Equivalent & Substitute Parts for 24LC64FT-I/MS

Part Overview

The 24LC64FT-I/MS is a 64Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 900 ns access time. The device operates across a 2.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature. Packaged in 8-MSOP surface mount configuration, this component is actively produced and RoHS3 compliant.

Substitute parts are necessary when the original part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when enhanced performance specifications (higher clock frequency, lower access time, or extended temperature range) are needed for specific applications.

Substiute Parts

24LC64FT-I/MS

Microchip TechnologyIn Stock: 93424LC64FT-I/MS Datasheet

Current PartRFQ

24AA64T-I/MS

Microchip TechnologyIn Stock: 1751324AA64T-I/MS Datasheet

MFR RecommendedRFQ

24FC64T-I/MS

Microchip TechnologyIn Stock: 317324FC64T-I/MS Datasheet

MFR RecommendedRFQ

24LC64T-E/MS

Microchip TechnologyIn Stock: 370224LC64T-E/MS Datasheet

MFR RecommendedRFQ

24LC64T-I/ST

Microchip TechnologyIn Stock: 1782724LC64T-I/ST Datasheet

MFR RecommendedRFQ

24LC64T-I/MS

Microchip TechnologyIn Stock: 927824LC64T-I/MS Datasheet

Parametric EquivalentRFQ

BR24G64FVM-3GTTR

Rohm SemiconductorIn Stock: 5791BR24G64FVM-3GTTR Datasheet

MFR RecommendedRFQ

BR24T64FVJ-WE2

Rohm SemiconductorIn Stock: 1320BR24T64FVJ-WE2 Datasheet

MFR RecommendedRFQ

BR24T64FVM-WTR

ROHM SemiconductorIn Stock: 3734BR24T64FVM-WTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 24LC64FT-I/MS is determined by the following critical parameters:

• Memory Capacity & Organization: All substitutes must maintain 64Kbit capacity with 8K x 8 organization to ensure software compatibility and address space equivalence.
• Interface Protocol: I2C interface is mandatory; no alternative protocols are acceptable.
• Electrical Compatibility: Supply voltage range must encompass or exceed 2.5V minimum and 5.5V maximum to ensure operation in the original application circuit.
• Package & Mounting: Substitutes are grouped by package type (8-MSOP or 8-TSSOP) and surface mount configuration.
• Performance Specifications: Clock frequency, access time, and write cycle time determine functional equivalence or enhancement.
• Compliance & Status: Active product status and RoHS3 compliance are required for new designs.

Substitutes are categorized as:

• MFR Recommended: Manufacturer-approved alternatives with identical or superior electrical specifications.
• Parametric Equivalent: Parts meeting all electrical and functional requirements with identical performance.
• Package Variant: Same electrical specifications but different package format (8-TSSOP vs. 8-MSOP).
• Enhanced Performance: Higher clock frequency or faster access time while maintaining backward compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Microchip Technology - Recommended for New Designs)

24LC64T-I/MS is the direct parametric equivalent to 24LC64FT-I/MS, offering identical electrical specifications with the same 8-MSOP package. Both parts are Active status and RoHS3 compliant. Selection between these two depends on packaging format availability: 24LC64FT-I/MS is supplied in Tape & Reel format, while 24LC64T-I/MS is available in Cut Tape & Digi-Reel format.

24AA64T-I/MS provides extended lower voltage operation (1.7V minimum vs. 2.5V) while maintaining identical memory capacity, interface, and performance characteristics. This part is suitable for applications requiring lower supply voltage margins and is Active status with RoHS3 compliance.

24FC64T-I/MS offers enhanced performance with 1 MHz clock frequency and 400 ns access time, representing a 2.5x improvement in clock speed and 2.25x improvement in access time compared to the original part. This substitute is backward compatible and suitable for applications requiring faster I2C communication. Active status and RoHS3 compliant.

24LC64T-E/MS maintains identical electrical and performance specifications to the original part but extends the operating temperature range to -40°C to 125°C, accommodating high-temperature applications. Active status and RoHS3 compliant.

Package Variant Substitute

24LC64T-I/ST provides identical electrical specifications and performance to the original part but uses 8-TSSOP package (0.173" width) instead of 8-MSOP (0.118" width). This substitute is suitable when board layout or manufacturing processes require the larger TSSOP footprint. Active status and RoHS3 compliant.

Alternative Manufacturer Substitutes (Rohm Semiconductor)

BR24G64FVM-3GTTR and BR24T64FVM-WTR are Rohm Semiconductor alternatives offering 64Kbit I2C EEPROM functionality with extended lower voltage operation (1.6V minimum). Both maintain 400 kHz clock frequency and 5 ms write cycle time. BR24G64FVM-3GTTR uses 8-MSOP package; BR24T64FVM-WTR also uses 8-MSOP. Both are Active status and RoHS3 compliant. These substitutes are suitable when Rohm components are preferred or when lower voltage operation is required.

BR24T64FVJ-WE2 is a Rohm Semiconductor alternative with 8-TSSOP package configuration. This part carries "Not For New Designs" status and should be used only for legacy system maintenance or replacement scenarios.

Frequently Asked Questions (FAQ)

Q: Can 24AA64T-I/MS replace 24LC64FT-I/MS in my application?

A: Yes, 24AA64T-I/MS is a valid substitute. Both parts maintain identical 64Kbit capacity, 8K x 8 organization, I2C interface, 400 kHz clock frequency, and 900 ns access time. The primary difference is that 24AA64T-I/MS operates at lower minimum voltage (1.7V vs. 2.5V). If your application circuit supplies 2.5V or higher, both parts are functionally equivalent. Packaging format differs: 24AA64T-I/MS is supplied in Cut Tape & Digi-Reel format versus Tape & Reel for the original part.

Q: What is the advantage of 24FC64T-I/MS over the original 24LC64FT-I/MS?

A: 24FC64T-I/MS provides enhanced performance with 1 MHz clock frequency (2.5x faster than 400 kHz) and 400 ns access time (2.25x faster than 900 ns). This substitute is backward compatible and suitable for applications requiring faster I2C communication speeds. Both parts maintain identical 64Kbit capacity and 8-MSOP package. The trade-off is that 24FC64T-I/MS has lower minimum voltage (1.7V vs. 2.5V), which may be advantageous in low-power applications.

Q: Can I use a Rohm Semiconductor part instead of Microchip Technology?

A: Yes, BR24G64FVM-3GTTR and BR24T64FVM-WTR are valid alternatives from Rohm Semiconductor. Both maintain 64Kbit capacity, I2C interface, and 400 kHz clock frequency. Rohm parts offer extended lower voltage operation (1.6V minimum). BR24G64FVM-3GTTR uses 8-MSOP package matching the original part's footprint. Both are Active status and RoHS3 compliant. Verify with your design team if cross-manufacturer qualification is required.

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

A: Both are 8-pin surface mount packages for EEPROM devices. 8-MSOP (Mini Small Outline Package) has 0.118" width and 3.00mm body width. 8-TSSOP (Thin Shrink Small Outline Package) has 0.173" width and 4.40mm body width. The TSSOP package is larger and may require different PCB footprint and assembly considerations. Electrical specifications remain identical between package variants. Select based on your PCB layout requirements and manufacturing capabilities.

Q: Why is BR24T64FVJ-WE2 marked "Not For New Designs"?

A: BR24T64FVJ-WE2 carries "Not For New Designs" status, indicating that Rohm Semiconductor is phasing out this part number. While it remains functionally equivalent to the original part with 64Kbit capacity and I2C interface, it should be used only for legacy system maintenance or replacement of existing units. For new designs, select from Active status alternatives such as BR24G64FVM-3GTTR, BR24T64FVM-WTR, or Microchip Technology options.

Q: Can I substitute 24LC64T-E/MS for extended temperature applications?

A: Yes, 24LC64T-E/MS is suitable for applications requiring extended operating temperature range. It maintains identical electrical specifications to the original part (64Kbit, I2C, 400 kHz, 900 ns access time, 2.5V ~ 5.5V supply) but extends the upper temperature limit to 125°C (versus 85°C for the original part). This substitute is Active status and RoHS3 compliant. Use this part when your application requires operation in high-temperature environments.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all substitute parts listed are RoHS3 compliant. The original 24LC64FT-I/MS is also RoHS3 compliant. All parts meet REACH requirements and carry EAR99 ECCN classification. Moisture Sensitivity Level (MSL) varies: Microchip parts with -I suffix have MSL 1 (Unlimited), while 24AA64T-I/MS and 24FC64T-I/MS have MSL 2 (1 Year). Rohm parts have MSL 1 (Unlimited).