24AA08H-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24AA08H-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 at 400 kHz I2C clock frequency with 900 ns access time and supports a supply voltage range of 1.7V to 5.5V. The device is actively produced and ROHS3 compliant. Equivalent substitute parts are identified when they maintain identical electrical specifications, memory organization, interface protocol, and physical packaging to ensure direct functional replacement without circuit redesign.

Substiute Parts

24AA08H-I/ST

Microchip TechnologyIn Stock: 113024AA08H-I/ST Datasheet

Current PartRFQ

CAT24C08YI-G

onsemiIn Stock: 1578CAT24C08YI-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The CAT24C08YI-G manufactured by onsemi qualifies as a parametric equivalent to the 24AA08H-I/ST based on the following critical substitution criteria:

• Memory Capacity & Organization: Both devices provide 8Kbit EEPROM storage with I2C interface protocol
• Electrical Performance: Identical clock frequency (400 kHz), access time (900 ns), and write cycle time (5ms)
• Supply Voltage Compatibility: Both operate across 1.7V to 5.5V range
• Temperature Rating: Matching -40°C to 85°C operating range
• Physical Package: Identical 8-TSSOP surface mount package with 0.173" (4.40mm) width
• Compliance Standards: Both ROHS3 compliant with MSL 1 rating

Parameter Comparison

Engineering Selection Recommendations

Both the 24AA08H-I/ST and CAT24C08YI-G are active production devices with ROHS3 compliance and identical MSL ratings. Selection between these parts may be based on:

• Inventory Availability: CAT24C08YI-G currently has 1470 pcs in stock versus 1087 pcs for 24AA08H-I/ST
• Manufacturer Preference: Microchip Technology versus onsemi based on supply chain strategy or existing vendor relationships
• Compliance Requirements: Both meet REACH unaffected and EAR99 ECCN classifications

No electrical or mechanical redesign is required when substituting between these devices.

Frequently Asked Questions (FAQ)

Q: Can the CAT24C08YI-G directly replace the 24AA08H-I/ST in existing designs?

A: Yes. Both devices share identical electrical specifications, memory capacity, I2C interface protocol, supply voltage range, operating temperature range, and 8-TSSOP package dimensions. Direct PCB substitution is possible without circuit modification.

Q: Are there any pin configuration differences between these parts?

A: No. Both devices use the 8-TSSOP package with identical pinout and electrical characteristics, ensuring direct socket compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 24AA08H-I/ST and CAT24C08YI-G are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the memory organization difference between 256 x 8 x 4 and 1K x 8?

A: Both organizations represent 8Kbit total capacity. The 256 x 8 x 4 notation indicates 4 pages of 256 bytes each, while 1K x 8 represents 1024 bytes of 8-bit width. Both provide identical functional capacity and I2C addressability for this 8Kbit device class.

Q: Are there any temperature or voltage derating considerations when substituting?

A: No. Both devices operate identically across the -40°C to 85°C temperature range and 1.7V to 5.5V supply voltage range with no derating differences.