34AA02T-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 34AA02T-E/ST is a 2Kbit I2C EEPROM memory integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates at 400 kHz clock frequency with 900 ns access time and is housed in an 8-TSSOP surface mount package. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, supply chain discontinuity, or design flexibility 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	-40°C ~ 125°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 for the 34AA02T-E/ST are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: I2C protocol
Package Type: 8-TSSOP form factor
Mounting Type: Surface Mount
Clock Frequency: 400 kHz (primary specification)
Access Time: 900 ns (primary specification)
Write Cycle Time: 5ms (primary specification)

Acceptable Variation Parameters:

Voltage Supply Range: Minimum 1.6V to 1.8V acceptable; Maximum 5.5V required
Operating Temperature: Minimum -40°C required; Maximum 85°C to 125°C acceptable
Packaging Format: Cut Tape (CT) or Tape & Reel (TR) both acceptable

Substitute parts meeting all critical parameters and operating within acceptable variation ranges are listed below.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Write Cycle	Voltage Supply	Temp Range	Package	Status
34AA02T-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
BR24G02FVT-3AGE2	Rohm Semiconductor	2Kbit	1 MHz	N/A	5ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
BR24G02FVT-3GE2	Rohm Semiconductor	2Kbit	400 kHz	N/A	5ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
CAT34C02YI-GT5A	onsemi	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
CAV24C02YE-GT3	onsemi	2Kbit	400 kHz	900 ns	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
M24C02-DRDW3TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	4ms	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
M24C02-DRDW8TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	4ms	1.8V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	Active
M24C02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
M34E02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
R1EX24002ATAS0I#U0	Renesas Electronics	2Kbit	400 kHz	900 ns	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Specifications):

The following parts match all critical electrical parameters of the 34AA02T-E/ST:

M34E02-FDW6TP (STMicroelectronics): Identical clock frequency (400 kHz), access time (900 ns), write cycle (5ms), and voltage range (1.7V ~ 5.5V). DiGi-Electronics Programmable status verified. Highest inventory availability (41,228 pcs).
CAT34C02YI-GT5A (onsemi): Identical electrical specifications with matching voltage range and access time. Highest inventory among direct equivalents (21,561 pcs).
R1EX24002ATAS0I#U0 (Renesas Electronics Corporation): Matches all critical parameters with voltage range 1.8V ~ 5.5V. Part of R1EX24xxx series.

Automotive-Grade Alternatives:

CAV24C02YE-GT3 (onsemi): AEC-Q100 qualified automotive-grade part. Identical electrical specifications with extended temperature range (-40°C ~ 125°C) matching the main part. Voltage range 2.5V ~ 5.5V.
M24C02-DRDW3TP/K (STMicroelectronics): AEC-Q100 qualified. Higher clock frequency (1 MHz) with faster access time (450 ns) and shorter write cycle (4ms). Extended temperature range (-40°C ~ 125°C).

Higher-Speed Alternatives:

BR24G02FVT-3AGE2 (Rohm Semiconductor): 1 MHz clock frequency with 5ms write cycle. Voltage range 1.6V ~ 5.5V. Temperature range -40°C ~ 85°C.
M24C02-DRDW8TP/K (STMicroelectronics): 1 MHz operation with 450 ns access time. Automotive-grade AEC-Q100 qualified.

All substitute parts are ROHS3 compliant, MSL rating 1 (Unlimited), and available in Active status.

Frequently Asked Questions (FAQ)

Q: Can BR24G02FVT-3AGE2 replace 34AA02T-E/ST in all applications?

A: BR24G02FVT-3AGE2 operates at 1 MHz clock frequency versus 400 kHz for the 34AA02T-E/ST. The higher clock speed is backward compatible with 400 kHz I2C bus operation. However, the operating temperature range is limited to -40°C ~ 85°C compared to -40°C ~ 125°C for the main part. Substitution is valid only for applications not requiring the extended upper temperature range.

Q: What is the difference between M24C02-FDW6TP and M34E02-FDW6TP?

A: Both parts are manufactured by STMicroelectronics with identical electrical specifications (400 kHz, 900 ns access time, 5ms write cycle, 1.7V ~ 5.5V). The primary difference is DiGi-Electronics Programmable status: M34E02-FDW6TP is verified while M24C02-FDW6TP is not verified. M34E02-FDW6TP has significantly higher inventory (41,228 pcs vs. 17,178 pcs).

Q: Are all substitute parts available in 8-TSSOP package?

A: Yes. All listed substitute parts use 8-TSSOP surface mount package with 0.173" width and 4.40mm dimensions, matching the mechanical footprint of 34AA02T-E/ST. Package variants include 8-TSSOP and 8-TSSOP-B, which are mechanically compatible.

Q: Which substitute offers the best temperature range coverage?

A: CAV24C02YE-GT3 and M24C02-DRDW3TP/K both support -40°C ~ 125°C operating temperature, matching the 34AA02T-E/ST specification. CAV24C02YE-GT3 maintains the 400 kHz clock frequency, while M24C02-DRDW3TP/K operates at 1 MHz.

Q: Is voltage supply range compatibility critical for substitution?

A: Yes. The main part specifies 1.7V ~ 5.5V. Substitute parts with minimum voltage of 1.6V or 1.8V are acceptable as they cover the specified range. CAV24C02YE-GT3 with 2.5V minimum is suitable only for applications not requiring operation below 2.5V.

Q: What is the significance of AEC-Q100 qualification?

A: AEC-Q100 qualification indicates automotive-grade reliability testing. CAV24C02YE-GT3 and M24C02-DRDW3TP/K carry this qualification, making them suitable for automotive applications requiring enhanced reliability standards.

Q: Can I use a higher-speed part (1 MHz) as a drop-in replacement?

A: Yes. Higher clock frequency parts (BR24G02FVT-3AGE2, M24C02-DRDW3TP/K, M24C02-DRDW8TP/K) are backward compatible with 400 kHz I2C bus specifications. The I2C protocol allows devices to operate at lower bus speeds than their maximum rated frequency.

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