25LC080A-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 25LC080A-E/ST is an 8Kbit Serial Peripheral Interface (SPI) EEPROM memory IC manufactured by Microchip Technology. This non-volatile memory device operates at 10 MHz clock frequency with a supply voltage range of 2.5V to 5.5V and is housed in an 8-TSSOP surface mount package. The part is currently in active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical specifications, memory capacity, interface protocol, and package form factor are maintained across different manufacturers while meeting specific application temperature and operational requirements.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	8Kbit
Memory Organization	1K x 8
Memory Interface	SPI
Clock Frequency	10 MHz
Write Cycle Time	5ms
Supply Voltage 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

Substitution eligibility for the 25LC080A-E/ST is determined by the following critical parameters: 8Kbit memory capacity, 1K x 8 organization, SPI interface protocol, 8-TSSOP package form factor, and surface mount mounting type. All identified substitute parts maintain these core specifications. Secondary parameters including clock frequency, write cycle time, supply voltage range, and operating temperature range are evaluated to determine functional compatibility within specific application contexts. Parts are grouped based on whether they meet the full temperature range (-40°C to 125°C) of the primary part or operate within a narrower range (-40°C to 85°C). Clock frequency variations (5 MHz, 10 MHz, or 20 MHz) and write cycle time differences (4ms or 5ms) are documented as they may affect system performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency (MHz)	Write Cycle Time (ms)	Supply Voltage (V)	Operating Temperature (°C)	Package	Automotive Grade
25LC080A-E/ST	Microchip Technology	8Kbit	10	5	2.5 ~ 5.5	-40 ~ 125	8-TSSOP	No
25LC080A-I/ST	Microchip Technology	8Kbit	10	5	2.5 ~ 5.5	-40 ~ 85	8-TSSOP	No
BR25H080FVT-2CE2	Rohm Semiconductor	8Kbit	10	4	2.5 ~ 5.5	-40 ~ 125	8-TSSOP-B	Yes (AEC-Q100)
CAT25080YI-GT3	onsemi	8Kbit	Not specified	5	1.8 ~ 5.5	-40 ~ 85	8-TSSOP	No
CAV25080YE-GT3	onsemi	8Kbit	20	5	2.5 ~ 5.5	-40 ~ 125	8-TSSOP	Yes (AEC-Q100)
M95080-DFDW6TP	STMicroelectronics	8Kbit	20	5	1.7 ~ 5.5	-40 ~ 85	8-TSSOP	No
M95080-DRDW3TP/K	STMicroelectronics	8Kbit	20	4	1.8 ~ 5.5	-40 ~ 125	8-TSSOP	Yes (AEC-Q100)
M95080-RDW6TP	STMicroelectronics	8Kbit	20	5	1.8 ~ 5.5	-40 ~ 85	8-TSSOP	No
M95080-WDW6TP	STMicroelectronics	8Kbit	20	5	2.5 ~ 5.5	-40 ~ 85	8-TSSOP	No
R1EX25008ATA00I#S0	Renesas Electronics Corporation	8Kbit	5	5	1.8 ~ 5.5	-40 ~ 85	8-TSSOP	No

Engineering Selection Recommendations

Full Temperature Range Compatibility (-40°C to 125°C): The 25LC080A-E/ST operates across the extended temperature range of -40°C to 125°C. Direct substitutes maintaining this full range include 25LC080A-I/ST (Microchip Technology), BR25H080FVT-2CE2 (Rohm Semiconductor with AEC-Q100 automotive qualification), CAV25080YE-GT3 (onsemi with AEC-Q100 automotive qualification), and M95080-DRDW3TP/K (STMicroelectronics with AEC-Q100 automotive qualification).

Reduced Temperature Range (-40°C to 85°C): Substitute parts with narrower operating temperature ranges include 25LC080A-I/ST, CAT25080YI-GT3, M95080-DFDW6TP, M95080-RDW6TP, M95080-WDW6TP, and R1EX25008ATA00I#S0. These parts are suitable for applications not requiring the extended upper temperature limit.

Automotive Grade Qualification: Parts carrying AEC-Q100 automotive qualification are BR25H080FVT-2CE2, CAV25080YE-GT3, and M95080-DRDW3TP/K. These parts are appropriate for automotive and mission-critical applications requiring formal qualification documentation.

Clock Frequency Considerations: The primary part operates at 10 MHz. Substitute parts with higher clock frequencies (20 MHz) include CAV25080YE-GT3, M95080-DFDW6TP, M95080-DRDW3TP/K, M95080-RDW6TP, and M95080-WDW6TP. The part R1EX25008ATA00I#S0 operates at 5 MHz. Higher clock frequency parts are backward compatible with 10 MHz system requirements.

Write Cycle Time: The primary part specifies 5ms write cycle time. BR25H080FVT-2CE2 and M95080-DRDW3TP/K offer faster 4ms write cycle times. All other substitutes maintain the 5ms specification.

Supply Voltage Range: The primary part operates from 2.5V to 5.5V. Substitute parts with extended lower voltage limits (1.7V or 1.8V) provide additional flexibility for low-power applications: M95080-DFDW6TP (1.7V minimum), CAT25080YI-GT3, M95080-DRDW3TP/K, M95080-RDW6TP, and R1EX25008ATA00I#S0 (all 1.8V minimum).

Frequently Asked Questions (FAQ)

Q: Can I substitute the 25LC080A-E/ST with 25LC080A-I/ST? A: Yes, both parts are manufactured by Microchip Technology with identical electrical specifications (8Kbit, SPI, 10 MHz, 8-TSSOP package). The primary difference is operating temperature range: 25LC080A-E/ST operates -40°C to 125°C while 25LC080A-I/ST operates -40°C to 85°C. Substitution is valid for applications within the -40°C to 85°C range.

Q: What is the difference between 8-TSSOP and 8-TSSOP-B packages? A: Both are 8-pin thin shrink small outline packages with identical 0.173" width and 4.40mm dimensions. The -B designation indicates a variant package form. Physical compatibility is maintained for PCB footprints designed for 8-TSSOP packages.

Q: Are automotive-grade parts (AEC-Q100) required for my application? A: AEC-Q100 qualification is required only for automotive and mission-critical applications. Automotive-qualified substitutes are BR25H080FVT-2CE2, CAV25080YE-GT3, and M95080-DRDW3TP/K. Standard industrial-grade parts are suitable for consumer and general industrial applications.

Q: Can I use a 20 MHz part in place of the 10 MHz 25LC080A-E/ST? A: Yes. Parts with higher clock frequencies (20 MHz) are backward compatible with 10 MHz system requirements. The 20 MHz parts include CAV25080YE-GT3, M95080-DFDW6TP, M95080-DRDW3TP/K, M95080-RDW6TP, and M95080-WDW6TP. System performance will not be degraded by using a higher-frequency part.

Q: What about the 5 MHz part R1EX25008ATA00I#S0? A: R1EX25008ATA00I#S0 operates at 5 MHz, which is lower than the primary part's 10 MHz specification. This part is not recommended as a direct substitute if the system requires 10 MHz operation, as it may not meet timing requirements.

Q: Which substitute offers the best low-voltage performance? A: M95080-DFDW6TP offers the lowest minimum supply voltage at 1.7V, followed by CAT25080YI-GT3, M95080-DRDW3TP/K, M95080-RDW6TP, and R1EX25008ATA00I#S0 at 1.8V minimum. These parts are suitable for battery-powered and low-power applications.

Q: Is the write cycle time difference between 4ms and 5ms significant? A: Write cycle time affects data programming speed. BR25H080FVT-2CE2 and M95080-DRDW3TP/K offer 4ms write cycles compared to the primary part's 5ms. This results in approximately 20% faster write operations. The difference is significant only in applications requiring high-speed data logging or frequent memory updates.

Q: Can I mix different manufacturers' parts in the same design? A: Yes. All substitute parts maintain identical memory capacity (8Kbit), organization (1K x 8), interface (SPI), and package (8-TSSOP). Electrical compatibility is ensured across manufacturers. Design verification should confirm that specific voltage, temperature, and timing requirements are met by each selected part.

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