24FC01-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24FC01-E/ST is a 1Kbit EEPROM memory integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates via I2C interface at 1 MHz clock frequency and is housed in an 8-TSSOP surface mount package. The device is actively produced and maintains full RoHS3 compliance. Substitute parts are identified when equivalent memory capacity, interface protocol, package form factor, and electrical operating ranges are maintained across alternative manufacturers.

Substiute Parts

24FC01-E/ST

Microchip TechnologyIn Stock: 94724FC01-E/ST Datasheet

Current PartRFQ

BR24L01AFVT-WE2

ROHM SemiconductorIn Stock: 5932BR24L01AFVT-WE2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 24FC01-E/ST is determined by the following critical parameters:

Memory Specifications: Memory size must equal 1Kbit with 128 x 8 organization. Memory format must be EEPROM with non-volatile technology.

Interface Requirements: I2C protocol is mandatory. Clock frequency must support 1 MHz operation or lower frequencies compatible with I2C standard specifications.

Electrical Compatibility: Supply voltage range must overlap with or encompass the 1.7V ~ 5.5V range. Operating temperature range must support the application's thermal requirements.

Package Compatibility: 8-TSSOP surface mount package with 0.173" (4.40mm) width is required for PCB layout compatibility.

Compliance Standards: RoHS3 compliance is required. REACH unaffected status must be maintained.

The BR24L01AFVT-WE2 from ROHM Semiconductor qualifies as a substitute based on matching memory capacity, I2C interface, 8-TSSOP package form factor, overlapping voltage range (1.8V ~ 5.5V), and equivalent RoHS3 compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 24FC01-E/ST and BR24L01AFVT-WE2 maintain active product status and full RoHS3 compliance, confirming ongoing manufacturer support and regulatory alignment.

The 24FC01-E/ST operates at 1 MHz clock frequency with an extended temperature range of -40°C ~ 125°C and supply voltage floor of 1.7V. Selection of this part is appropriate for applications requiring maximum clock speed performance and extended high-temperature operation.

The BR24L01AFVT-WE2 operates at 400 kHz clock frequency with a temperature range of -40°C ~ 85°C and supply voltage floor of 1.8V. This substitute is suitable for applications where the lower clock frequency is acceptable and the narrower temperature and voltage ranges meet system requirements. The BR24L01AFVT-WE2 is available in higher inventory quantity (5873 Pcs vs. 849 Pcs).

Both parts are supplied in 8-TSSOP surface mount packages with identical 0.173" (4.40mm) width, ensuring PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can BR24L01AFVT-WE2 replace 24FC01-E/ST in all applications?

A: Substitution is valid when the application's I2C clock frequency requirement does not exceed 400 kHz, operating temperature does not exceed 85°C, and minimum supply voltage is 1.8V or higher. The 24FC01-E/ST supports higher clock frequencies (1 MHz) and extended temperature range (-40°C ~ 125°C).

Q: Are the 8-TSSOP and 8-TSSOP-B packages physically compatible?

A: Both packages maintain 0.173" (4.40mm) width and 8-pin TSSOP configuration. The "-B" designation indicates a variant within the TSSOP family. PCB footprint compatibility must be verified against the specific package drawings provided by each manufacturer.

Q: What is the impact of the 400 kHz vs. 1 MHz clock frequency difference?

A: The BR24L01AFVT-WE2 operates at 400 kHz, which is the standard I2C fast mode frequency. The 24FC01-E/ST supports 1 MHz operation. Applications using standard I2C protocols at 100 kHz or 400 kHz will function identically with either part. Applications requiring 1 MHz operation require the 24FC01-E/ST.

Q: Are both parts RoHS3 compliant?

A: Yes. Both 24FC01-E/ST and BR24L01AFVT-WE2 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the minimum supply voltage difference between these parts?

A: The 24FC01-E/ST operates from 1.7V minimum, while BR24L01AFVT-WE2 operates from 1.8V minimum. Applications operating below 1.8V require the 24FC01-E/ST.