FT24C02A-5LR-T EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The FT24C02A-5LR-T is a 2Kbit I2C EEPROM memory IC manufactured by Fremont Micro Devices Ltd in SOT-23-5 surface mount package. This non-volatile memory device operates at 1 MHz clock frequency with 550 ns access time and supports supply voltages from 1.8V to 5.5V across the industrial temperature range of -40°C to 85°C. The part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 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	SOT-23-5 (SC-74A, SOT-753)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the FT24C02A-5LR-T is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Parametric Equivalents):

Memory Size: 2Kbit
Memory Organization: 256 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 (minimum)
Operating Temperature: -40°C ~ 85°C (minimum)
Package: SOT-23-5
Mounting Type: Surface Mount

Secondary Substitution Criteria (Similar Parts): Parts meeting all primary criteria except Clock Frequency (400 kHz instead of 1 MHz) and Access Time (900 ns instead of 550 ns) are classified as similar substitutes. These maintain full functional compatibility in I2C EEPROM applications where the reduced clock frequency and longer access time are acceptable.

Packaging Variants: Fremont Micro Devices FT24C02A series includes packaging variants (Tape & Reel, Cut Tape & Digi-Reel) that are direct parametric equivalents with identical electrical specifications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Product Status
FT24C02A-5LR-T	Fremont Micro Devices	2Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Discontinued
FT24C02A-FLR-T	Fremont Micro Devices	2Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Active
FT24C02A-KLR-T	Fremont Micro Devices	2Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Active
24AA02HT-I/OT	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Active
24AA02T-I/OT	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Active
24LC02BHT-E/OT	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	SOT-23-5	Active
24LC02BHT-I/OT	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Active
24LC02BT-E/OT	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	SOT-23-5	Active
24LC02BT-I/OT	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Active
AT24C02C-STUM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Active
AT24CS02-STUM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	SOT-23-5	Active

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacements):

FT24C02A-FLR-T and FT24C02A-KLR-T are parametric equivalents of the discontinued FT24C02A-5LR-T. Both parts maintain identical electrical specifications and differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel). Both are ROHS3 compliant with MSL rating 1 and active product status. Selection between these variants depends on procurement and assembly requirements.

High-Performance Alternatives (1 MHz Operation):

AT24C02C-STUM-T and AT24CS02-STUM-T from Microchip Technology provide 1 MHz clock frequency and 550 ns access time matching the original FT24C02A-5LR-T specifications. Both are ROHS3 compliant with MSL rating 1 and active product status. AT24C02C-STUM-T supports supply voltage from 1.7V to 5.5V. Both operate across -40°C to 85°C temperature range in SOT-23-5 package.

Standard-Speed Alternatives (400 kHz Operation):

Microchip Technology 24AA02 and 24LC02 series parts operate at 400 kHz clock frequency with 900 ns access time. These are suitable for applications where reduced clock speed is acceptable. The 24AA02HT-I/OT and 24AA02T-I/OT support 1.7V to 5.5V supply voltage. The 24LC02BHT and 24LC02BT variants support 2.5V to 5.5V supply voltage with extended temperature operation to 125°C. All are ROHS3 compliant with MSL rating 1 and active product status.

Frequently Asked Questions (FAQ)

Q: Can FT24C02A-FLR-T and FT24C02A-KLR-T be used interchangeably with FT24C02A-5LR-T?

A: Yes. FT24C02A-FLR-T and FT24C02A-KLR-T are parametric equivalents with identical electrical and mechanical specifications. The difference is packaging format: FLR-T uses Tape & Reel, while KLR-T uses Cut Tape & Digi-Reel. Selection depends on assembly line requirements and procurement preferences.

Q: What is the difference between 1 MHz and 400 kHz clock frequency variants?

A: Clock frequency determines the maximum I2C bus speed. The 1 MHz variants (FT24C02A, AT24C02C, AT24CS02) support faster data transfer with 550 ns access time. The 400 kHz variants (24AA02, 24LC02) operate at reduced speed with 900 ns access time. Both are functionally compatible with standard I2C protocols; selection depends on system timing requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed are ROHS3 compliant with MSL rating 1 (Unlimited moisture sensitivity level). All are REACH unaffected and classified as EAR99 for export control purposes.

Q: What is the significance of the voltage supply range difference between 1.8V and 1.7V minimum?

A: FT24C02A-5LR-T supports 1.8V to 5.5V. Microchip AT24C02C and AT24CS02 support 1.7V to 5.5V, providing slightly lower minimum voltage operation. The 24LC02 series supports 2.5V to 5.5V minimum. Selection depends on system power supply specifications.

Q: Can 24LC02BT-E/OT be used in applications requiring -40°C to 85°C operation?

A: 24LC02BT-E/OT is rated for -40°C to 125°C operation, which exceeds the -40°C to 85°C requirement. It is suitable for this application. However, verify that the 2.5V minimum supply voltage meets your system requirements, as FT24C02A-5LR-T supports operation down to 1.8V.

Q: What packaging options are available for the substitute parts?

A: All substitute parts use SOT-23-5 surface mount package (SC-74A, SOT-753 designations). Packaging format variants include Tape & Reel (TR) and Cut Tape & Digi-Reel (CT). Verify specific packaging availability with your supplier based on assembly requirements.

Q: Are there any programmability differences between substitute parts?

A: DiGi-Electronics Programmable status varies. 24AA02T-I/OT and 24LC02BT-E/OT are verified as programmable. Other parts show "Not Verified" status. This designation relates to supplier programming services and does not affect standard I2C EEPROM functionality in your application.

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