Equivalent & Substitute Parts for 25AA080BT-I/ST

Part Overview

The 25AA080BT-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 device is classified as Active product status and is ROHS3 compliant. Substitute parts are necessary to address packaging format requirements, supply chain availability, performance specifications, or compliance variations across different manufacturing sources and operational grades.

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
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 25AA080BT-I/ST is determined by the following critical parameters: memory capacity (8Kbit), memory organization (1K x 8), SPI interface protocol, package form factor (8-TSSOP), and surface mount technology. Parts are grouped into three categories based on operational specifications:

Category 1: Direct Electrical Equivalents (10 MHz Operation) Parts maintaining identical clock frequency (10 MHz), voltage supply range (1.8V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). These parts are pin-compatible and functionally interchangeable without circuit modification.

Category 2: Enhanced Performance Substitutes (20 MHz Operation) Parts with doubled clock frequency (20 MHz) while maintaining compatible voltage supply and temperature ranges. These parts provide higher data throughput and are backward compatible with 10 MHz designs.

Category 3: Automotive-Grade Alternatives Parts qualified to AEC-Q100 automotive standards with extended temperature ranges (-40°C ~ 125°C) and enhanced reliability specifications. These parts meet automotive qualification requirements while maintaining core memory specifications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Voltage Supply	Operating Temperature	Write Cycle Time	Package	RoHS Status	Automotive Grade
25AA080BT-I/ST	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	ROHS3	No
25AA080B-I/ST	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Non-compliant	No
25AA080CT-I/ST	Microchip Technology	8Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	ROHS3	No
AT25080B-XHL-B	Microchip Technology	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	ROHS3	No
AT25080B-XHL-T	Microchip Technology	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	ROHS3	No
BR25H080FVT-2CE2	Rohm Semiconductor	8Kbit	10 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	4ms	8-TSSOP-B	ROHS3	Yes (AEC-Q100)
CAT25080YI-GT3	onsemi	8Kbit	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	ROHS3	No
CAV25080YE-GT3	onsemi	8Kbit	20 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	5ms	8-TSSOP	ROHS3	Yes (AEC-Q100)
M95080-DFDW6TP	STMicroelectronics	8Kbit	20 MHz	1.7V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	ROHS3	No
M95080-DRDW3TP/K	STMicroelectronics	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	4ms	8-TSSOP	ROHS3	Yes (AEC-Q100)
M95080-DRDW8TP/K	STMicroelectronics	8Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 105°C	4ms	8-TSSOP	ROHS3	Yes (AEC-Q100)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications) The 25AA080CT-I/ST serves as the primary direct substitute, maintaining all electrical and thermal specifications while offering ROHS3 compliance identical to the main part. The 25AA080B-I/ST provides functional equivalence but carries RoHS non-compliance status and should be selected only when legacy compliance requirements are not applicable.

For Enhanced Performance Applications The AT25080B-XHL-T and AT25080B-XHL-B provide doubled clock frequency (20 MHz) operation while maintaining backward compatibility with 10 MHz designs. These parts are suitable for applications requiring higher data throughput without thermal or voltage constraint modifications.

For Automotive and Extended Temperature Applications The BR25H080FVT-2CE2, CAV25080YE-GT3, M95080-DRDW3TP/K, and M95080-DRDW8TP/K are AEC-Q100 qualified alternatives with extended operating temperature ranges (-40°C ~ 125°C). These parts are mandatory for automotive-grade applications and provide enhanced reliability specifications. The M95080-DRDW8TP/K extends the upper temperature limit to 105°C, suitable for high-temperature automotive environments.

For Supply Chain Flexibility Multi-source availability is provided across Microchip Technology, Rohm Semiconductor, onsemi, and STMicroelectronics. Selection should prioritize ROHS3 compliance and active product status for long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can the 25AA080BT-I/ST be replaced with a 20 MHz variant without circuit modification? A: Yes. The AT25080B-XHL-T and AT25080B-XHL-B operate at 20 MHz but maintain full backward compatibility with 10 MHz designs. The SPI interface protocol and electrical specifications remain identical, allowing direct substitution.

Q: What is the difference between 8-TSSOP and 8-TSSOP-B packaging? A: Both package types maintain identical pin pitch (0.173", 4.40mm width) and surface mount compatibility. The BR25H080FVT-2CE2 uses 8-TSSOP-B designation but is mechanically and electrically compatible with standard 8-TSSOP footprints.

Q: Are automotive-grade parts (AEC-Q100) suitable for non-automotive applications? A: Yes. Automotive-qualified parts exceed standard reliability requirements and operate across extended temperature ranges. These parts are fully compatible with commercial applications and provide enhanced performance margins.

Q: What is the minimum voltage supply requirement across all substitutes? A: The 25AA080BT-I/ST and most substitutes operate from 1.8V minimum. The BR25H080FVT-2CE2 and CAV25080YE-GT3 require 2.5V minimum, and the M95080-DFDW6TP operates from 1.7V minimum. Circuit design must accommodate the highest minimum voltage requirement of the selected part.

Q: Which substitute offers the fastest write cycle time? A: The BR25H080FVT-2CE2, M95080-DRDW3TP/K, and M95080-DRDW8TP/K provide 4ms write cycle time compared to the 5ms specification of the main part, offering improved programming performance.

Q: Is RoHS compliance mandatory for all substitutes? A: The 25AA080BT-I/ST is ROHS3 compliant. All recommended substitutes maintain ROHS3 compliance except the 25AA080B-I/ST, which is RoHS non-compliant. Selection should prioritize ROHS3 status for regulatory compliance.

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