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

Part Overview

The FT24C04A-UTR-T is a 4Kbit I2C EEPROM memory IC manufactured by Fremont Micro Devices Ltd in an 8-TSSOP surface mount package. This non-volatile memory device operates at 1 MHz clock frequency with 550 ns access time and supports a supply voltage range of 1.8V to 5.5V across an operating temperature range of -40°C to 85°C. The part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility for new designs or production continuity.

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
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the FT24C04A-UTR-T is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory capacity: 4Kbit
Memory organization: 512 x 8
Interface protocol: I2C
Package type: 8-TSSOP
Mounting type: Surface Mount
RoHS compliance: ROHS3

Secondary Compatibility Criteria:

Clock frequency: 1 MHz (primary specification)
Access time: 550 ns (primary specification)
Supply voltage range: Minimum 1.8V, maximum 5.5V
Operating temperature: -40°C to 85°C
Write cycle time: 5 ms

Substitute parts are grouped into three categories:

Direct Manufacturer Substitutes: Parts from Fremont Micro Devices Ltd with identical base product number (FT24C04) and matching electrical specifications. These include FT24C04A-KTR-T and FT24C04A-KTG-T, which differ only in packaging format (Tape & Reel) and remain in active production status.

Parametric Equivalents: Parts from alternative manufacturers (Microchip Technology, Rohm Semiconductor) that meet all critical electrical and mechanical parameters. These maintain 4Kbit capacity, I2C interface, 8-TSSOP package, and compatible voltage/temperature ranges, though some variants operate at reduced clock frequencies (400 kHz) or have different access times (900 ns).

Similar Parts with Parameter Variations: Components that share core functionality but deviate in specific parameters such as clock frequency, access time, voltage range, or temperature rating. These require design verification to confirm compatibility with the original application.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Status	Inventory
FT24C04A-UTR-T	Fremont Micro Devices	4Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Discontinued	1031 Pcs
FT24C04A-KTR-T	Fremont Micro Devices	4Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	888 Pcs
FT24C04A-KTG-T	Fremont Micro Devices	4Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	847 Pcs
AT24C04C-XHM-T	Microchip Technology	4Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	3858 Pcs
AT24C04C-XPD-T	Microchip Technology	4Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active	1109 Pcs
AT24CS04-XHM-T	Microchip Technology	4Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	25680 Pcs
AT24HC04B-TH-T	Microchip Technology	4Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	8400 Pcs
BR24G04FVT-3AGE2	Rohm Semiconductor	4Kbit	1 MHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active	845 Pcs
BR24G04FVT-3GE2	Rohm Semiconductor	4Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active	1900 Pcs
BR24L04FVT-WE2	Rohm Semiconductor	4Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active	3840 Pcs
BR24T04FVT-WE2	Rohm Semiconductor	4Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active	1104 Pcs

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Recommended for Immediate Replacement):

FT24C04A-KTR-T and FT24C04A-KTG-T are direct substitutes from the original manufacturer. Both maintain identical electrical specifications (1 MHz clock, 550 ns access time, 1.8V–5.5V supply range) and package configuration. Both are in active production status with ROHS3 compliance. Selection between these two depends on packaging requirements: KTR-T is supplied in Tape & Reel format, while KTG-T is also in Tape & Reel. These parts require no design modification.

Tier 2 - Parametric Equivalents (Compatible with Verification):

AT24C04C-XHM-T (Microchip Technology) and AT24CS04-XHM-T (Microchip Technology) are parametric equivalents that match all critical specifications: 4Kbit capacity, 512 x 8 organization, I2C interface, 1 MHz clock frequency, 550 ns access time, 8-TSSOP package, and -40°C to 85°C operating range. AT24C04C-XHM-T supports 1.7V minimum supply voltage (compared to 1.8V for the original), providing broader low-voltage compatibility. AT24CS04-XHM-T has higher inventory availability (25,680 pcs). Both are ROHS3 compliant and in active production.

AT24HC04B-TH-T (Microchip Technology) is functionally equivalent with verified DiGi-Electronics programmability status. It maintains 1 MHz operation, 550 ns access time, and 1.8V–5.5V supply range. This part has substantial inventory (8,400 pcs) and active production status.

Tier 3 - Reduced Clock Frequency Variants (Application-Dependent):

AT24C04C-XPD-T operates at 400 kHz (reduced from 1 MHz) with 900 ns access time. This part includes automotive qualification (AEC-Q100) and extended temperature range (-40°C to 125°C). Use only if the application can tolerate reduced clock frequency and does not require the 1 MHz specification.

BR24G04FVT-3AGE2, BR24G04FVT-3GE2, BR24L04FVT-WE2, and BR24T04FVT-WE2 (Rohm Semiconductor) operate at 400 kHz with 8-TSSOP-B package variant. These are suitable only for applications where 400 kHz I2C operation is acceptable. BR24L04FVT-WE2 has verified programmability status and higher inventory (3,840 pcs).

Compliance and Production Status:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. Direct manufacturer substitutes (FT24C04A-KTR-T, FT24C04A-KTG-T) are in active production. Microchip Technology alternatives (AT24C04C-XHM-T, AT24CS04-XHM-T, AT24HC04B-TH-T) have robust inventory levels and active status. Rohm Semiconductor variants are in active production with varying inventory availability.

Frequently Asked Questions (FAQ)

Q: Can FT24C04A-KTR-T and FT24C04A-KTG-T be used interchangeably with FT24C04A-UTR-T?

A: Yes. Both parts are manufactured by Fremont Micro Devices Ltd and maintain identical electrical specifications (1 MHz clock, 550 ns access time, 1.8V–5.5V supply, -40°C to 85°C operating range) and 8-TSSOP package configuration. The difference is packaging format (Tape & Reel). No design modification is required.

Q: What is the difference between AT24C04C-XHM-T and AT24CS04-XHM-T?

A: Both are Microchip Technology parts with identical electrical specifications for this application (4Kbit, 1 MHz, 550 ns access time, 8-TSSOP package). The primary difference is the base product number (AT24C04 vs. AT24CS04) and inventory availability. AT24CS04-XHM-T has significantly higher stock (25,680 pcs vs. 3,858 pcs). Functionally, they are equivalent for I2C EEPROM applications.

Q: Can I use BR24G04FVT-3GE2 or BR24T04FVT-WE2 as direct replacements?

A: These Rohm Semiconductor parts operate at 400 kHz clock frequency, not 1 MHz. They are suitable only if your application can tolerate reduced I2C clock speed. The 8-TSSOP-B package is mechanically compatible with 8-TSSOP footprints. Verify that your I2C bus timing requirements do not mandate 1 MHz operation before selecting these parts.

Q: What does the 8-TSSOP-B package designation mean?

A: 8-TSSOP-B is a variant of the 8-TSSOP package used by Rohm Semiconductor. It maintains the same 0.173" width and 4.40mm dimensions as standard 8-TSSOP, ensuring mechanical compatibility with existing PCB layouts. Electrical performance and pin configuration remain identical.

Q: Is AT24C04C-XPD-T suitable for my application?

A: AT24C04C-XPD-T operates at 400 kHz (not 1 MHz) and has 900 ns access time (not 550 ns). This part is qualified for automotive applications (AEC-Q100) and supports extended temperature range (-40°C to 125°C). Use this part only if your design does not require 1 MHz I2C operation and can benefit from automotive qualification or extended temperature range.

Q: What is the minimum supply voltage for each substitute?

A: FT24C04A-UTR-T, FT24C04A-KTR-T, and FT24C04A-KTG-T support 1.8V minimum. AT24C04C-XHM-T and AT24CS04-XHM-T support 1.7V minimum (broader low-voltage range). AT24HC04B-TH-T supports 1.8V minimum. Rohm parts (BR24G04FVT-3AGE2, BR24T04FVT-WE2) support 1.6V minimum. AT24C04C-XPD-T supports 2.5V minimum. Verify your application's minimum supply voltage requirement before selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

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