FT24C02A-USR-B EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The FT24C02A-USR-B is a 2Kbit I2C EEPROM memory IC manufactured by Fremont Micro Devices Ltd, designed for non-volatile data storage applications requiring I2C serial communication. The 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. This part is currently in active production status with 837 units in stock. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional compatibility in system designs.

Key Parameters

Parameter	FT24C02A-USR-B
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	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the FT24C02A-USR-B are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Identical Operating Parameters): Parts that match all critical parameters including 1 MHz clock frequency, 550 ns access time, 1.8V minimum supply voltage, and 8-SOIC package footprint. These parts are pin-compatible and functionally equivalent with no design modifications required.

Similar Substitutes (Compatible with Design Considerations): Parts that maintain 2Kbit capacity, 256 x 8 organization, I2C interface, and 8-SOIC package but operate at reduced clock frequency (400 kHz) or different supply voltage minimums (1.7V or 2.5V). These parts are electrically compatible but require verification of timing requirements in the target application.

Critical Parameters for Substitution:

Memory capacity: 2Kbit (256 x 8)
Interface protocol: I2C serial communication
Package footprint: 8-SOIC with 0.154" or 0.173" width variants
Supply voltage overlap with 1.8V ~ 5.5V range
Operating temperature range: -40°C ~ 85°C minimum
Write cycle time: 5 ms

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Inventory
FT24C02A-USR-B	Fremont Micro Devices	2Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC (3.90mm)	837 Pcs
AT24HC02C-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC (3.90mm)	1488 Pcs
24AA02-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC (3.90mm)	36647 Pcs
24AA024-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC (3.90mm)	1322 Pcs
24AA02H-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC (3.90mm)	1535 Pcs
AT24CS02-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC (3.90mm)	3850 Pcs
AT24HC02C-SSHM-B	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC (3.90mm)	2200 Pcs
BR24A02F-WME2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	2.5V ~ 5.5V	-40°C ~ 105°C	8-SOIC (4.40mm)	2700 Pcs
BR24G02F-3GTE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC (4.40mm)	2880 Pcs
BR24G02FJ-3GTE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC (3.90mm)	24840 Pcs
BR24L02F-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC (4.40mm)	39785 Pcs

Engineering Selection Recommendations

Direct Substitutes (No Design Modification Required):

AT24HC02C-SSHM-T and AT24CS02-SSHM-T from Microchip Technology are direct functional equivalents. Both maintain 1 MHz clock frequency and 550 ns access time specifications. AT24HC02C-SSHM-T offers higher inventory availability (1488 units) and is supplied in Cut Tape & Digi-Reel packaging. Both parts are ROHS3 compliant and maintain the -40°C to 85°C operating temperature range. AT24HC02C-SSHM-B provides the same electrical specifications in bulk packaging format with 2200 units available.

Compatible Substitutes (Timing Verification Required):

24AA02-I/SN, 24AA024-I/SN, and 24AA02H-I/SN operate at 400 kHz clock frequency with 900 ns access time, representing reduced performance compared to the FT24C02A-USR-B. These parts are suitable for applications where lower I2C bus speeds are acceptable. All three maintain 1.7V minimum supply voltage and -40°C to 85°C operating range. The 24AA02-I/SN has the highest inventory (36647 units) and is verified as programmable by DiGi-Electronics.

Extended Temperature Range Option:

BR24A02F-WME2 from Rohm Semiconductor extends the operating temperature range to -40°C to 105°C and includes AEC-Q100 automotive qualification. This part operates at 400 kHz and requires minimum 2.5V supply voltage, making it suitable for automotive applications where higher temperature operation is required.

Low Voltage Option:

BR24G02F-3GTE2 and BR24G02FJ-3GTE2 support supply voltages as low as 1.6V, providing flexibility for battery-powered or low-voltage applications. BR24G02FJ-3GTE2 maintains the 3.90mm package width matching the original part footprint and offers the highest inventory (24840 units).

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original FT24C02A-USR-B specification.

Frequently Asked Questions (FAQ)

Q: Can I use a 400 kHz I2C EEPROM as a direct replacement for the 1 MHz FT24C02A-USR-B?

A: 400 kHz parts are electrically compatible but operate at reduced bus speed. Substitution is valid only if the application does not require 1 MHz I2C communication. The slower access time (900 ns vs 550 ns) must be verified against system timing requirements. If the I2C master is configured for 400 kHz operation, these parts function identically to the original.

Q: What is the difference between 8-SOIC packages with 3.90mm and 4.40mm widths?

A: Both package variants are 8-pin SOIC configurations with identical pin pitch and electrical compatibility. The width difference reflects different lead frame designs. The 3.90mm width (BR24G02FJ-3GTE2) matches the original FT24C02A-USR-B footprint exactly. The 4.40mm width variants (BR24A02F-WME2, BR24G02F-3GTE2, BR24L02F-WE2) require PCB layout verification to confirm clearance and trace routing compatibility.

Q: Are there supply voltage compatibility issues between the FT24C02A-USR-B and substitute parts?

A: The FT24C02A-USR-B operates from 1.8V to 5.5V. Most Microchip substitutes (AT24HC02C, AT24CS02, 24AA series) operate from 1.7V minimum, providing full compatibility. Rohm BR24A02F-WME2 requires 2.5V minimum, which is compatible with standard 3.3V and 5V systems but not suitable for 1.8V applications. BR24G02F and BR24G02FJ variants support 1.6V minimum, providing the widest voltage compatibility.

Q: Which substitute part has the best inventory availability?

A: BR24L02F-WE2 from Rohm Semiconductor has the highest inventory at 39785 units. This part operates at 400 kHz with 1.8V to 5.5V supply range and is verified as programmable. For 1 MHz operation matching the original specification, AT24CS02-SSHM-T offers 3850 units in stock.

Q: Do all substitute parts maintain the same write cycle time?

A: Yes, all listed substitute parts maintain the 5 ms write cycle time specification, ensuring compatibility with firmware and software timing routines designed for the FT24C02A-USR-B.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL 1 (Unlimited) indicates no moisture sensitivity and no special storage or handling requirements. MSL 3 (168 Hours) requires controlled humidity storage and has a limited shelf life after packaging opening. The AT24HC02C-SSHM-T carries MSL 3, while most other substitutes carry MSL 1. For high-volume production or long-term inventory, MSL 1 parts are preferred.

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