Equivalent & Substitute Parts for 24AA025T-I/ST

Part Overview

The 24AA025T-I/ST is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 900 ns access time in an 8-TSSOP surface mount package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified to address inventory availability, extended temperature range requirements, or enhanced performance specifications while maintaining functional compatibility within the same memory category and package form factor.

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	-40°C ~ 85°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped into three categories based on allowed electrical and mechanical parameters:

MFR Recommended Substitutes (Microchip Technology): Parts 34AA02T-E/ST, AT24CS02-XHM-T, AT24HC02C-XHM-T, and AT34C02D-XHM-T maintain the same 2Kbit memory size, 256 x 8 organization, I2C interface, 8-TSSOP package, and supply voltage range. These parts differ in clock frequency (1 MHz vs. 400 kHz) and access time (550 ns vs. 900 ns), providing enhanced performance. Operating temperature ranges vary: 34AA02T-E/ST extends to 125°C, while others remain at 85°C maximum. All are ROHS3 compliant with MSL rating of 1, except AT34C02D-XHM-T which has MSL rating of 3.

Parametric Equivalents (Microchip Technology): Parts 24AA024T-I/ST and 24AA02T-I/ST are direct parametric matches with identical electrical specifications: 400 kHz clock frequency, 900 ns access time, 5ms write cycle time, and -40°C ~ 85°C operating temperature. Both maintain 1.7V ~ 5.5V supply voltage and 8-TSSOP package configuration. These parts are verified as DiGi-Electronics programmable.

MFR Recommended Substitutes (Rohm Semiconductor): Parts BR24G02FVT-3AGE2, BR24G02FVT-3GE2, BR24L02FVT-WE2, and BR34E02FVT-3E2 provide alternative sourcing from Rohm Semiconductor. All maintain 2Kbit memory size, 256 x 8 organization, I2C interface, and 8-TSSOP-B package. Clock frequencies range from 400 kHz to 1 MHz. Supply voltage ranges vary: BR24G02FVT-3AGE2 and BR24G02FVT-3GE2 support 1.6V ~ 5.5V, BR24L02FVT-WE2 supports 1.8V ~ 5.5V, and BR34E02FVT-3E2 supports 1.7V ~ 5.5V. All are ROHS3 compliant with MSL rating of 1.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Supply Voltage	Operating Temperature	Package	MSL
24AA025T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	1
34AA02T-E/ST	Microchip	2Kbit	1 MHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	1
AT24CS02-XHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	1
AT24HC02C-XHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	1
AT34C02D-XHM-T	Microchip	2Kbit	1 MHz	Not Specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	3
24AA024T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	1
24AA02T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	1
BR24G02FVT-3AGE2	Rohm	2Kbit	1 MHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	1
BR24G02FVT-3GE2	Rohm	2Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	1
BR24L02FVT-WE2	Rohm	2Kbit	400 kHz	Not Specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	1
BR34E02FVT-3E2	Rohm	2Kbit	400 kHz	Not Specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	1

Engineering Selection Recommendations

Selection of substitute parts must be based on compliance status and product availability. All listed substitutes maintain ROHS3 compliance and are classified as Active product status, ensuring regulatory alignment with the original 24AA025T-I/ST component.

For applications requiring extended operating temperature range to 125°C, the 34AA02T-E/ST from Microchip Technology is the appropriate selection, as it extends the maximum temperature specification while maintaining all other electrical parameters within acceptable tolerance.

For applications requiring enhanced I2C clock frequency performance at 1 MHz with reduced access time to 550 ns, the AT24CS02-XHM-T or AT24HC02C-XHM-T are suitable selections. Both maintain the standard -40°C ~ 85°C operating temperature range and 1.7V ~ 5.5V supply voltage specification.

Parametric equivalents 24AA024T-I/ST and 24AA02T-I/ST provide direct functional replacement with identical electrical specifications and verified DiGi-Electronics programmability status.

Rohm Semiconductor alternatives (BR24G02FVT-3AGE2, BR24G02FVT-3GE2, BR24L02FVT-WE2, BR34E02FVT-3E2) are suitable for applications where alternative sourcing is required. BR24G02FVT-3GE2 and BR34E02FVT-3E2 match the 400 kHz clock frequency of the original part. BR24L02FVT-WE2 requires minimum supply voltage of 1.8V, which may restrict use in applications requiring operation below this threshold.

Frequently Asked Questions (FAQ)

Q: Can 34AA02T-E/ST be used as a direct replacement for 24AA025T-I/ST?

A: Yes, 34AA02T-E/ST is a manufacturer-recommended substitute. It maintains identical memory capacity (2Kbit), organization (256 x 8), I2C interface, package type (8-TSSOP), and supply voltage range (1.7V ~ 5.5V). The primary differences are enhanced clock frequency (1 MHz vs. 400 kHz) and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). These enhancements are backward compatible with applications designed for the original part.

Q: What is the difference between Microchip and Rohm substitute options?

A: Microchip substitutes (34AA02T-E/ST, AT24CS02-XHM-T, AT24HC02C-XHM-T, AT34C02D-XHM-T) maintain identical 8-TSSOP package specifications and are sourced from the original manufacturer. Rohm substitutes (BR24G02FVT-3AGE2, BR24G02FVT-3GE2, BR24L02FVT-WE2, BR34E02FVT-3E2) use 8-TSSOP-B package variant and provide alternative sourcing. Both groups maintain 2Kbit memory capacity and I2C interface compatibility.

Q: Are parametric equivalents 24AA024T-I/ST and 24AA02T-I/ST fully compatible with 24AA025T-I/ST?

A: Yes, both 24AA024T-I/ST and 24AA02T-I/ST are parametric equivalents with identical electrical specifications: 400 kHz clock frequency, 900 ns access time, 5ms write cycle time, 1.7V ~ 5.5V supply voltage, and -40°C ~ 85°C operating temperature. Both are verified as DiGi-Electronics programmable and maintain ROHS3 compliance and MSL rating of 1.

Q: Which substitute part should be selected for low-voltage applications below 1.8V?

A: BR24L02FVT-WE2 specifies minimum supply voltage of 1.8V and is not suitable for applications requiring operation below this threshold. For applications requiring operation at 1.7V minimum, select from 24AA025T-I/ST, 34AA02T-E/ST, AT24CS02-XHM-T, AT24HC02C-XHM-T, AT34C02D-XHM-T, 24AA024T-I/ST, 24AA02T-I/ST, or BR34E02FVT-3E2, all of which specify 1.7V minimum supply voltage.

Q: What is the significance of MSL rating differences between substitute parts?

A: Moisture Sensitivity Level (MSL) rating indicates the maximum time a component can be exposed to ambient conditions of 30°C and 85% relative humidity before soldering. The original 24AA025T-I/ST and most substitutes carry MSL rating of 1 (Unlimited), indicating no time restriction. AT34C02D-XHM-T carries MSL rating of 3 (168 Hours), requiring component storage in dry conditions and limiting shelf life after packaging opening.

Q: Can AT24CS02-XHM-T and AT24HC02C-XHM-T be used interchangeably?

A: Yes, both parts are functionally equivalent with identical specifications: 2Kbit memory, 1 MHz clock frequency, 550 ns access time, 1.7V ~ 5.5V supply voltage, -40°C ~ 85°C operating temperature, 8-TSSOP package, and MSL rating of 1. Both are ROHS3 compliant and Active product status.

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