Active product status. ROHS3 compliant. Inventory 785 pcs. Consider for low-voltage applications.

Selection Criteria Summary:

For identical form factor and electrical performance: Select 25AA080C-I/MS or 25AA080AT-I/MS
For higher frequency capability with different package: Select AT25080B-XHL-T or M95080-RDW6TP
For automotive applications: Select BR25H080FVM-2CTR or CAV25080YE-GT3
For maximum inventory availability: Select M95080-RDW6TP (33400 pcs)
For verified programmability: Select 25AA080AT-I/MS or M95080-WDW6TP

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. All parts are active products from qualified manufacturers.

Frequently Asked Questions (FAQ)

Q1: Can I use AT25080B-XHL-T as a direct replacement for 25AA080CT-I/MS without PCB modifications?

A: AT25080B-XHL-T is electrically compatible but requires PCB layout changes. The primary difference is package type: 25AA080CT-I/MS uses 8-MSOP (0.118", 3.00mm width) while AT25080B-XHL-T uses 8-TSSOP (0.173", 4.40mm width). Both are 8-pin surface mount packages with different physical dimensions and pin spacing. PCB footprint redesign is necessary. The 20 MHz clock frequency of AT25080B-XHL-T is backward compatible with 10 MHz operation.

Q2: What is the difference between Cut Tape, Tube, and Tape & Reel packaging formats?

A: These are packaging and delivery formats for surface mount components:

Cut Tape (CT): Individual components cut from tape, typically used for small quantity orders or manual assembly
Tube: Components packaged in plastic tubes, common for moderate quantities
Tape & Reel (TR): Components on continuous tape wound on reels, standard for high-volume automated assembly

All three formats contain identical components. Selection depends on assembly process requirements and order quantities. The 25AA080CT-I/MS designation indicates Cut Tape & Digi-Reel format.

Q3: Why do some substitutes have voltage range 2.5V ~ 5.5V instead of 1.8V ~ 5.5V?

A: Voltage supply range indicates the minimum and maximum operating voltages. Parts with 2.5V ~ 5.5V range cannot operate below 2.5V. If your application requires operation at 1.8V, you must select a substitute with 1.8V minimum specification. Parts with wider ranges (1.8V ~ 5.5V) are more flexible for diverse applications. BR25H080FVM-2CTR, CAV25080YE-GT3, and M95080-WDW6TP have narrower ranges and are suitable only for systems guaranteed to operate above 2.5V.

Q4: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive electronics qualification standard. Parts with this qualification (BR25H080FVM-2CTR and CAV25080YE-GT3) have undergone rigorous testing for automotive applications including extended temperature ranges, vibration resistance, and reliability requirements. These parts are suitable for automotive and industrial applications requiring higher reliability standards. Standard industrial parts without AEC-Q100 are acceptable for consumer and general industrial applications.

Q5: Can I substitute a 20 MHz part for a 10 MHz requirement?

A: Yes. A 20 MHz part can operate at 10 MHz or lower frequencies. Higher frequency capability ensures backward compatibility. However, the reverse is not true: a 10 MHz part cannot reliably operate at 20 MHz. When substituting with higher frequency parts (AT25080B-XHL-T, CAV25080YE-GT3, M95080 series), verify that your circuit design does not require the specific 10 MHz timing characteristics. Most applications benefit from higher frequency capability.

Q6: What is MSL (Moisture Sensitivity Level) and why does it matter?

A: MSL indicates how sensitive a component is to moisture absorption during storage. MSL 1 (Unlimited) means the part can be stored indefinitely without moisture control. MSL 3 (168 Hours) means the part must be used within 168 hours of opening the package or must be baked to remove absorbed moisture. AT25080B-XHL-B and AT25080B-XHL-T have MSL 3, requiring controlled storage and handling. All other substitutes have MSL 1. For high-volume production, MSL 1 parts are preferred to avoid baking procedures.

Q7: What does "DiGi-Electronics Programmable: Verified" mean?

A: This indicates that the part has been verified as programmable using DiGi-Electronics programming equipment and procedures. 25AA080AT-I/MS and M95080-WDW6TP have verified programmability status. Parts marked "Not Verified" may still be programmable but have not been formally verified through DiGi-Electronics testing. This is relevant only if you use DiGi-Electronics programming services.

Q8: Which substitute has the fastest write cycle time?

A: BR25H080FVM-2CTR has a write cycle time of 4ms, compared to 5ms for all other parts. This 1ms improvement is negligible for most applications. All parts meet the 5ms specification of the primary part, making write cycle time a non-critical differentiator for substitution purposes.

Q9: Are all substitutes ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected. This ensures compliance with environmental and hazardous substance regulations for EU and global markets.

Q10: What is the difference between 8-MSOP and 8-TSSOP packages?

A: Both are 8-pin surface mount packages with different physical dimensions:

8-MSOP: 0.118" width (3.00mm), narrower package
8-TSSOP: 0.173" width (4.40mm), wider package

Pin count and function are identical, but PCB footprints differ. MSOP is more compact; TSSOP provides slightly larger pin spacing. Selection depends on PCB layout constraints and assembly equipment capabilities. Substitution between these packages requires PCB redesign.

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