24AA512T-I/MS EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24AA512T-I/MS is a 512Kbit I2C EEPROM memory IC manufactured by Microchip Technology, designed for non-volatile data storage applications requiring serial communication. This device operates across a wide voltage range (1.7V to 5.5V) and temperature range (-40°C to 85°C), making it suitable for industrial and consumer applications. The part is currently in Active product status with 1112 units in stock.

Substitute parts are necessary when the primary device becomes unavailable, when alternative packaging formats are required for manufacturing optimization, or when design specifications allow for compatible alternatives from qualified manufacturers.

Substiute Parts

24AA512T-I/MS

Microchip TechnologyIn Stock: 122224AA512T-I/MS Datasheet

Current PartRFQ

BR24G512FVT-3AGE2

Rohm SemiconductorIn Stock: 9251BR24G512FVT-3AGE2 Datasheet

MFR RecommendedRFQ

CAT24C512YI-GT3

onsemiIn Stock: 17209CAT24C512YI-GT3 Datasheet

MFR RecommendedRFQ

M24512-RDW6TP

STMicroelectronicsIn Stock: 2094M24512-RDW6TP Datasheet

MFR RecommendedRFQ

M24512-WDW6TP

STMicroelectronicsIn Stock: 1998M24512-WDW6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 24AA512T-I/MS is determined by the following critical parameters:

Core Functional Requirements:

• Memory capacity: 512Kbit
• Memory organization: 64K x 8
• Interface protocol: I2C
• Write cycle time: 5ms
• Operating temperature range: -40°C ~ 85°C
• Voltage supply compatibility: minimum 1.7V support

Mechanical Compatibility:

• Surface mount technology
• Pin count: 8 pins
• Package family: MSOP or TSSOP variants

Compliance Requirements:

• RoHS3 compliance
• REACH unaffected status
• ECCN: EAR99

All listed substitute parts meet these core requirements. Variations in clock frequency (400 kHz vs. 1 MHz) and access time (900 ns vs. 500 ns) represent performance enhancements that maintain backward compatibility. Package width differences (3.00mm MSOP vs. 4.40mm TSSOP) require PCB layout verification but do not affect electrical functionality.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

BR24G512FVT-3AGE2, CAT24C512YI-GT3, and M24512-RDW6TP are all qualified substitutes with Active product status. These parts maintain full functional compatibility with the 24AA512T-I/MS while offering enhanced clock frequency (1 MHz vs. 400 kHz) and, in the case of M24512-RDW6TP and M24512-WDW6TP, faster access times (500 ns vs. 900 ns).

Voltage Supply Consideration:

The 24AA512T-I/MS supports operation down to 1.7V. CAT24C512YI-GT3 and both M24512 variants specify minimum 1.8V or 2.5V respectively. Applications requiring 1.7V operation must use the 24AA512T-I/MS or BR24G512FVT-3AGE2.

Package Format Impact:

The 24AA512T-I/MS uses 8-MSOP packaging (3.00mm width), while all substitute parts use 8-TSSOP packaging (4.40mm width). PCB layout modifications are required for package substitution. Pin-to-pin electrical compatibility is maintained.

Avoid for New Designs:

M24512-WDW6TP carries "Not For New Designs" status and should not be selected for new product development, despite technical compatibility.

Recommended Selection Priority:

1. CAT24C512YI-GT3 (highest inventory: 17100 units, Active status, 1 MHz operation)
2. BR24G512FVT-3AGE2 (high inventory: 9152 units, Active status, lowest voltage floor at 1.7V)
3. M24512-RDW6TP (Active status, fastest access time at 500 ns)

Frequently Asked Questions (FAQ)

Q: Can I substitute the 24AA512T-I/MS with any of these parts without circuit modification?

A: Electrical substitution is direct for all listed parts. However, package format differs: the 24AA512T-I/MS uses 8-MSOP (3.00mm width) while substitutes use 8-TSSOP (4.40mm width). PCB footprint redesign is required for package substitution.

Q: What is the difference between 400 kHz and 1 MHz clock frequency?

A: The 24AA512T-I/MS operates at 400 kHz I2C bus speed, while substitute parts support 1 MHz. This represents faster data transfer capability in the substitutes. Systems designed for 400 kHz operation remain compatible with 1 MHz devices, as I2C is backward compatible at lower speeds.

Q: Does the 500 ns access time in M24512 parts affect compatibility?

A: No. The 24AA512T-I/MS specifies 900 ns access time. Substitute parts with 500 ns access time are faster and fully compatible. Faster access times do not create compatibility issues in systems designed for 900 ns specifications.

Q: Which substitute should I use if my application requires 1.7V minimum supply voltage?

A: Only BR24G512FVT-3AGE2 maintains the 1.7V minimum specification. CAT24C512YI-GT3 and M24512 variants specify 1.8V or 2.5V minimums and are not suitable for 1.7V applications.

Q: Why is M24512-WDW6TP marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and support for this part number. While technically compatible, it should not be selected for new product designs. Use M24512-RDW6TP instead.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, matching the compliance profile of the 24AA512T-I/MS.

Q: What is the difference between 8-MSOP and 8-TSSOP packaging?

A: Both are 8-pin surface mount packages with identical pin count and electrical function. The primary difference is package width: MSOP is 3.00mm wide while TSSOP is 4.40mm wide. This requires different PCB footprints and cannot be used interchangeably without layout redesign.