24AA08T-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24AA08T-I/ST is an 8Kbit I2C EEPROM memory IC manufactured by Microchip Technology in an 8-TSSOP surface mount package. This non-volatile memory device operates across a wide supply voltage range of 1.7V to 5.5V and maintains active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical specifications and mechanical packaging requirements are met, enabling direct replacement in circuit designs without functional compromise.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Format	EEPROM
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 for the 24AA08T-I/ST are qualified based on strict equivalence across the following critical parameters:

Memory capacity of 8Kbit with EEPROM non-volatile technology ensures functional compatibility. I2C interface protocol at 400 kHz clock frequency maintains communication protocol compatibility. Access time of 900 ns and write cycle time of 5ms preserve timing specifications. Supply voltage range of 1.7V to 5.5V and operating temperature range of -40°C to 85°C ensure environmental compatibility. Physical packaging in 8-TSSOP with identical 0.173" width and 4.40mm dimensions enables direct PCB footprint compatibility. RoHS3 compliance and MSL rating of 1 confirm regulatory and handling equivalence.

Parameter Comparison

Parameter	24AA08T-I/ST (Microchip)	CAT24C08YI-GT3 (onsemi)	M24C08-FDW6TP (STMicroelectronics)
Memory Size	8Kbit	8Kbit	8Kbit
Memory Format	EEPROM	EEPROM	EEPROM
Memory Organization	256 x 8 x 4	1K x 8	1K x 8
Memory Interface	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz
Access Time	900 ns	900 ns	900 ns
Write Cycle Time	5ms	5ms	5ms
Voltage Supply Range	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-TSSOP	8-TSSOP	8-TSSOP
Package Dimensions	0.173" x 4.40mm	0.173" x 4.40mm	0.173" x 4.40mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three parts maintain active product status and full RoHS3 compliance. The CAT24C08YI-GT3 from onsemi carries verified DiGi-Electronics programmable certification, indicating validated production compatibility. The 24AA08T-I/ST from Microchip and M24C08-FDW6TP from STMicroelectronics are listed as not verified for programmable status but remain fully qualified substitutes based on parametric equivalence. Selection among these parts may be determined by supply chain availability, packaging format preference (Tape & Reel versus Cut Tape & Digi-Reel), or inventory levels at the time of procurement.

Frequently Asked Questions (FAQ)

Q: Can CAT24C08YI-GT3 or M24C08-FDW6TP be used as direct replacements for 24AA08T-I/ST?

A: Yes. All three parts share identical electrical specifications including 8Kbit capacity, I2C interface, 400 kHz clock frequency, 900 ns access time, and 5ms write cycle time. Physical packaging is identical at 8-TSSOP with matching dimensions, enabling direct PCB footprint compatibility.

Q: Are there differences in packaging format between these parts?

A: The 24AA08T-I/ST is supplied in Tape & Reel (TR) format. The CAT24C08YI-GT3 and M24C08-FDW6TP are supplied in Cut Tape (CT) & Digi-Reel format. Both formats are suitable for automated assembly; selection depends on production line equipment and volume requirements.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All three parts are RoHS3 compliant, REACH unaffected, and carry MSL rating of 1 (unlimited moisture sensitivity level). All share identical ECCN (EAR99) and HTSUS (8542.32.0051) classifications.

Q: What is the significance of DiGi-Electronics programmable verification?

A: DiGi-Electronics programmable verification indicates that the part has been validated for in-circuit programming compatibility. The CAT24C08YI-GT3 carries this verified status. The 24AA08T-I/ST and M24C08-FDW6TP are listed as not verified but remain functionally equivalent for standard EEPROM applications.

Q: Are there any temperature or voltage operating differences?

A: No. All three parts operate identically across the supply voltage range of 1.7V to 5.5V and the temperature range of -40°C to 85°C.

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