24LC02B-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC02B-E/ST is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology, housed in an 8-TSSOP surface mount package. This non-volatile memory device operates at 400 kHz I2C clock frequency with 900 ns access time and supports a supply voltage range of 2.5V to 5.5V across an operating temperature range of -40°C to 125°C. The device is ROHS3 compliant and currently in active product status with 2300 units in stock. Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory management, or design flexibility while maintaining functional compatibility.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
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

Substitution compatibility for the 24LC02B-E/ST is determined by the following critical parameters:

Memory Capacity & Organization: All substitutes must provide 2Kbit capacity with 256 x 8 organization to ensure data storage compatibility
Interface Protocol: I2C interface is mandatory for bus-level compatibility
Package & Pinout: 8-TSSOP package with identical pinout ensures mechanical and electrical interchangeability
Voltage Supply Range: Substitute parts must support the application's supply voltage; parts with wider ranges (1.6V–5.5V or 1.7V–5.5V) are compatible with 2.5V–5.5V applications
Operating Temperature Range: Substitutes operating across -40°C to 125°C are directly compatible; parts rated to -40°C to 85°C are compatible for applications not exceeding 85°C
Clock Frequency: 400 kHz is the standard; parts supporting 1 MHz are backward compatible
Access Time & Write Cycle: Faster specifications (450 ns access, 4ms write) are compatible with 900 ns / 5ms requirements
Compliance & Certification: ROHS3 compliance and AEC-Q100 automotive qualification are preserved across substitutes

Parameter Comparison

Manufacturer Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Write Cycle	Voltage Supply	Operating Temperature	Package	Product Status
24LC02B-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
BR24G02FVT-3GE2	Rohm Semiconductor	2Kbit	400 kHz	—	5ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
BR34E02FVT-3E2	Rohm Semiconductor	2Kbit	400 kHz	—	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
CAV24C02YE-GT3	onsemi	2Kbit	400 kHz	900 ns	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
M24C02-DRDW3TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	4ms	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
M24C02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
M24C02-WDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	5ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not For New Designs
M34E02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
R1EX24002ATAS0I#S0	Renesas Electronics Corporation	2Kbit	400 kHz	900 ns	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
R1EX24002ATAS0I#U0	Renesas Electronics Corporation	2Kbit	400 kHz	900 ns	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications)

CAV24C02YE-GT3 (onsemi) is the closest functional equivalent, matching all electrical parameters including 2.5V–5.5V supply range, -40°C to 125°C operating temperature, 900 ns access time, and 8-TSSOP package. This part carries AEC-Q100 automotive qualification, making it suitable for automotive and industrial applications requiring extended temperature range operation.

Active Production Alternatives

M24C02-FDW6TP and M34E02-FDW6TP (STMicroelectronics) are active production parts with identical I2C interface, memory capacity, and package. Both support 1.7V–5.5V supply range and -40°C to 85°C operation. M24C02-FDW6TP is verified programmable by DiGi-Electronics. These parts are suitable for applications operating within -40°C to 85°C temperature limits.

M24C02-DRDW3TP/K (STMicroelectronics) offers enhanced performance with 1 MHz clock frequency and 450 ns access time, providing backward compatibility with 400 kHz I2C bus operation. This part maintains -40°C to 125°C temperature range and AEC-Q100 qualification, suitable for high-speed I2C applications requiring automotive-grade reliability.

R1EX24002ATAS0I#S0 and R1EX24002ATAS0I#U0 (Renesas Electronics Corporation) are active production alternatives with 1.8V–5.5V supply range and -40°C to 85°C operation. Both support standard 400 kHz I2C operation and 8-TSSOP packaging.

BR24G02FVT-3GE2 and BR34E02FVT-3E2 (Rohm Semiconductor) are active alternatives with extended low-voltage support (1.6V and 1.7V minimum respectively) and -40°C to 85°C operation. These parts are suitable for low-power applications with reduced temperature range requirements.

Legacy Status

M24C02-WDW6TP (STMicroelectronics) is marked "Not For New Designs" and should not be selected for new development despite high inventory availability (529,992 units). This part remains available for legacy system support and maintenance applications only.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 24LC02B-E/ST with any of these parts in my existing design?

A: Substitution depends on your application's operating temperature range. For applications operating across the full -40°C to 125°C range, use CAV24C02YE-GT3 or M24C02-DRDW3TP/K. For applications limited to -40°C to 85°C, all other listed parts are compatible. Verify your supply voltage requirements; parts with lower minimum voltage ratings (1.6V–1.8V) are compatible with 2.5V–5.5V applications.

Q: What is the difference between 8-TSSOP and 8-TSSOP-B packages?

A: Both packages are mechanically and electrically compatible 8-pin thin shrink small outline packages with 0.173" width and 4.40mm body width. The "-B" designation indicates a variant from Rohm Semiconductor. Pinout compatibility is maintained across both variants for I2C EEPROM applications.

Q: Are automotive-qualified parts required for my application?

A: Automotive qualification (AEC-Q100) is required only for automotive and safety-critical applications. CAV24C02YE-GT3 and M24C02-DRDW3TP/K carry AEC-Q100 qualification. Standard industrial applications do not require this certification.

Q: Can I use parts rated for -40°C to 85°C in applications requiring -40°C to 125°C operation?

A: No. Parts rated to -40°C to 85°C are not suitable for applications exceeding 85°C. Use CAV24C02YE-GT3 or M24C02-DRDW3TP/K for full -40°C to 125°C temperature range support.

Q: What is the advantage of M24C02-DRDW3TP/K over the standard 400 kHz alternatives?

A: M24C02-DRDW3TP/K supports 1 MHz I2C clock frequency with 450 ns access time and 4ms write cycle, providing faster data transfer compared to 400 kHz parts. It remains backward compatible with 400 kHz I2C buses and maintains -40°C to 125°C operation with AEC-Q100 qualification.

Q: Why is M24C02-WDW6TP marked "Not For New Designs"?

A: M24C02-WDW6TP is in legacy status, indicating the manufacturer recommends against using this part in new product designs. Select active production alternatives such as M24C02-FDW6TP or M34E02-FDW6TP for new development.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental and regulatory requirements of the 24LC02B-E/ST.

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