Equivalent & Substitute Parts for 24AA08HT-I/SN

Part Overview

The 24AA08HT-I/SN is an 8Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 900 ns access time. This component is designed for non-volatile data storage applications requiring low-power, serial communication in embedded systems. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package footprint and interface protocol.

Key Parameters

Parameter	Specification
Memory Size	8Kbit
Memory Format	EEPROM
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
Voltage Supply Range	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24AA08HT-I/SN are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

Memory capacity: 8Kbit
Interface protocol: I2C serial communication
Clock frequency: 400 kHz operation
Access time: 900 ns maximum
Write cycle time: 5 ms
Supply voltage range: 1.7V ~ 5.5V minimum to maximum
Operating temperature range: -40°C ~ 85°C
Package: 8-SOIC surface mount form factor
Compliance: ROHS3 and REACH unaffected status

All identified substitute parts maintain these electrical specifications and physical package dimensions, enabling direct functional replacement in circuit designs without modification to PCB layout or firmware implementation.

Parameter Comparison

Parameter	24AA08HT-I/SN (Microchip)	24AA08T-I/SN (Microchip)	CAT24C08WI-GT3 (onsemi)	M24C08-FMN6TP (STMicroelectronics)
Memory Size	8Kbit	8Kbit	8Kbit	8Kbit
Memory Format	EEPROM	EEPROM	EEPROM	EEPROM
Memory Organization	256 x 8 x 4	256 x 8 x 4	1K x 8	1K x 8
Memory Interface	I2C	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz	400 kHz
Access Time	900 ns	900 ns	900 ns	900 ns
Write Cycle Time	5 ms	5 ms	5 ms	5 ms
Voltage Supply	1.7V ~ 5.5V	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	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and mechanical compatibility with the 24AA08HT-I/SN. Selection among equivalent options is based on availability, packaging format, and supply chain considerations:

24AA08T-I/SN (Microchip Technology): Same manufacturer as the primary part with identical electrical specifications. Differs only in packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Suitable for applications where packaging preference aligns with procurement requirements.

CAT24C08WI-GT3 (onsemi): Manufactured by onsemi with verified programmability status. Maintains all critical electrical parameters and 8-SOIC package compatibility. Highest current inventory availability at 65,200 units.

M24C08-FMN6TP (STMicroelectronics): Manufactured by STMicroelectronics with verified programmability status. Maintains all critical electrical parameters and 8-SOIC package compatibility. Supplied in Cut Tape & Digi-Reel format.

All parts carry active product status, ROHS3 compliance, and REACH unaffected designation, meeting current regulatory requirements for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can 24AA08T-I/SN replace 24AA08HT-I/SN directly on the PCB?

A: Yes. Both parts share identical electrical specifications, memory capacity, I2C interface, and 8-SOIC package dimensions. The only difference is packaging format (Cut Tape versus Tape & Reel), which does not affect circuit functionality.

Q: Are onsemi CAT24C08WI-GT3 and STMicroelectronics M24C08-FMN6TP compatible with existing firmware?

A: Yes. Both parts implement the same I2C protocol, memory organization, and electrical characteristics as the Microchip 24AA08HT-I/SN. No firmware modifications are required for functional compatibility.

Q: What does "verified programmability" mean for substitute parts?

A: Verified programmability indicates that the substitute part has been tested and confirmed to function correctly in the intended application environment. This status applies to 24AA08T-I/SN, CAT24C08WI-GT3, and M24C08-FMN6TP.

Q: Do all substitute parts support the same voltage range?

A: Yes. All listed parts operate across the 1.7V to 5.5V supply voltage range, enabling use in both 3.3V and 5V logic systems without additional voltage regulation.

Q: Are there differences in access time or write cycle time between substitute parts?

A: No. All parts maintain 900 ns access time and 5 ms write cycle time specifications, ensuring equivalent performance in timing-critical applications.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC (Small Outline Integrated Circuit) package with 0.154" width and 3.90mm body width is the standard surface mount footprint for all listed parts. This ensures mechanical compatibility with existing PCB designs without layout modifications.

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

A: Yes. All parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for industrial, commercial, and consumer applications.

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