24AA08/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24AA08/ST is an 8Kbit I2C EEPROM memory integrated circuit manufactured by Microchip Technology in an 8-TSSOP surface mount package. This component is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this memory interface standard.

Substiute Parts

24AA08/ST

Microchip TechnologyIn Stock: 79724AA08/ST Datasheet

Current PartRFQ

24AA08-I/ST

Microchip TechnologyIn Stock: 506924AA08-I/ST Datasheet

MFR RecommendedRFQ

24AA08H-I/ST

Microchip TechnologyIn Stock: 113024AA08H-I/ST Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 24AA08/ST are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters: Memory size (8Kbit), memory format (EEPROM), memory organization (256 x 8 x 4), I2C interface protocol, clock frequency (400 kHz), access time (900 ns), write cycle time (5ms), and supply voltage range (1.7V ~ 5.5V).

Mechanical Parameters: Package type (8-TSSOP), package dimensions (0.173", 4.40mm Width), and surface mount mounting type.

Compliance Parameters: RoHS3 compliance and MSL rating (1 - Unlimited).

Substitute parts must maintain identical electrical and mechanical specifications to ensure direct replacement capability without circuit redesign or PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

The 24AA08/ST is classified as obsolete product status. The recommended substitute parts are 24AA08-I/ST and 24AA08H-I/ST, both manufactured by Microchip Technology with active product status.

Both substitute parts maintain identical electrical specifications and package configuration as the main part. The primary difference is the extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C for the main part), which provides broader environmental compatibility. Both substitutes are ROHS3 compliant and carry MSL rating 1 (Unlimited), meeting the same compliance requirements as the original part.

Selection between 24AA08-I/ST and 24AA08H-I/ST should be based on application-specific requirements and supply chain availability. Both parts are functionally interchangeable with the 24AA08/ST in applications where the extended temperature range does not introduce design constraints.

Frequently Asked Questions (FAQ)

Q: Can 24AA08-I/ST and 24AA08H-I/ST be used as direct replacements for 24AA08/ST?

A: Yes. Both substitute parts maintain identical memory capacity (8Kbit), memory organization (256 x 8 x 4), I2C interface protocol, clock frequency (400 kHz), access time (900 ns), write cycle time (5ms), supply voltage range (1.7V ~ 5.5V), and 8-TSSOP package configuration. Direct PCB substitution is supported without circuit modification.

Q: What is the difference between the substitute parts?

A: The 24AA08-I/ST and 24AA08H-I/ST are functionally equivalent. Both are active products from Microchip Technology with identical electrical and mechanical specifications. Selection should be based on availability and supply chain considerations.

Q: Are there temperature range considerations for substitution?

A: The main part 24AA08/ST operates from 0°C ~ 70°C. Both substitute parts operate from -40°C ~ 85°C, providing extended temperature capability. Applications operating within the original temperature range will function identically with either substitute part.

Q: Do the substitute parts maintain the same package footprint?

A: Yes. All parts use the 8-TSSOP package with identical dimensions (0.173", 4.40mm Width). PCB layout and component placement remain unchanged.

Q: Are compliance certifications maintained with substitute parts?

A: Yes. Both substitute parts are ROHS3 compliant and carry MSL rating 1 (Unlimited), matching the compliance profile of the original 24AA08/ST.