FT24C04A-ENR-T EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The FT24C04A-ENR-T is a 4Kbit I2C EEPROM memory integrated circuit manufactured by Fremont Micro Devices Ltd. This non-volatile memory device operates at 1 MHz with a 550 ns access time and supports a supply voltage range of 1.8V to 5.5V. The component is housed in an 8-WFDFN exposed pad surface mount package with 512 x 8 memory organization.

The FT24C04A-ENR-T has been discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this EEPROM memory architecture.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	4Kbit
Memory Organization	512 x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	550 ns
Write Cycle Time	5 ms
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package Type	8-WFDFN Exposed Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the FT24C04A-ENR-T are identified based on strict equivalence across the following critical parameters:

Memory capacity: 4Kbit
Memory organization: 512 x 8
Interface protocol: I2C
Clock frequency: 1 MHz
Access time: 550 ns
Write cycle time: 5 ms
Supply voltage range: 1.8V ~ 5.5V
Operating temperature range: -40°C ~ 85°C
Mounting type: Surface Mount
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

The substitute parts listed below maintain full electrical and functional compatibility with the main part number while differing only in packaging configuration or product status.

Parameter Comparison

Parameter	FT24C04A-ENR-T	FT24C04A-KNR-T	FT24C04A-UNR-T
Manufacturer	Fremont Micro Devices Ltd	Fremont Micro Devices Ltd	Fremont Micro Devices Ltd
Memory Size	4Kbit	4Kbit	4Kbit
Memory Organization	512 x 8	512 x 8	512 x 8
Memory Interface	I2C	I2C	I2C
Clock Frequency	1 MHz	1 MHz	1 MHz
Access Time	550 ns	550 ns	550 ns
Write Cycle Time	5 ms	5 ms	5 ms
Voltage Supply Range	1.8V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-WFDFN Exposed Pad	8-UFDFN Exposed Pad	8-WFDFN Exposed Pad
Supplier Device Package	8-DFN (2x3)	8-UDFN (2x3)	8-DFN (2x3)
Packaging Configuration	Tube	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

FT24C04A-KNR-T is a direct manufacturer substitute with active product status. This part maintains identical electrical specifications and memory architecture while differing in package configuration (8-UFDFN versus 8-WFDFN) and supply format (Tape & Reel). Selection of this part is appropriate for applications where tape and reel packaging is compatible with assembly processes and where the UFDFN package variant meets PCB layout requirements.

FT24C04A-UNR-T is a parametric equivalent with active product status. This part provides identical electrical performance and memory specifications while maintaining the same 8-WFDFN package type as the original part. Supply format differs only in packaging configuration (Tape & Reel versus tube). This part represents the closest functional equivalent for direct replacement in existing designs.

Both substitute parts carry ROHS3 compliance and REACH unaffected status, matching the regulatory compliance profile of the discontinued FT24C04A-ENR-T.

Frequently Asked Questions (FAQ)

Q: Can FT24C04A-KNR-T and FT24C04A-UNR-T be used interchangeably with FT24C04A-ENR-T?

A: Both parts are electrically and functionally equivalent to the FT24C04A-ENR-T across all critical parameters including memory capacity, interface protocol, timing specifications, and voltage range. Differences exist only in packaging configuration and supply format. PCB layout compatibility must be verified for the specific package variant selected.

Q: What is the difference between 8-WFDFN and 8-UFDFN packages?

A: Both are 8-pin DFN (Dual Flat No-Lead) packages with 2x3 mm dimensions. The primary distinction is in the package variant designation. Mechanical compatibility with existing PCB footprints must be confirmed before substitution.

Q: Why is the FT24C04A-ENR-T discontinued?

A: The original part has been discontinued at DiGi Electronics. The active substitute parts FT24C04A-KNR-T and FT24C04A-UNR-T provide continued access to equivalent 4Kbit I2C EEPROM functionality from the same manufacturer.

Q: Are there any compliance or regulatory differences between these parts?

A: All three parts maintain identical RoHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level 1 (Unlimited) ratings. No regulatory or compliance differences exist between the main part and substitute parts.

Q: What packaging format should I select for production assembly?

A: FT24C04A-ENR-T was supplied in tube format. FT24C04A-KNR-T and FT24C04A-UNR-T are supplied in Tape & Reel format. Selection depends on your assembly equipment compatibility and volume requirements. Tape & Reel format is standard for automated pick-and-place assembly processes.

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