Equivalent & Substitute Parts for 34AA02T-I/ST

Part Overview

The 34AA02T-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 based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional compatibility in circuit applications.

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
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on substitution relationship type and parameter alignment:

MFR Recommended Substitutes maintain identical memory specifications (2Kbit, 256 x 8, I2C interface) with variations in clock frequency (1 MHz vs 400 kHz), access time (550 ns vs 900 ns), or operating temperature range (-40°C ~ 125°C vs -40°C ~ 85°C). These parts are functionally compatible as higher clock frequencies and faster access times are backward compatible with 400 kHz I2C applications. Parts include 34AA02T-E/ST, AT24CS02-XHM-T, AT24HC02C-XHM-T, and AT34C02D-XHM-T.

Parametric Equivalents match all critical electrical and mechanical parameters including memory capacity, interface type, clock frequency, access time, voltage range, and package configuration. These parts are direct functional replacements. Parts include 24AA024T-I/ST and 24AA02T-I/ST.

Direct Manufacturer Equivalents from alternative manufacturers (STMicroelectronics and Rohm Semiconductor) provide identical electrical specifications and package compatibility. Parts include M34E02-FDW6TP, BR24G02FVT-3AGE2, BR24G02FVT-3GE2, and BR34E02FVT-3E2.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Operating Temp	Voltage Supply	Package	Product Status
34AA02T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	1.7V ~ 5.5V	8-TSSOP	Active
34AA02T-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 125°C	1.7V ~ 5.5V	8-TSSOP	Active
AT24CS02-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	-40°C ~ 85°C	1.7V ~ 5.5V	8-TSSOP	Active
AT24HC02C-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	-40°C ~ 85°C	1.7V ~ 5.5V	8-TSSOP	Active
AT34C02D-XHM-T	Microchip Technology	2Kbit	1 MHz	Not Specified	-40°C ~ 85°C	1.7V ~ 5.5V	8-TSSOP	Active
24AA024T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	1.7V ~ 5.5V	8-TSSOP	Active
24AA02T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	1.7V ~ 5.5V	8-TSSOP	Active
M34E02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	1.7V ~ 5.5V	8-TSSOP	Active
BR24G02FVT-3AGE2	Rohm Semiconductor	2Kbit	1 MHz	Not Specified	-40°C ~ 85°C	1.6V ~ 5.5V	8-TSSOP-B	Active
BR24G02FVT-3GE2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	-40°C ~ 85°C	1.6V ~ 5.5V	8-TSSOP-B	Active
BR34E02FVT-3E2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	-40°C ~ 85°C	1.7V ~ 5.5V	8-TSSOP-B	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original 34AA02T-I/ST component. Selection between substitutes depends on application-specific requirements:

For applications requiring identical electrical performance and backward compatibility, 24AA02T-I/ST and 24AA024T-I/ST from Microchip Technology provide parametric equivalence with verified programmability status.

For applications tolerating higher clock frequencies and faster access times, AT24CS02-XHM-T and AT24HC02C-XHM-T offer 1 MHz operation with 550 ns access time while maintaining the same voltage supply range and operating temperature.

For extended temperature operation to 125°C, 34AA02T-E/ST provides identical electrical specifications with expanded thermal range.

For alternative manufacturer sourcing, M34E02-FDW6TP from STMicroelectronics provides direct electrical equivalence. Rohm Semiconductor parts (BR24G02FVT-3AGE2, BR24G02FVT-3GE2, BR34E02FVT-3E2) offer 8-TSSOP-B package variant with voltage supply range starting at 1.6V.

Frequently Asked Questions (FAQ)

Q: Can AT24CS02-XHM-T replace 34AA02T-I/ST in a 400 kHz I2C application?

A: Yes. AT24CS02-XHM-T operates at 1 MHz clock frequency, which is backward compatible with 400 kHz I2C bus specifications. The faster access time (550 ns vs 900 ns) and higher clock frequency do not create incompatibility in applications designed for 400 kHz operation.

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

A: Both packages are mechanically and electrically compatible 8-pin thin shrink small outline packages with 0.173" width and 4.40mm body width. The -B designation indicates a variant from Rohm Semiconductor. Pin configuration and footprint remain compatible for PCB assembly.

Q: Is 34AA02T-E/ST suitable for applications requiring -40°C ~ 85°C operation?

A: Yes. 34AA02T-E/ST operates across -40°C ~ 125°C, which encompasses the -40°C ~ 85°C range. The extended upper temperature limit provides additional thermal margin without affecting performance in standard temperature applications.

Q: Can M34E02-FDW6TP from STMicroelectronics be used as a direct replacement?

A: Yes. M34E02-FDW6TP provides identical electrical specifications including 2Kbit capacity, 400 kHz I2C interface, 900 ns access time, 1.7V ~ 5.5V supply range, and 8-TSSOP package configuration. It is functionally equivalent for direct substitution.

Q: What voltage supply range compatibility exists between substitutes?

A: The original 34AA02T-I/ST operates at 1.7V ~ 5.5V. Most substitutes maintain this range. Rohm Semiconductor parts (BR24G02FVT series) operate at 1.6V ~ 5.5V, providing lower minimum voltage operation. All substitutes are compatible with standard 3.3V and 5V supply applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, ensuring regulatory alignment with the original component for applications requiring RoHS certification.

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