34AA02-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 34AA02-E/ST is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology in 8-TSSOP surface mount packaging. This non-volatile memory device operates at 400 kHz I2C clock frequency with 900 ns access time and supports a supply voltage range of 1.7V to 5.5V across an operating temperature range of -40°C to 125°C. The part is ROHS3 compliant and currently in active production status with 658 units in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for production efficiency, or when design specifications allow for compatible alternatives from different manufacturers that meet identical electrical and mechanical parameters.

Key Parameters

Parameter	Specification
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Supply Voltage	1.7V ~ 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

Substitute parts for the 34AA02-E/ST are classified based on strict electrical and mechanical compatibility. The substitution logic is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: I2C protocol
Package Type: 8-TSSOP form factor
Supply Voltage Range: Minimum 1.7V support required
Operating Temperature Range: Minimum -40°C to 85°C required

Secondary Compatibility Criteria:

Clock Frequency: 400 kHz or higher
Access Time: 900 ns or faster
Write Cycle Time: 5ms or faster
RoHS3 Compliance
Moisture Sensitivity Level: MSL 1 (Unlimited)

Substitute parts are grouped into two categories: direct manufacturer alternatives from Microchip Technology with identical electrical specifications but different packaging formats, and cross-manufacturer equivalents from Rohm Semiconductor, onsemi, STMicroelectronics, and Renesas Electronics Corporation that meet or exceed all electrical parameters within the 8-TSSOP package constraint.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Supply Voltage	Operating Temp	Package	Inventory
34AA02-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	658 Pcs
34AA02T-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	2040 Pcs
BR24G02FVT-3GE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	3225 Pcs
CAT34C02YI-GT5A	onsemi	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	21561 Pcs
M24C02-DRDW3TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	2628 Pcs
M24C02-DRDW8TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	6379 Pcs
M24C02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	17178 Pcs
M34E02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	41228 Pcs
R1EX24002ATAS0I#U0	Renesas Electronics	2Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	3700 Pcs

Engineering Selection Recommendations

Direct Microchip Equivalent: The 34AA02T-E/ST is the direct equivalent from Microchip Technology, differing only in packaging format (Tape & Reel versus Tube). This part maintains identical electrical specifications and operating parameters. Selection is appropriate when tape and reel packaging is preferred for automated assembly processes.

STMicroelectronics M24C02 Series: The M24C02-FDW6TP and M34E02-FDW6TP are functionally equivalent at 400 kHz I2C operation with 900 ns access time. Both are ROHS3 compliant and support the required supply voltage range. The M34E02-FDW6TP carries verified DiGi-Electronics programmable status and offers the highest inventory availability (41228 units). Operating temperature is limited to -40°C to 85°C, which is acceptable for applications not requiring the full 125°C upper limit of the primary part.

The M24C02-DRDW3TP/K and M24C02-DRDW8TP/K operate at 1 MHz I2C frequency with 450 ns access time, providing performance enhancement. The M24C02-DRDW3TP/K supports -40°C to 125°C operation matching the primary part's temperature range and includes AEC-Q100 automotive qualification.

onsemi CAT34C02YI-GT5A: This part provides electrical equivalence at 400 kHz with 900 ns access time and 1.7V to 5.5V supply voltage support. Inventory availability is substantial at 21561 units. Operating temperature range is -40°C to 85°C.

Rohm Semiconductor BR24G02FVT-3GE2: The BR24G02FVT-3GE2 operates at 400 kHz with 1.6V minimum supply voltage (lower than the primary part's 1.7V specification). This part is suitable for applications with lower voltage requirements. Operating temperature range is -40°C to 85°C.

Renesas Electronics R1EX24002ATAS0I#U0: This part maintains 400 kHz I2C operation with 900 ns access time and 1.8V to 5.5V supply voltage support. Operating temperature range is -40°C to 85°C. The part is ROHS3 compliant with MSL 1 rating.

All substitute parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating. Selection should prioritize inventory availability, required operating temperature range, and packaging format compatibility with production equipment.

Frequently Asked Questions (FAQ)

Q: Can the 34AA02T-E/ST replace the 34AA02-E/ST in all applications? A: Yes. The 34AA02T-E/ST is electrically and functionally identical to the 34AA02-E/ST. The only difference is packaging format: the 34AA02T-E/ST is supplied in Tape & Reel format while the 34AA02-E/ST is supplied in Tube format. Both parts are suitable for identical circuit applications.

Q: What is the key difference between the 400 kHz and 1 MHz I2C variants? A: The 400 kHz variants (34AA02-E/ST, M24C02-FDW6TP, M34E02-FDW6TP) operate at standard I2C speed with 900 ns access time and 5ms write cycle time. The 1 MHz variants (M24C02-DRDW3TP/K, M24C02-DRDW8TP/K) provide faster I2C communication at 1 MHz with 450 ns access time and 4ms write cycle time. Both are compatible with standard I2C bus protocols; the 1 MHz variants are suitable for applications requiring higher data throughput.

Q: Are all substitute parts compatible with the 8-TSSOP package footprint? A: All listed substitute parts use the 8-TSSOP package form factor with 0.173" width and 4.40mm width specification. The Rohm Semiconductor BR24G02FVT-3GE2 uses the 8-TSSOP-B variant, which maintains identical footprint compatibility. All parts are suitable for PCB designs using standard 8-TSSOP land patterns.

Q: What is the minimum supply voltage requirement for substitute selection? A: The primary 34AA02-E/ST supports 1.7V to 5.5V. Most substitute parts maintain this specification. The Rohm BR24G02FVT-3GE2 supports 1.6V minimum, which is lower. The Renesas R1EX24002ATAS0I#U0 and STMicroelectronics M24C02 series support 1.8V minimum. Verify supply voltage compatibility with your circuit design before substitution.

Q: Does operating temperature range affect substitution compatibility? A: The primary 34AA02-E/ST operates from -40°C to 125°C. Most substitute parts are rated to -40°C to 85°C, which is acceptable for applications not requiring the full upper temperature range. The STMicroelectronics M24C02-DRDW3TP/K maintains -40°C to 125°C operation. Verify your application's temperature requirements before selecting a substitute part with a reduced upper temperature limit.

Q: What does AEC-Q100 qualification mean for the M24C02-DRDW3TP/K? A: AEC-Q100 is an automotive qualification standard. The M24C02-DRDW3TP/K carries this qualification, indicating it meets automotive industry reliability and quality standards. This part is suitable for automotive applications requiring qualified components. Non-automotive applications do not require this qualification.

Q: Which substitute part has the highest inventory availability? A: The M34E02-FDW6TP from STMicroelectronics has the highest inventory with 41228 units in stock. This part is electrically equivalent to the primary 34AA02-E/ST at 400 kHz I2C operation and carries verified DiGi-Electronics programmable status.

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