25LC020A-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 25LC020A-I/ST is a 2Kbit 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 rating (MSL 1).

Equivalent and substitute parts are necessary when the original part becomes unavailable, when alternative packaging formats are required, or when enhanced performance specifications (such as higher clock frequency or extended temperature ranges) are needed for specific applications.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	SPI
Clock Frequency	10 MHz
Supply Voltage Range	2.5V ~ 5.5V
Write Cycle Time	5ms
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 25LC020A-I/ST is determined by the following critical parameters:

Core Compatibility Requirements:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: SPI
Package / Case: 8-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount
Supply Voltage: Must support 2.5V minimum
Operating Temperature: Must support -40°C to 85°C minimum range

Performance Variations Allowed:

Clock Frequency: 5 MHz to 20 MHz (higher frequencies are backward compatible)
Write Cycle Time: 4ms to 5ms
Supply Voltage Upper Limit: 5.5V or higher
Extended Temperature Range: Up to 125°C (exceeds base requirement)
MSL Rating: 1 to 3 (higher ratings indicate stricter moisture control)

Packaging Format Variations:

Tube packaging (original format)
Tape & Reel (TR) packaging (alternative format for automated assembly)

Substitute parts meeting these criteria are functionally interchangeable in applications designed for the 25LC020A-I/ST.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Memory Size	Clock Frequency	Supply Voltage	Operating Temperature	Write Cycle Time	Package	Packaging Format	Product Status	MSL Rating
25LC020A-I/ST	Microchip Technology	2Kbit	10 MHz	2.5V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Tube	Active	1
AT25020B-XHL-B	Microchip Technology	2Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Tube	Active	3
AT25020B-XHL-T	Microchip Technology	2Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Tape & Reel	Active	3
BR25H020FVT-2CE2	Rohm Semiconductor	2Kbit	10 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	4ms	8-TSSOP	Tape & Reel	Active	1
CAT25020YI-G	onsemi	2Kbit	Not Specified	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Not Specified	Obsolete	1
CAT25020YI-GT3	onsemi	2Kbit	Not Specified	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Tape & Reel	Active	1
CAV25020YE-GT3	onsemi	2Kbit	10 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	5ms	8-TSSOP	Tape & Reel	Active	1
M95020-DRDW3TP/K	STMicroelectronics	2Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	4ms	8-TSSOP	Tape & Reel	Active	1
M95020-RDW6TP	STMicroelectronics	2Kbit	20 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Tape & Reel	Active	1
M95020-WDW6TP	STMicroelectronics	2Kbit	20 MHz	2.5V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Tape & Reel	Active	1
R1EX25002ATA00I#S0	Renesas Electronics Corporation	2Kbit	5 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	8-TSSOP	Tape & Reel	Active	1

Engineering Selection Recommendations

Direct Substitutes (Identical Specifications): No substitute parts possess identical specifications to the 25LC020A-I/ST across all parameters. However, the following parts meet all core compatibility requirements with minor specification enhancements:

Recommended for Standard Applications:

M95020-WDW6TP (STMicroelectronics): Matches supply voltage range (2.5V ~ 5.5V), operating temperature (-40°C ~ 85°C), and write cycle time (5ms). Offers higher clock frequency (20 MHz) and Tape & Reel packaging. Product status: Active. MSL 1 rating.
CAV25020YE-GT3 (onsemi): Matches supply voltage range (2.5V ~ 5.5V), clock frequency (10 MHz), and write cycle time (5ms). Extends operating temperature to -40°C ~ 125°C. Tape & Reel packaging. Product status: Active. MSL 1 rating. Automotive qualified (AEC-Q100).

Recommended for High-Speed Applications:

M95020-DRDW3TP/K (STMicroelectronics): Supports 20 MHz clock frequency with 4ms write cycle time. Extended operating temperature (-40°C ~ 125°C). Automotive qualified (AEC-Q100). Product status: Active. MSL 1 rating.

Recommended for Low-Voltage Applications:

AT25020B-XHL-T (Microchip Technology): Supports lower minimum supply voltage (1.8V) while maintaining 5.5V upper limit. Offers 20 MHz clock frequency. Tape & Reel packaging. Product status: Active.

Parts to Avoid:

CAT25020YI-G (onsemi): Product status is Obsolete. Not recommended for new designs.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher clock frequency than the original 25LC020A-I/ST?

A: Yes. Higher clock frequencies (such as 20 MHz) are backward compatible with applications designed for 10 MHz operation. The substitute part will function correctly at the lower frequency if the application does not require the higher speed capability.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is suitable for manual assembly and small-volume applications. Tape & Reel (TR) packaging is designed for automated pick-and-place assembly equipment and high-volume production. Both formats contain identical die and electrical specifications. Selection depends on assembly process requirements.

Q: Can I substitute a part with a lower operating temperature range?

A: No. If your application requires operation at -40°C to 85°C, you must select a substitute part that supports this full range. Parts with narrower temperature ranges are not suitable.

Q: What does MSL rating mean, and does it affect substitution?

A: MSL (Moisture Sensitivity Level) indicates how long a component can be exposed to moisture before soldering. MSL 1 means unlimited shelf life; MSL 3 means 168 hours maximum. Higher MSL numbers require stricter moisture control during storage and handling. For standard applications, MSL 1 is preferred. MSL 3 parts require additional precautions.

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

A: Yes. Automotive-qualified parts meet stringent reliability and temperature requirements and are fully compatible with non-automotive applications. They represent enhanced quality and reliability.

Q: What is the significance of the supply voltage range difference between 2.5V and 1.8V minimum?

A: The 25LC020A-I/ST requires a minimum supply voltage of 2.5V. Substitute parts with 1.8V minimum support a wider range of power supply designs. However, if your circuit is designed for 2.5V operation, both types are compatible. The 1.8V minimum provides additional design flexibility for low-power applications.

Q: Can I use R1EX25002ATA00I#S0 as a substitute if my application requires 10 MHz operation?

A: No. The R1EX25002ATA00I#S0 operates at 5 MHz maximum clock frequency. This is insufficient for applications requiring 10 MHz SPI communication. Select a substitute part with 10 MHz or higher clock frequency capability.

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