Equivalent & Substitute Parts for 24AA02T/SN

Part Overview

The 24AA02T/SN is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 900 ns access time. Housed in an 8-SOIC package, this non-volatile memory device operates across a supply voltage range of 1.7V to 5.5V and is rated for 0°C to 70°C operating temperature. The part is ROHS3 compliant and carries active product status with verified programmability through DiGi-Electronics.

Equivalent and substitute parts are necessary when the original 24AA02T/SN becomes unavailable, when extended temperature range operation is required, or when higher clock frequency performance is needed for specific application requirements.

Key Parameters

Parameter	Value
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	1.7V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24AA02T/SN is determined by the following critical parameters:

Core Compatibility Requirements:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: I2C protocol
Package / Case: 8-SOIC form factor
Mounting Type: Surface Mount
Supply Voltage Range: Must encompass or exceed 1.7V ~ 5.5V
RoHS Status: ROHS3 Compliant

Performance Considerations:

Clock Frequency: 400 kHz minimum (higher frequencies are acceptable)
Access Time: 900 ns or faster
Write Cycle Time: 5ms (standard across all candidates)
Operating Temperature: Extended range (-40°C ~ 85°C) provides broader application coverage

Substitute parts are grouped into two categories: direct equivalents maintaining 400 kHz operation and enhanced alternatives offering 1 MHz clock frequency with improved access time specifications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temperature	Package	Programmable Status
24AA02T/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	0°C ~ 70°C	8-SOIC	Verified
24AA024T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Verified
24AA025T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Not Verified
24AA02T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Verified
AT24CS02-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Not Verified
AT24HC02C-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Not Verified
AT34C02D-SSHM-T	Microchip Technology	2Kbit	1 MHz	Not Specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Verified
BR24G02FJ-3GTE2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Not Verified
BR24L02FJ-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Verified
BR24T02FJ-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Not Verified
M24C02-FMN6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Verified

Engineering Selection Recommendations

Direct Equivalents (400 kHz Operation):

24AA02T-I/SN is the primary substitute, offering identical electrical specifications to the original 24AA02T/SN with extended operating temperature range (-40°C ~ 85°C) and verified programmability status. This part provides the most direct replacement path with no functional compromise.

M24C02-FMN6TP from STMicroelectronics maintains full parameter compatibility including 400 kHz clock frequency, 900 ns access time, and verified programmability. This option is suitable when multi-source component strategy is required.

BR24L02FJ-WE2 from Rohm Semiconductor provides 400 kHz operation with verified programmability and extended temperature range. The minimum supply voltage of 1.8V represents a minor constraint compared to the original 1.7V specification.

Enhanced Performance Alternatives (1 MHz Operation):

AT34C02D-SSHM-T offers 1 MHz clock frequency with verified programmability and extended temperature range. This part is suitable for applications requiring higher I2C bus speeds while maintaining full 2Kbit capacity and 8-SOIC packaging.

AT24CS02-SSHM-T and AT24HC02C-SSHM-T provide 1 MHz operation with 550 ns access time. These parts carry unverified programmability status and should be evaluated for specific application requirements.

Secondary Alternatives:

24AA024T-I/SN and 24AA025T-I/SN from Microchip Technology maintain 400 kHz specifications with extended temperature range. The 24AA024T-I/SN carries verified programmability status, while 24AA025T-I/SN is unverified.

BR24G02FJ-3GTE2 and BR24T02FJ-WE2 from Rohm Semiconductor provide 400 kHz operation with unverified programmability status and extended temperature range.

All substitute candidates maintain ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 24AA02T/SN with a part rated for -40°C ~ 85°C operating temperature when my application only requires 0°C ~ 70°C?

A: Yes. Extended temperature range specifications are backward compatible with narrower temperature requirements. A part rated for -40°C ~ 85°C will function correctly within the 0°C ~ 70°C range.

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

A: Clock frequency determines the maximum I2C bus speed. A 400 kHz part operates at standard I2C speeds, while 1 MHz parts support faster bus communication. Both are compatible with systems designed for 400 kHz operation, as the faster part will operate at the lower bus speed when required.

Q: Are Rohm Semiconductor BR24 series parts fully compatible with Microchip 24AA02 designs?

A: BR24 series parts maintain identical memory capacity (2Kbit), I2C interface, 8-SOIC packaging, and 400 kHz operation. Voltage supply ranges differ slightly (1.6V or 1.8V minimum versus 1.7V), which may affect applications operating at the lower voltage boundary. Verify supply voltage compatibility for your specific design.

Q: What does "Programmable Status: Verified" mean?

A: Verified programmability indicates that DiGi-Electronics has confirmed the part's programming characteristics and compatibility. Unverified parts have not undergone this specific validation process but remain functionally equivalent based on manufacturer specifications.

Q: Can I use STMicroelectronics M24C02-FMN6TP as a direct replacement for the original 24AA02T/SN?

A: Yes. The M24C02-FMN6TP maintains identical electrical specifications (2Kbit, 400 kHz, 900 ns access time, 1.7V ~ 5.5V supply), 8-SOIC packaging, and verified programmability status. The extended operating temperature range (-40°C ~ 85°C) provides additional design flexibility.

Q: Are there supply voltage compatibility concerns when switching between substitute parts?

A: The original 24AA02T/SN specifies 1.7V ~ 5.5V supply range. Most substitutes maintain this range. BR24 series parts specify 1.6V or 1.8V minimum voltages. If your application operates below 1.8V, verify that the substitute part's minimum voltage specification meets your design requirements.

Q: What packaging considerations apply when selecting substitute parts?

A: All listed substitute parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging, maintaining identical PCB footprint compatibility with the original 24AA02T/SN. No layout modifications are required for mechanical substitution.

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