25LC080AT-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 25LC080AT-E/ST is an 8Kbit SPI EEPROM memory IC manufactured by Microchip Technology, designed for non-volatile data storage applications requiring SPI serial interface communication. This device operates at 10 MHz clock frequency with a 5ms write cycle time and supports supply voltages from 2.5V to 5.5V across an operating temperature range of -40°C to 125°C. The component is housed in an 8-TSSOP surface mount package and maintains active product status with ROHS3 compliance. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package form factor, and electrical operating parameters to ensure direct functional replacement in circuit designs.

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	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 25LC080AT-E/ST are qualified based on the following critical parameters that determine functional compatibility:

Core Compatibility Criteria:

Memory capacity of 8Kbit with 1K x 8 organization
SPI serial interface protocol
8-TSSOP surface mount package form factor
Supply voltage range encompassing 2.5V to 5.5V minimum
Operating temperature range supporting -40°C to 125°C minimum
Write cycle time of 5ms or faster
ROHS3 compliance and active product status

Substitute parts are grouped into two categories based on clock frequency capability: standard 10 MHz operation and enhanced 20 MHz operation. Parts operating at 20 MHz are backward compatible with 10 MHz applications. Parts with automotive qualification (AEC-Q100) and extended temperature ranges provide additional design flexibility for demanding applications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Write Cycle Time	Voltage Supply	Operating Temperature	Package	AEC-Q100
25LC080AT-E/ST	Microchip Technology	8Kbit	10 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	No
BR25H080FVT-2CE2	Rohm Semiconductor	8Kbit	10 MHz	4ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP-B	Yes
CAT25080YI-GT3	onsemi	8Kbit	Not specified	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No
CAV25080YE-GT3	onsemi	8Kbit	20 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Yes
M95080-DFDW6TP	STMicroelectronics	8Kbit	20 MHz	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No
M95080-DRDW3TP/K	STMicroelectronics	8Kbit	20 MHz	4ms	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Yes
M95080-DRDW8TP/K	STMicroelectronics	8Kbit	20 MHz	4ms	1.8V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	Yes
M95080-RDW6TP	STMicroelectronics	8Kbit	20 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No
M95080-WDW6TP	STMicroelectronics	8Kbit	20 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No
R1EX25008ATA00I#S0	Renesas Electronics Corporation	8Kbit	5 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	No

Engineering Selection Recommendations

Direct Replacement (Equivalent Performance): BR25H080FVT-2CE2 from Rohm Semiconductor provides equivalent functionality with improved write cycle time (4ms versus 5ms) and maintains the full -40°C to 125°C operating temperature range. This part carries AEC-Q100 automotive qualification, making it suitable for applications requiring automotive-grade components.

Enhanced Performance Substitutes (20 MHz Operation): CAV25080YE-GT3, M95080-DRDW3TP/K, and M95080-DRDW8TP/K operate at 20 MHz clock frequency, providing performance headroom for timing-critical applications while maintaining backward compatibility with 10 MHz designs. M95080-DRDW3TP/K and M95080-DRDW8TP/K include AEC-Q100 qualification and support the full -40°C to 125°C temperature range.

Standard Performance Alternatives: M95080-RDW6TP and M95080-WDW6TP from STMicroelectronics offer 20 MHz operation with standard write cycle times. M95080-WDW6TP maintains the 2.5V to 5.5V supply voltage range matching the original part.

Lower Clock Frequency Option: R1EX25008ATA00I#S0 from Renesas Electronics operates at 5 MHz and is suitable for applications with relaxed timing requirements. This part supports extended supply voltage range down to 1.8V.

Limited Temperature Range Consideration: CAT25080YI-GT3 and several STMicroelectronics variants operate only to 85°C maximum, making them unsuitable for applications requiring the full -40°C to 125°C range of the original 25LC080AT-E/ST.

All substitute parts maintain ROHS3 compliance and active product status consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can I use a 20 MHz EEPROM substitute in place of the 10 MHz 25LC080AT-E/ST? A: Yes. Parts operating at 20 MHz clock frequency are fully backward compatible with 10 MHz applications. The higher clock speed provides performance margin without affecting circuit functionality.

Q: What is the significance of AEC-Q100 qualification on substitute parts? A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This certification is required for automotive applications but is optional for general industrial or consumer applications.

Q: Are all substitute parts available in the same 8-TSSOP package? A: Yes. All listed substitute parts use the 8-TSSOP surface mount package with 0.173" width and 4.40mm dimensions, ensuring mechanical compatibility with the original 25LC080AT-E/ST footprint.

Q: Which substitute part best matches the original 25LC080AT-E/ST specifications? A: BR25H080FVT-2CE2 from Rohm Semiconductor provides the closest match with identical 10 MHz clock frequency, matching supply voltage range (2.5V to 5.5V), and full operating temperature range (-40°C to 125°C). It also includes improved write cycle time of 4ms.

Q: Can I use the R1EX25008ATA00I#S0 if my application only requires 5 MHz operation? A: Yes, if your circuit design operates at 5 MHz or lower clock frequencies. However, this part operates only to 85°C maximum temperature, which may be limiting for industrial applications requiring -40°C to 125°C range.

Q: What is the difference between M95080-DRDW3TP/K and M95080-DRDW8TP/K? A: Both parts operate at 20 MHz with 4ms write cycle time and AEC-Q100 qualification. The primary difference is operating temperature range: M95080-DRDW3TP/K supports -40°C to 125°C, while M95080-DRDW8TP/K supports -40°C to 105°C.

Q: Are there any supply voltage compatibility concerns when substituting parts? A: Most substitute parts support the 2.5V to 5.5V range of the original. CAT25080YI-GT3, M95080-DFDW6TP, M95080-DRDW3TP/K, M95080-DRDW8TP/K, M95080-RDW6TP, and R1EX25008ATA00I#S0 support extended lower voltage operation down to 1.7V or 1.8V, providing additional design flexibility.

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