BR24C64-MN6TP EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The BR24C64-MN6TP is a 64Kbit I2C EEPROM memory IC manufactured by Rohm Semiconductor in 8-SOIC surface mount packaging. This device operates at 400 kHz clock frequency with a supply voltage range of 4.5V to 5.5V and is rated for -40°C to 85°C operating temperature. The part is currently in Last Time Buy status, indicating production discontinuation. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain component availability for ongoing production and maintenance requirements.

Key Parameters

Parameter	Value
Memory Size	64Kbit
Memory Organization	8K x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Write Cycle Time	5ms
Voltage Supply Range	4.5V ~ 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

Substitution of the BR24C64-MN6TP is determined by strict alignment of the following critical parameters:

Core Compatibility Requirements:

Memory capacity: 64Kbit
Memory organization: 8K x 8
Interface protocol: I2C
Package type: 8-SOIC (0.154", 3.90mm Width)
Write cycle time: 5ms
Operating temperature range: -40°C to 85°C minimum

Voltage Supply Consideration: The BR24C64-MN6TP operates within 4.5V to 5.5V. Substitute parts with wider voltage ranges (1.6V to 5.5V or 1.7V to 5.5V) are compatible as they encompass the original operating window. Parts with narrower voltage ranges below 4.5V minimum are not suitable.

Clock Frequency Flexibility: The original part operates at 400 kHz. Substitute parts operating at 1 MHz or higher clock frequencies are functionally compatible, as they support the original 400 kHz operation mode. Parts with lower clock frequencies are not acceptable.

Packaging Variants: The original 8-SOP packaging is equivalent to 8-SOIC and 8-SOP-J variants, all maintaining the same 0.154" width and 3.90mm dimensions. These are mechanically and electrically interchangeable.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Voltage Supply	Operating Temp	Package	Product Status	Inventory
BR24C64-MN6TP	Rohm Semiconductor	64Kbit	400 kHz	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOP	Last Time Buy	739 Pcs
BR24G64FJ-5E2	Rohm Semiconductor	64Kbit	1 MHz	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active	3498 Pcs
BR24G64FJ-3AGTE2	Rohm Semiconductor	64Kbit	1 MHz	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active	1600 Pcs
BR24G64FJ-3GTE2	Rohm Semiconductor	64Kbit	400 kHz	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active	92800 Pcs
BR24L64FJ-WE2	Rohm Semiconductor	64Kbit	400 kHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active	2373 Pcs
BR24S64FJ-WE2	Rohm Semiconductor	64Kbit	400 kHz	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active	24805 Pcs
BR24T64FJ-WE2	Rohm Semiconductor	64Kbit	400 kHz	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active	4912 Pcs
24AA64FT-I/SN	Microchip Technology	64Kbit	400 kHz	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	7164 Pcs
24AA64T-E/SN	Microchip Technology	64Kbit	400 kHz	1.7V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active	2096 Pcs
24AA64T-I/SN	Microchip Technology	64Kbit	400 kHz	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	15585 Pcs
24AA64T-I/SNG	Microchip Technology	64Kbit	400 kHz	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	1069 Pcs

Engineering Selection Recommendations

Primary Substitutes (Rohm Semiconductor BR24 Series):

BR24G64FJ-3GTE2 and BR24S64FJ-WE2 are direct functional equivalents with identical 400 kHz clock frequency and 5ms write cycle time. Both are in Active product status with substantial inventory availability (92800 Pcs and 24805 Pcs respectively). BR24G64FJ-3GTE2 offers unlimited moisture sensitivity rating (MSL 1), while BR24S64FJ-WE2 is verified as DiGi-Electronics Programmable. Both support the full 4.5V to 5.5V operating window of the original part.

BR24L64FJ-WE2 and BR24T64FJ-WE2 provide equivalent functionality at 400 kHz with Active status. BR24L64FJ-WE2 is DiGi-Electronics Programmable verified. Both maintain the required electrical and thermal specifications.

BR24G64FJ-5E2 and BR24G64FJ-3AGTE2 operate at 1 MHz, providing higher clock frequency capability while maintaining backward compatibility with 400 kHz applications. Both are Active status with good inventory levels.

Secondary Substitutes (Microchip Technology 24AA64 Series):

24AA64T-I/SN is the highest inventory option (15585 Pcs) among Microchip alternatives, with Active status and DiGi-Electronics Programmable verification. It matches the original 400 kHz clock frequency and 5ms write cycle time.

24AA64T-E/SN extends the operating temperature range to -40°C to 125°C, providing enhanced thermal capability beyond the original specification while maintaining all other electrical parameters.

24AA64FT-I/SN and 24AA64T-I/SNG provide additional sourcing options with Active status and full parameter compatibility.

All substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can BR24G64FJ-3GTE2 replace BR24C64-MN6TP directly?

A: Yes. Both parts share identical 64Kbit capacity, 8K x 8 organization, I2C interface, 400 kHz clock frequency, 5ms write cycle time, and 8-SOIC package dimensions. The BR24G64FJ-3GTE2 operates within the original 4.5V to 5.5V window and maintains the same -40°C to 85°C temperature range. The packaging variant (8-SOP-J vs 8-SOP) is mechanically equivalent.

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

A: The 1 MHz variants (BR24G64FJ-5E2, BR24G64FJ-3AGTE2) support higher data transfer rates but are backward compatible with 400 kHz applications. If the original design operates at 400 kHz, both 400 kHz and 1 MHz parts function identically in that application. The 1 MHz parts provide additional performance headroom for future designs.

Q: Are Microchip 24AA64 parts compatible with Rohm BR24 parts?

A: Yes, within the specified parameters. Both manufacturers produce 64Kbit I2C EEPROMs with identical memory organization, interface protocol, write cycle time, and package dimensions. Electrical and thermal specifications overlap sufficiently for direct substitution in applications operating within the common parameter ranges.

Q: Does voltage supply range affect substitution?

A: The original BR24C64-MN6TP requires 4.5V to 5.5V operation. Substitute parts with wider ranges (1.6V to 5.5V or 1.7V to 5.5V) are fully compatible as they encompass the original window. Parts with minimum voltage below 4.5V do not restrict substitution if the application supplies 4.5V or higher. Verify your circuit's actual supply voltage against the substitute part's minimum specification.

Q: What is the significance of Product Status (Last Time Buy vs Active)?

A: Last Time Buy status indicates the BR24C64-MN6TP is discontinued. Active status parts are in current production with ongoing availability. For new designs or long-term production, Active status substitutes ensure sustained component supply and manufacturing support.

Q: Can I use 24AA64T-E/SN with extended temperature range (-40°C to 125°C)?

A: Yes. The extended temperature range is a superset of the original -40°C to 85°C specification. If your application operates within -40°C to 85°C, the 24AA64T-E/SN functions identically to the original part. The extended range provides additional margin for thermal stress conditions.

Q: Are there packaging considerations between 8-SOP and 8-SOIC variants?

A: No. The 8-SOP, 8-SOP-J, and 8-SOIC designations refer to the same physical package with 0.154" width and 3.90mm dimensions. These are mechanically and electrically interchangeable on standard PCB layouts designed for 8-pin SOIC packages.

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