24LC02BT-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC02BT-E/ST is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology, packaged in 8-TSSOP surface mount configuration. This non-volatile memory device operates at 400 kHz I2C clock frequency with 900 ns access time and supports supply voltages from 2.5V to 5.5V across an operating temperature range of -40°C to 125°C. The part is currently active and ROHS3 compliant. Equivalent and substitute parts are identified based on matching core electrical specifications and mechanical compatibility within the 2Kbit I2C EEPROM category.

Key Parameters

Parameter	24LC02BT-E/ST
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

Substitute parts for the 24LC02BT-E/ST are grouped based on the following core electrical and mechanical parameters that determine functional compatibility:

Primary Matching Criteria:

Memory Size: 2Kbit
Memory Organization: 256 x 8
Memory Interface: I2C
Package Type: 8-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount
Memory Format: EEPROM
RoHS Status: ROHS3 Compliant

Secondary Compatibility Parameters:

Clock Frequency: 400 kHz (primary specification)
Access Time: 900 ns (primary specification)
Write Cycle Time: 5ms (primary specification)
Voltage Supply Range: Minimum 2.5V to 5.5V maximum
Operating Temperature Range: -40°C to 125°C minimum

Substitutes are classified as direct equivalents when all primary parameters match and secondary parameters meet or exceed the original specification. Parts with extended voltage ranges (lower minimum voltage) or higher clock frequencies remain compatible as they support the original operating conditions.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temperature	Package	Product Status
24LC02BT-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
34AA02T-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
BR24G02FVT-3GE2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
BR34E02FVT-3E2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
M24C02-DRDW3TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
M24C02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
M24C02-WDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not For New Designs
M34E02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
R1EX24002ATAS0I#U0	Renesas Electronics Corporation	2Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
CAV24C02YE-GT3	onsemi	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications): The 34AA02T-E/ST from Microchip Technology and CAV24C02YE-GT3 from onsemi provide direct functional equivalence to the 24LC02BT-E/ST. Both maintain the 2Kbit capacity, 256 x 8 organization, 400 kHz I2C interface, 900 ns access time, and 8-TSSOP package. The 34AA02T-E/ST extends the minimum supply voltage to 1.7V and maintains the full -40°C to 125°C temperature range. The CAV24C02YE-GT3 maintains identical voltage and temperature specifications and includes AEC-Q100 automotive qualification.

Compatible Alternatives with Extended Performance: The M24C02-DRDW3TP/K from STMicroelectronics offers enhanced clock frequency (1 MHz) and faster access time (450 ns) while maintaining the full -40°C to 125°C operating temperature range and 8-TSSOP package. This part is AEC-Q100 qualified for automotive applications. The extended performance parameters are backward compatible with systems designed for the original 400 kHz specification.

Compatible Alternatives with Temperature Derating: The M24C02-FDW6TP, M34E02-FDW6TP, and R1EX24002ATAS0I#U0 provide functional compatibility with matching 2Kbit capacity, 400 kHz clock frequency, 900 ns access time, and 8-TSSOP package. These parts operate across -40°C to 85°C, representing a 40°C reduction in maximum operating temperature compared to the original specification. All three parts support extended minimum supply voltages (1.7V to 1.8V minimum).

Not Recommended for New Designs: The M24C02-WDW6TP is marked as "Not For New Designs" and should not be selected for new applications despite matching electrical specifications.

Rohm Semiconductor Alternatives: The BR24G02FVT-3GE2 and BR34E02FVT-3E2 from Rohm Semiconductor provide 2Kbit I2C EEPROM functionality in 8-TSSOP-B package configuration with 400 kHz clock frequency. These parts operate across -40°C to 85°C with extended minimum supply voltages (1.6V to 1.7V). The 8-TSSOP-B package variant maintains mechanical compatibility with standard 8-TSSOP footprints.

Frequently Asked Questions (FAQ)

Q: Can the 34AA02T-E/ST replace the 24LC02BT-E/ST in all applications?

A: Yes. The 34AA02T-E/ST maintains identical memory capacity (2Kbit), organization (256 x 8), I2C interface (400 kHz), access time (900 ns), and 8-TSSOP package. The extended minimum supply voltage (1.7V vs 2.5V) and identical operating temperature range (-40°C to 125°C) make it a direct functional equivalent.

Q: What is the difference between the M24C02-FDW6TP and M24C02-WDW6TP?

A: Both parts share identical electrical specifications (2Kbit, 400 kHz, 900 ns access time, 8-TSSOP package). The M24C02-WDW6TP is marked "Not For New Designs" and should not be selected for new applications. The M24C02-FDW6TP is the active alternative from STMicroelectronics.

Q: Why do some substitutes have lower maximum operating temperatures (-40°C to 85°C vs -40°C to 125°C)?

A: Operating temperature range is a specified parameter that reflects the manufacturer's qualification and testing. Parts with -40°C to 85°C ratings are suitable for applications within this range. Applications requiring operation above 85°C must use parts qualified to 125°C, such as the 34AA02T-E/ST or CAV24C02YE-GT3.

Q: Is the 8-TSSOP-B package compatible with 8-TSSOP footprints?

A: The 8-TSSOP-B variant from Rohm Semiconductor maintains the same 0.173" width and 4.40mm body dimensions as standard 8-TSSOP packages. Mechanical compatibility is maintained for PCB footprint placement.

Q: Can the M24C02-DRDW3TP/K with 1 MHz clock frequency be used in place of the 24LC02BT-E/ST?

A: Yes. The M24C02-DRDW3TP/K is backward compatible with systems designed for 400 kHz operation. The enhanced 1 MHz clock frequency and 450 ns access time exceed the original specifications. This part maintains the full -40°C to 125°C operating temperature range and includes AEC-Q100 automotive qualification.

Q: What does "DiGi-Electronics Programmable: Verified" indicate?

A: This designation indicates that the part has been verified for programming compatibility within the DiGi-Electronics supply chain. Parts marked "Not Verified" have not undergone this specific verification process but maintain full functional compatibility based on manufacturer specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the compliance status of the original 24LC02BT-E/ST.

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