Equivalent & Substitute Parts for 34LC02-E/ST

Part Overview

The 34LC02-E/ST is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 400 ns access time. This non-volatile memory device is housed in an 8-TSSOP surface mount package and operates across a wide supply voltage range of 2.2V to 5.5V with an extended temperature range of -40°C to 125°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package form factor, and electrical operating parameters to ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	400 ns
Write Cycle Time	5ms
Voltage Supply Range	2.2V ~ 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 34LC02-E/ST is determined by the following critical parameters:

Primary Matching Criteria:

Memory capacity: 2Kbit with 256 x 8 organization
Interface protocol: I2C serial communication
Package form factor: 8-TSSOP surface mount configuration
Pin compatibility: Identical pinout for direct PCB replacement

Secondary Compatibility Factors:

Supply voltage range must encompass or overlap with 2.2V ~ 5.5V
Operating temperature range must support -40°C minimum and 125°C maximum
Clock frequency and access time specifications determine performance equivalence
Write cycle time of 5ms is standard across all identified substitutes

Substitute parts are grouped into two categories: direct equivalents operating at 1 MHz clock frequency with matching access time specifications, and functional equivalents operating at reduced 400 kHz clock frequency with longer access times but maintaining full I2C protocol compatibility and identical memory organization.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temperature	Package	Product Status
34LC02-E/ST	Microchip Technology	2Kbit	1 MHz	400 ns	2.2V ~ 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
BR24L02FVT-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.8V ~ 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-DRDW8TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	Active
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

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, ensuring long-term availability and environmental regulatory conformance equivalent to the 34LC02-E/ST.

Direct Performance Equivalents (1 MHz Operation): The M24C02-DRDW3TP/K and M24C02-DRDW8TP/K from STMicroelectronics operate at 1 MHz clock frequency matching the primary part specification. Both devices support the full -40°C to 125°C temperature range required by the 34LC02-E/ST, with M24C02-DRDW3TP/K providing extended temperature coverage to 125°C. These parts carry AEC-Q100 automotive qualification, providing additional reliability assurance for demanding applications. The 450 ns access time represents a marginal 50 ns increase from the 34LC02-E/ST specification, maintaining functional equivalence for standard I2C timing requirements.

Functional Equivalents (400 kHz Operation): The BR24G02FVT-3GE2, BR24L02FVT-WE2, BR34E02FVT-3E2 from Rohm Semiconductor, M34E02-FDW6TP from STMicroelectronics, and R1EX24002ATAS0I#U0 from Renesas Electronics operate at reduced 400 kHz clock frequency. These parts are suitable for applications where lower I2C bus speed is acceptable. The Rohm devices operate to -40°C to 85°C, while the STMicroelectronics M34E02-FDW6TP and Renesas R1EX24002ATAS0I#U0 maintain identical temperature specifications. The M34E02-FDW6TP carries DiGi-Electronics Programmable verification status, confirming production readiness.

Supply Voltage Considerations: The 34LC02-E/ST minimum supply voltage of 2.2V is the highest among all listed parts. Applications requiring operation below 2.2V must select substitute parts with lower minimum voltage specifications. The M24C02 series supports 1.8V minimum, while Rohm BR24G02FVT-3GE2 supports 1.6V minimum operation.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the 34LC02-E/ST with any of the listed substitute parts?

A: Direct PCB replacement is possible only with parts maintaining identical 8-TSSOP pinout and I2C protocol. The M24C02-DRDW3TP/K and M24C02-DRDW8TP/K provide pin-for-pin compatibility with matching 1 MHz operation. Rohm BR-series and other 400 kHz devices are functionally compatible but operate at reduced clock frequency, requiring verification that your application I2C bus speed can accommodate 400 kHz operation.

Q: What is the difference between 1 MHz and 400 kHz clock frequency operation?

A: Clock frequency determines the maximum I2C bus speed supported by the device. The 34LC02-E/ST supports I2C Fast mode at 1 MHz, while 400 kHz devices operate at I2C Standard mode. If your circuit design requires Fast mode I2C communication, select M24C02-DRDW3TP/K or M24C02-DRDW8TP/K. If your I2C bus operates at Standard mode (400 kHz or lower), all listed substitutes are compatible.

Q: Are there temperature range limitations I should consider?

A: The 34LC02-E/ST operates to 125°C maximum. The M24C02-DRDW3TP/K maintains this specification, while M24C02-DRDW8TP/K operates to 105°C maximum. All Rohm and Renesas substitutes operate to 85°C maximum. For applications requiring 125°C operation, select M24C02-DRDW3TP/K or remain with the 34LC02-E/ST.

Q: What is the significance of the 8-TSSOP versus 8-TSSOP-B package designation?

A: Both designations refer to 8-pin Thin Shrink Small Outline Package with identical 0.173" width and 4.40mm body dimensions. The -B suffix indicates a variant designation from Rohm Semiconductor but maintains mechanical and electrical compatibility for PCB footprint purposes.

Q: Can I use a substitute part with lower minimum supply voltage in a 2.2V application?

A: Yes. Parts with lower minimum voltage specifications (such as M24C02 series at 1.8V minimum) are compatible with 2.2V supply applications. The lower minimum voltage specification indicates broader operating range compatibility. Verify that your specific application does not require the extended 2.2V to 5.5V range of the 34LC02-E/ST before substitution.

Q: What does AEC-Q100 qualification mean for the M24C02 series?

A: AEC-Q100 is an automotive industry qualification standard indicating the device has undergone rigorous reliability testing for automotive applications. This qualification provides additional assurance of product reliability and long-term availability, particularly valuable for mission-critical or automotive-grade applications.

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