24C02C-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24C02C-E/ST is a 2Kbit I2C EEPROM memory integrated circuit manufactured by Microchip Technology in an 8-TSSOP surface mount package. This non-volatile memory device operates at 100 kHz I2C clock frequency with a 3.5 µs access time and supports a supply voltage range of 4.5V to 5.5V across an operating temperature range of -40°C to 125°C. The part is actively produced and ROHS3 compliant with unlimited moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand enhanced performance specifications, or when alternative manufacturers' components offer superior electrical characteristics or extended operating conditions within the same functional category.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	100 kHz
Access Time	3.5 µs
Write Cycle Time	1.5 ms
Supply Voltage Range	4.5V ~ 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 24C02C-E/ST is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: I2C protocol
Package Type: 8-TSSOP surface mount configuration
Memory Format: EEPROM non-volatile technology

Performance Enhancement Parameters:

Clock Frequency: Substitute parts operate at 400 kHz or 1 MHz, exceeding the 100 kHz specification
Access Time: Substitute parts provide 450 ns to 900 ns access times, improving upon the 3.5 µs baseline
Write Cycle Time: Substitute parts range from 4 ms to 5 ms, compared to 1.5 ms original specification

Electrical Operating Range Parameters:

Supply Voltage: Substitute parts support extended voltage ranges from 1.6V to 5.5V, accommodating the original 4.5V to 5.5V requirement
Operating Temperature: Substitute parts maintain -40°C to 85°C or -40°C to 125°C ranges

Compliance and Status Parameters:

RoHS Status: All substitute parts maintain ROHS3 compliance
Product Status: Active or Not For New Designs designations
Automotive Grade: Select substitutes include AEC-Q100 qualification

Parameter Comparison

Parameter	24C02C-E/ST	BR24G02FVT-3GE2	BR34E02FVT-3E2	CAV24C02YE-GT3	M24C02-DRDW3TP/K	M24C02-FDW6TP	M24C02-WDW6TP	M34E02-FDW6TP
Manufacturer	Microchip Technology	Rohm Semiconductor	Rohm Semiconductor	onsemi	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Memory Size	2Kbit	2Kbit	2Kbit	2Kbit	2Kbit	2Kbit	2Kbit	2Kbit
Memory Organization	256 x 8	256 x 8	256 x 8	256 x 8	256 x 8	256 x 8	256 x 8	256 x 8
Memory Interface	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C
Clock Frequency	100 kHz	400 kHz	400 kHz	400 kHz	1 MHz	400 kHz	400 kHz	400 kHz
Access Time	3.5 µs	Not specified	Not specified	900 ns	450 ns	900 ns	900 ns	900 ns
Write Cycle Time	1.5 ms	5 ms	5 ms	5 ms	4 ms	5 ms	5 ms	5 ms
Supply Voltage Range	4.5V ~ 5.5V	1.6V ~ 5.5V	1.7V ~ 5.5V	2.5V ~ 5.5V	1.8V ~ 5.5V	1.7V ~ 5.5V	2.5V ~ 5.5V	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-TSSOP	8-TSSOP-B	8-TSSOP-B	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Not For New Designs	Active
Automotive Grade	Not specified	Not specified	Not specified	AEC-Q100	AEC-Q100	Not specified	Not specified	Not specified

Engineering Selection Recommendations

For Direct Replacement with Enhanced Performance:

The M24C02-FDW6TP (STMicroelectronics) and M34E02-FDW6TP (STMicroelectronics) provide direct functional substitution with improved I2C clock frequency (400 kHz) and faster access time (900 ns). Both parts maintain ROHS3 compliance and active product status. The M24C02-FDW6TP operates across -40°C to 85°C with supply voltage 1.7V to 5.5V, while M34E02-FDW6TP shares identical electrical specifications.

For Extended Temperature Range Applications:

The CAV24C02YE-GT3 (onsemi) and M24C02-DRDW3TP/K (STMicroelectronics) maintain the full -40°C to 125°C operating temperature range of the original part. Both include AEC-Q100 automotive qualification. The M24C02-DRDW3TP/K additionally provides the highest clock frequency (1 MHz) and fastest access time (450 ns) among all substitutes.

For Low-Voltage Applications:

The BR24G02FVT-3GE2 (Rohm Semiconductor) and BR34E02FVT-3E2 (Rohm Semiconductor) support the lowest supply voltage ranges (1.6V and 1.7V respectively), enabling operation in battery-powered or low-power systems. Both maintain active product status and ROHS3 compliance.

For Legacy System Compatibility:

The M24C02-WDW6TP (STMicroelectronics) carries "Not For New Designs" status but maintains the largest inventory (529,992 units) and verified DiGi-Electronics programmability. This part is suitable for sustaining production of existing designs only.

Frequently Asked Questions (FAQ)

Q: Can the 24C02C-E/ST be replaced with any 2Kbit I2C EEPROM in an 8-TSSOP package?

A: No. While memory size, organization, interface protocol, and package type are mandatory compatibility criteria, the substitute part must also support the original supply voltage range (4.5V to 5.5V) and operating temperature range (-40°C to 125°C) unless the application design is modified. Additionally, I2C clock frequency and access time specifications must be verified against system timing requirements.

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

A: Both package designations refer to 8-pin Thin Shrink Small Outline Package with identical physical dimensions (0.173" width, 4.40mm). The "-B" suffix indicates a variant designation from the manufacturer. Physical compatibility is maintained for PCB footprint purposes.

Q: Are all substitute parts backward compatible with the 24C02C-E/ST?

A: Yes, all listed substitute parts maintain backward compatibility at the functional level. They support the same I2C protocol, 2Kbit memory capacity, and 256 x 8 organization. However, enhanced specifications (higher clock frequency, faster access time) do not require system modification and operate transparently in applications designed for the original part.

Q: Which substitute part offers the best performance improvement?

A: The M24C02-DRDW3TP/K provides the highest performance with 1 MHz I2C clock frequency and 450 ns access time, compared to the original 100 kHz and 3.5 µs specifications. This part also maintains the full -40°C to 125°C temperature range and includes AEC-Q100 automotive qualification.

Q: Can I use a substitute part with a lower operating temperature maximum (85°C vs. 125°C)?

A: Substitution is valid only if the application's maximum operating temperature does not exceed 85°C. If the system requires operation up to 125°C, only the CAV24C02YE-GT3 or M24C02-DRDW3TP/K are suitable alternatives.

Q: What is the significance of AEC-Q100 qualification on substitute parts?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This certification is relevant only for automotive applications. Non-automotive applications do not require this qualification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, matching the environmental compliance status of the original 24C02C-E/ST.

Q: Which substitute part has the largest available inventory?

A: The M24C02-WDW6TP maintains the largest inventory at 529,992 units. However, this part carries "Not For New Designs" status and is recommended only for sustaining production of existing designs.

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