Equivalent & Substitute Parts for 24LC64F-I/MS

Part Overview

The 24LC64F-I/MS is a 64Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface communication at 400 kHz with 900 ns access time. The device is packaged in 8-MSOP surface mount configuration and operates across a supply voltage range of 2.5V to 5.5V with temperature range of -40°C to 85°C. This part is currently Active in product status and ROHS3 compliant.

Substitute parts are identified when equivalent or superior electrical and mechanical parameters are available from the same or alternative manufacturers. Substitution becomes necessary due to inventory availability, extended temperature range requirements, improved performance specifications, or alternative packaging options while maintaining functional compatibility.

Key Parameters

Parameter	24LC64F-I/MS
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 ~ 85°C
Package Type	8-MSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are classified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Memory Size: 64Kbit (fixed requirement)
Memory Organization: 8K x 8 (fixed requirement)
Memory Interface: I2C (fixed requirement)
Write Cycle Time: 5ms (fixed requirement)
Package Type: 8-MSOP or 8-TSSOP (mechanically compatible)
Mounting Type: Surface Mount (fixed requirement)

Secondary Variation Parameters (allow substitution):

Clock Frequency: 400 kHz or 1 MHz (higher frequency is backward compatible)
Access Time: 900 ns or 400 ns (faster access is backward compatible)
Voltage Supply Range: 2.5V ~ 5.5V or 1.7V ~ 5.5V (wider range is backward compatible)
Operating Temperature: -40°C ~ 85°C or -40°C ~ 125°C (extended range is backward compatible)
Manufacturer: Microchip Technology or Rohm Semiconductor (both ROHS3 compliant)

Substitutes are grouped into three categories: MFR Recommended (manufacturer-approved alternatives), Parametric Equivalents (identical electrical specifications), and Alternative Manufacturers (functionally compatible from different sources).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Product Status
24LC64F-I/MS	Microchip Technology	64Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24AA64-E/MS	Microchip Technology	64Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-MSOP	Active
24AA64-I/MS	Microchip Technology	64Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24AA64F-I/MS	Microchip Technology	64Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24FC64-I/MS	Microchip Technology	64Kbit	1 MHz	400 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24FC64F-I/MS	Microchip Technology	64Kbit	1 MHz	400 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24LC64-E/MS	Microchip Technology	64Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-MSOP	Active
24LC64T-I/ST	Microchip Technology	64Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24LC64-I/MS	Microchip Technology	64Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
BR24G64FVM-3GTTR	Rohm Semiconductor	64Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
BR24T64FVJ-WE2	Rohm Semiconductor	64Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not For New Designs

Engineering Selection Recommendations

Direct Parametric Equivalents (Identical Specifications): The 24LC64-I/MS is a direct parametric equivalent to the 24LC64F-I/MS, sharing identical electrical and mechanical specifications including 400 kHz clock frequency, 900 ns access time, 2.5V to 5.5V supply voltage range, and -40°C to 85°C operating temperature in 8-MSOP packaging. Both parts are Active status and ROHS3 compliant.

MFR Recommended Substitutes with Extended Voltage Range: The 24AA64-E/MS and 24AA64-I/MS offer extended lower voltage operation (1.7V minimum) compared to the main part (2.5V minimum), providing greater flexibility in low-power applications. The 24AA64-E/MS additionally supports extended operating temperature to 125°C. Both maintain 400 kHz clock frequency and 900 ns access time in 8-MSOP packaging with Active product status.

MFR Recommended Substitutes with Extended Temperature Range: The 24LC64-E/MS maintains identical electrical specifications to the main part but extends operating temperature to -40°C to 125°C, suitable for applications requiring wider temperature operation. This part is Active status and ROHS3 compliant in 8-MSOP packaging.

Performance-Enhanced Substitutes: The 24FC64-I/MS and 24FC64F-I/MS offer improved performance with 1 MHz clock frequency and 400 ns access time (2.25x faster access), while maintaining 64Kbit capacity and I2C interface. These parts support extended lower voltage (1.7V minimum) and are Active status in 8-MSOP packaging. The faster access time is backward compatible with systems designed for 900 ns operation.

Alternative Packaging Option: The 24LC64T-I/ST provides identical electrical specifications in 8-TSSOP packaging (0.173" width) instead of 8-MSOP (0.118" width), available in Cut Tape and Digi-Reel packaging format. This option is suitable when alternative packaging format is required while maintaining electrical compatibility.

Alternative Manufacturer Substitutes: The BR24G64FVM-3GTTR from Rohm Semiconductor provides 64Kbit I2C EEPROM with 400 kHz clock frequency in 8-MSOP packaging. This part supports extended lower voltage operation (1.6V minimum) and is ROHS3 compliant. However, DiGi-Electronics programmability is not verified for this part.

Not Recommended for New Designs: The BR24T64FVJ-WE2 is classified as Not For New Designs and should not be selected for new applications despite functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute 24LC64F-I/MS with 24LC64-I/MS? A: Yes. The 24LC64-I/MS is a direct parametric equivalent with identical memory size (64Kbit), interface (I2C), clock frequency (400 kHz), access time (900 ns), voltage range (2.5V ~ 5.5V), temperature range (-40°C ~ 85°C), and 8-MSOP packaging. Both are Active status and ROHS3 compliant.

Q: What is the difference between 24AA64 and 24LC64 series? A: The primary difference is voltage supply range. The 24AA64 series supports extended lower voltage operation (1.7V minimum) compared to 24LC64 series (2.5V minimum). Both maintain identical memory capacity, I2C interface, and clock frequency specifications. The 24AA64 series is suitable for low-power applications.

Q: Can I use 24FC64-I/MS as a direct replacement? A: The 24FC64-I/MS is functionally compatible but offers enhanced performance with 1 MHz clock frequency and 400 ns access time compared to the main part's 400 kHz and 900 ns. The faster specifications are backward compatible with systems designed for the slower 24LC64F-I/MS. Extended lower voltage support (1.7V minimum) is an additional benefit.

Q: What is the difference between 8-MSOP and 8-TSSOP packaging? A: Both are 8-pin surface mount packages with identical pin configurations and electrical compatibility. The 8-MSOP package has 0.118" width (3.00mm), while 8-TSSOP has 0.173" width (4.40mm). Selection depends on PCB layout constraints and available board space. The 24LC64T-I/ST provides 8-TSSOP option with identical electrical specifications.

Q: Are Rohm Semiconductor BR24G64FVM-3GTTR and BR24T64FVJ-WE2 suitable replacements? A: The BR24G64FVM-3GTTR is functionally compatible with 64Kbit capacity, I2C interface, and 400 kHz clock frequency in 8-MSOP packaging. However, DiGi-Electronics programmability is not verified. The BR24T64FVJ-WE2 is classified as Not For New Designs and should not be selected for new applications.

Q: Which substitute offers the widest operating temperature range? A: The 24AA64-E/MS and 24LC64-E/MS both support -40°C to 125°C operating temperature, extending 40°C above the main part's -40°C to 85°C range. The 24AA64-E/MS additionally provides extended lower voltage operation (1.7V minimum).

Q: Can I use a substitute with lower minimum voltage requirement? A: Yes. Substitutes with lower minimum voltage (1.7V or 1.6V) are backward compatible with systems designed for 2.5V minimum operation. The lower voltage capability provides additional flexibility without compromising compatibility with higher voltage applications.

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