Equivalent & Substitute Parts for AT34C02N-10SC

Part Overview

The AT34C02N-10SC is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 8-SOIC surface mount packaging. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and production continuity. The functional specifications—2Kbit capacity, 256 x 8 memory organization, I2C protocol, and 4.5V to 5.5V supply voltage—define the baseline for compatible alternatives.

Key Parameters

Parameter	AT34C02N-10SC Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	10 ms
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

Core Functional Requirements:

Memory Size: 2Kbit (non-negotiable)
Memory Organization: 256 x 8 (non-negotiable)
Memory Interface: I2C (non-negotiable)
Clock Frequency: 400 kHz (primary specification)
Package / Case: 8-SOIC form factor (mechanical compatibility)
Mounting Type: Surface Mount (assembly compatibility)

Electrical Compatibility:

Voltage Supply Range: Must encompass or exceed 4.5V ~ 5.5V
Access Time: 900 ns or faster acceptable
Write Cycle Time: 10 ms or faster acceptable

Substitution Categories:

Direct Substitutes (Microchip Technology): Parts 24C02C/SN, 24C02CT/SN, 24C02C-I/SN, and 24C02CT-I/SN maintain identical memory specifications, I2C 400 kHz operation, and 8-SOIC packaging. These parts are active products with RoHS3 compliance, offering improved performance metrics and extended temperature ranges in certain variants.

Upgrade Substitutes (Microchip Technology): Parts 24C02C-E/SN and 24C02CT-E/SN operate at 100 kHz I2C frequency with extended temperature range (-40°C ~ 125°C). These are suitable where lower clock frequency is acceptable and wider temperature operation is beneficial.

Cross-Manufacturer Substitutes (Rohm Semiconductor): BR24G02F-3GTE2, BR24G02FJ-3GTE2, BR24L02FJ-WE2, and BR24T02FJ-WE2 provide 2Kbit I2C EEPROM functionality with 400 kHz operation. Package variations (8-SOP vs. 8-SOP-J) require mechanical verification. Supply voltage ranges vary (1.6V ~ 5.5V or 1.8V ~ 5.5V), providing broader operational flexibility.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Write Cycle Time	Voltage Supply	Operating Temperature	Package	Product Status	RoHS Status
AT34C02N-10SC	Microchip Technology	2Kbit	400 kHz	900 ns	10 ms	4.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Obsolete	Non-compliant
24C02C/SN	Microchip Technology	2Kbit	400 kHz	4.6 µs	1.5 ms	4.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active	RoHS3 Compliant
24C02CT/SN	Microchip Technology	2Kbit	400 kHz	4.6 µs	1.5 ms	4.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active	RoHS3 Compliant
24C02C-E/SN	Microchip Technology	2Kbit	100 kHz	4.6 µs	1.5 ms	4.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
24C02C-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1 ms	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
24C02CT-E/SN	Microchip Technology	2Kbit	100 kHz	4.6 µs	1.5 ms	4.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
24C02CT-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1 ms	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
BR24G02F-3GTE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	5 ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP	Active	RoHS3 Compliant
BR24G02FJ-3GTE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	5 ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
BR24L02FJ-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	5 ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
BR24T02FJ-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	5 ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

24C02CT-I/SN (Microchip Technology) is the optimal direct substitute. This part maintains identical I2C 400 kHz operation and 8-SOIC packaging as the AT34C02N-10SC. It achieves matching 900 ns access time and improves write cycle performance to 1 ms. The part is active with RoHS3 compliance and extended temperature range (-40°C ~ 85°C), providing superior reliability for new production. Tape & Reel packaging supports high-volume manufacturing.

Alternative for Extended Temperature Operation:

24C02CT-E/SN (Microchip Technology) operates at 100 kHz I2C frequency with extended temperature range (-40°C ~ 125°C). Select this variant where lower clock frequency is compatible with system requirements and wider temperature operation is required.

Cross-Manufacturer Option:

BR24G02FJ-3GTE2 (Rohm Semiconductor) provides 2Kbit I2C 400 kHz EEPROM in 8-SOIC packaging with active product status and RoHS3 compliance. This part supports broader supply voltage range (1.6V ~ 5.5V) and is suitable where multi-source qualification is required. Write cycle time of 5 ms is acceptable for non-time-critical applications.

Compliance Consideration:

All recommended substitutes carry RoHS3 compliance, addressing regulatory requirements absent in the obsolete AT34C02N-10SC. This compliance status is mandatory for new product designs and manufacturing.

Frequently Asked Questions (FAQ)

Q: Can 24C02C/SN be used as a direct replacement for AT34C02N-10SC?

A: Yes. Both parts maintain 2Kbit capacity, I2C 400 kHz operation, and 8-SOIC packaging. The 24C02C/SN improves access time to 4.6 µs and write cycle time to 1.5 ms. Operating temperature range is identical (0°C ~ 70°C). The 24C02C/SN is active with RoHS3 compliance.

Q: What is the difference between 24C02CT/SN and 24C02C/SN?

A: Both parts are functionally identical in electrical specifications. The primary difference is packaging format: 24C02CT/SN is supplied in Cut Tape & Digi-Reel format suitable for automated assembly, while 24C02C/SN is supplied in Tube packaging. Select based on manufacturing process requirements.

Q: Can I use 24C02C-E/SN if my system operates at 400 kHz?

A: No. The 24C02C-E/SN operates at 100 kHz I2C frequency. Using this part in a 400 kHz system will result in communication failure. Select 24C02C-I/SN or 24C02CT-I/SN for 400 kHz operation.

Q: Are Rohm Semiconductor parts (BR24G02FJ-3GTE2, BR24L02FJ-WE2, BR24T02FJ-WE2) pin-compatible with Microchip parts?

A: All listed parts maintain 8-pin SOIC package configuration with I2C interface. Pin compatibility is confirmed for I2C protocol operation. However, verify specific pinout documentation for your application before substitution.

Q: What is the advantage of BR24G02FJ-3GTE2 over Microchip alternatives?

A: BR24G02FJ-3GTE2 supports lower supply voltage operation (1.6V minimum vs. 4.5V minimum for Microchip parts), enabling use in low-power applications. All parts maintain 400 kHz I2C operation and RoHS3 compliance. Write cycle time is 5 ms compared to 1 ms for Microchip 24C02C-I/SN.

Q: Is the AT34C02N-10SC still available for purchase?

A: The AT34C02N-10SC is classified as obsolete. Active substitutes with superior specifications and compliance certifications are available. Transition to 24C02CT-I/SN or equivalent alternatives for new designs.

Q: Do all substitute parts meet RoHS3 requirements?

A: Yes. All recommended substitute parts carry RoHS3 compliance certification. The original AT34C02N-10SC is RoHS non-compliant, making compliance upgrade a key benefit of substitution.

Q: Can I mix Microchip and Rohm parts in the same production batch?

A: Yes, provided electrical specifications and I2C protocol compatibility are verified for your application. Both manufacturers' parts maintain 2Kbit capacity, 256 x 8 organization, and I2C 400 kHz operation. Conduct functional testing to confirm interchangeability in your specific circuit.

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