24FC512-I/MS EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24FC512-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 at 1 MHz clock frequency with 400 ns access time and supports a supply voltage range of 1.7V to 5.5V across industrial temperature ranges (-40°C to 85°C). The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory constraints, supply chain disruptions, or design flexibility for package form factors while maintaining functional compatibility across core electrical parameters.

Substiute Parts

24FC512-I/MS

Microchip TechnologyIn Stock: 78024FC512-I/MS Datasheet

Current PartRFQ

BR24G512FVT-3AGE2

Rohm SemiconductorIn Stock: 9251BR24G512FVT-3AGE2 Datasheet

MFR RecommendedRFQ

CAT24C512XI-T2

onsemiIn Stock: 4798CAT24C512XI-T2 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 24FC512-I/MS is determined by strict alignment with the following core parameters:

• Memory capacity: 512Kbit (64K x 8 organization)
• Interface protocol: I2C serial communication
• Clock frequency: 1 MHz operation
• Write cycle time: 5ms maximum
• Supply voltage compatibility: Minimum 1.7V support required
• Operating temperature range: -40°C to 85°C
• Surface mount packaging: 8-pin configurations (MSOP, TSSOP, or SOIC variants)
• Compliance: ROHS3 and REACH unaffected status

Substitute parts are grouped by package form factor while maintaining electrical equivalence. Access time variations (400 ns to 900 ns) do not affect functional substitution as all values remain within acceptable I2C timing specifications. Voltage supply floor differences (1.7V vs 1.8V vs 2.5V) are noted for application-specific validation but do not preclude substitution in standard 3.3V or 5V systems.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain full electrical equivalence to the 24FC512-I/MS across memory capacity, interface protocol, clock frequency, and write cycle timing. Selection among substitutes should be based on the following criteria:

For Active Production Designs: BR24G512FVT-3AGE2 (Rohm), CAT24C512XI-T2 (onsemi), CAT24C512YI-GT3 (onsemi), and M24512-RDW6TP (STMicroelectronics) are all in active production status with ROHS3 compliance and REACH unaffected designation.

For Minimum Supply Voltage Requirement: If the application requires operation below 1.8V, only the 24FC512-I/MS (Microchip) and BR24G512FVT-3AGE2 (Rohm) support the 1.7V floor. The M24512-WDW6TP has a 2.5V minimum and is marked "Not For New Designs," limiting its suitability for new applications.

For Moisture Sensitivity Constraints: CAT24C512XI-T2 carries MSL 3 (168 hours), requiring controlled storage and handling. All other substitutes maintain MSL 1 (unlimited) rating, matching the original part specification.

For Package Form Factor: The 24FC512-I/MS uses 8-MSOP (3.00mm width). Substitutes are available in 8-TSSOP (4.40mm width) and 8-SOIC (5.30mm width) packages. PCB layout and thermal considerations must validate package compatibility before selection.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 24FC512-I/MS with any of these parts without design changes?

A: Electrical substitution is valid for all listed parts. However, package form factor differences require PCB layout verification. The original 8-MSOP (3.00mm) differs from 8-TSSOP (4.40mm) and 8-SOIC (5.30mm) alternatives, necessitating footprint and routing assessment.

Q: What is the significance of access time differences (400 ns vs 500 ns vs 900 ns)?

A: All access times listed fall within I2C protocol timing margins. The 400 ns specification of the 24FC512-I/MS represents faster response, while 500 ns and 900 ns alternatives remain functionally compatible for standard I2C bus operation at 1 MHz clock frequency.

Q: Why does M24512-WDW6TP show "Not For New Designs" status?

A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new applications. While electrically functional, it should not be selected for new designs. Use M24512-RDW6TP (active status) from STMicroelectronics instead.

Q: Is the 1.7V to 1.8V supply voltage difference critical?

A: For applications operating at 3.3V or 5.0V, this difference is not critical. However, for ultra-low-power designs operating near 1.7V, only the 24FC512-I/MS and BR24G512FVT-3AGE2 guarantee operation. Verify your application's minimum supply voltage requirement before substitution.

Q: What does MSL 3 (168 hours) on the CAT24C512XI-T2 mean?

A: MSL 3 indicates the component can absorb moisture for up to 168 hours after package opening before soldering. MSL 1 (unlimited) parts like the original have no time restriction. For high-volume manufacturing or extended storage, MSL 1 parts reduce reflow risk and baking requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitutes carry ROHS3 compliance and REACH unaffected status, matching the original 24FC512-I/MS specification for environmental and regulatory requirements.