24LC64FT-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC64FT-E/SN is a 64Kbit I2C EEPROM memory IC manufactured by Microchip Technology, supplied in Tape & Reel packaging with 8-SOIC form factor. This non-volatile memory device operates at 400 kHz I2C clock frequency with 900 ns access time and supports supply voltages from 2.5V to 5.5V across an operating temperature range of -40°C to 125°C. The part is ROHS3 compliant and currently in active production status. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	24LC64FT-E/SN
Memory Size	64Kbit
Memory Organization	8K x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24LC64FT-E/SN are classified based on the following substitution criteria:

Direct Substitutes maintain identical electrical specifications: 64Kbit memory capacity, 8K x 8 organization, I2C interface at 400 kHz, 5ms write cycle time, 8-SOIC package form factor, and ROHS3 compliance. Packaging format (Tape & Reel, Tube, or Cut Tape) does not affect functional interchangeability.

Parametric Equivalents provide the same core memory specifications and I2C interface but may differ in clock frequency (up to 1 MHz), access time, supply voltage range, or operating temperature limits. These parts are functionally compatible when circuit design accommodates the specified parameter variations.

Manufacturer-Recommended Alternatives from different semiconductor manufacturers (Rohm Semiconductor, onsemi, STMicroelectronics) offer equivalent 64Kbit I2C EEPROM functionality with comparable electrical performance and package compatibility.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Product Status
24LC64FT-E/SN	Microchip Technology	64Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
24LC64F-E/SN	Microchip Technology	64Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
24LC64T-E/SN	Microchip Technology	64Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
AT24C64BN-10SU-2.7	Microchip Technology	64Kbit	400 kHz	900 ns	2.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
BR24S64FJ-WE2	Rohm Semiconductor	64Kbit	400 kHz	Not specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
BR24G64F-3GTE2	Rohm Semiconductor	64Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
BR24G64F-3AGTE2	Rohm Semiconductor	64Kbit	1 MHz	Not specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
CAT24C64WI-G	onsemi	64Kbit	1 MHz	400 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
M24C64-DFMN6TP	STMicroelectronics	64Kbit	1 MHz	450 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
M24C64-DRMN3TP/K	STMicroelectronics	64Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
M24C64-DRMN8TP/K	STMicroelectronics	64Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 105°C	8-SOIC	Active

Engineering Selection Recommendations

Direct Substitution (No Design Changes Required): 24LC64F-E/SN and 24LC64T-E/SN from Microchip Technology are direct functional equivalents with identical electrical specifications and 8-SOIC packaging. These parts differ only in packaging format (Tube and Cut Tape respectively) and do not require circuit redesign.

Compatible Substitutes (Design Verification Recommended): AT24C64BN-10SU-2.7 operates within a narrower supply voltage range (2.7V minimum vs. 2.5V) and reduced temperature range (-40°C to 85°C vs. 125°C maximum). Verify circuit supply voltage and thermal requirements before selection.

BR24S64FJ-WE2 and BR24G64F-3GTE2 from Rohm Semiconductor support lower minimum supply voltages (1.7V and 1.6V respectively) and are suitable for low-power applications. Both maintain 400 kHz I2C operation and 8-SOIC packaging.

Higher-Speed Alternatives (Clock Frequency Upgrade): BR24G64F-3AGTE2, CAT24C64WI-G, M24C64-DFMN6TP, M24C64-DRMN3TP/K, and M24C64-DRMN8TP/K operate at 1 MHz I2C clock frequency, providing faster data transfer rates. These parts are backward-compatible with 400 kHz I2C bus designs but enable higher-speed operation when circuit design permits.

Automotive-Grade Options: M24C64-DRMN3TP/K and M24C64-DRMN8TP/K carry AEC-Q100 automotive qualification and extended temperature range support (-40°C to 125°C and -40°C to 105°C respectively), suitable for automotive and industrial applications.

All substitute parts maintain ROHS3 compliance and active production status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can 24LC64F-E/SN be replaced with 24LC64T-E/SN? A: Yes. Both parts are Microchip Technology 64Kbit I2C EEPROMs with identical electrical specifications, memory organization, and 8-SOIC packaging. The difference is packaging format: 24LC64FT-E/SN uses Tape & Reel, while 24LC64T-E/SN uses Cut Tape & Digi-Reel. Functional interchangeability is complete.

Q: What is the difference between 400 kHz and 1 MHz I2C clock frequency options? A: Clock frequency determines I2C bus speed. 400 kHz is the standard I2C speed; 1 MHz (Fast-mode I2C) provides faster data transfer. Parts rated for 1 MHz (BR24G64F-3AGTE2, CAT24C64WI-G, M24C64 series) are backward-compatible with 400 kHz bus designs but enable higher-speed operation when the I2C master supports it.

Q: Are Rohm Semiconductor BR24 series parts compatible with Microchip 24LC64 designs? A: Yes, when electrical specifications align. BR24S64FJ-WE2 and BR24G64F-3GTE2 maintain 64Kbit capacity, 8K x 8 organization, I2C interface, and 8-SOIC packaging. Verify supply voltage range and operating temperature requirements match your circuit design.

Q: What does AEC-Q100 qualification mean? A: AEC-Q100 is an automotive industry qualification standard. M24C64-DRMN3TP/K and M24C64-DRMN8TP/K carry this certification, indicating suitability for automotive applications with enhanced reliability testing and extended temperature range support.

Q: Can I use a part with lower minimum supply voltage (1.6V) in a 2.5V circuit? A: Yes. Parts with lower minimum voltage ratings (BR24G64F-3GTE2 at 1.6V minimum) operate across wider voltage ranges and are compatible with circuits designed for higher voltages like 2.5V to 5.5V. The part will function correctly at any voltage within its specified range.

Q: Does package width variation (0.154" vs. 0.173") affect PCB compatibility? A: Package width differences between standard 8-SOIC (0.154", 3.90mm) and wider variants (0.173", 4.40mm) may affect PCB footprint compatibility. Verify footprint dimensions before substitution. Most 24LC64 variants use standard 0.154" width 8-SOIC packaging.

Q: What is Moisture Sensitivity Level (MSL)? A: MSL indicates moisture absorption sensitivity during storage and handling. MSL 1 (Unlimited) means the part has no moisture sensitivity restrictions. MSL 3 (168 Hours) requires controlled storage conditions. AT24C64BN-10SU-2.7 has MSL 3; all other listed parts have MSL 1.

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