Equivalent & Substitute Parts for 24FC515-I/SM

Part Overview

The 24FC515-I/SM is a 512Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 1 MHz clock frequency and 400 ns access time in an 8-SOIJ surface mount package. This part is active in production with verified programmability status and full ROHS3 compliance. Substitute parts are identified based on matching memory capacity, interface protocol, package compatibility, and electrical operating parameters to ensure functional equivalence in system applications.

Key Parameters

Parameter	24FC515-I/SM
Memory Size	512Kbit
Memory Organization	64K x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	400 ns
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24FC515-I/SM is determined by the following critical parameters:

Primary Matching Criteria:

Memory capacity: 512Kbit
Memory organization: 64K x 8
Interface protocol: I2C
Package type: 8-SOIC/8-SOIJ form factor
Mounting: Surface mount

Secondary Compatibility Factors:

Clock frequency: 1 MHz operation capability
Access time: 400 ns or faster
Supply voltage range: Must encompass 2.5V ~ 5.5V minimum
Operating temperature: Must support -40°C ~ 85°C minimum
Write cycle time: 5ms or faster

Substitute parts are grouped into two categories: direct Microchip Technology equivalents within the same product family, and cross-manufacturer alternatives from onsemi and STMicroelectronics that meet all electrical and mechanical specifications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Write Cycle
24FC515-I/SM	Microchip	512Kbit	1 MHz	400 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIJ	5ms
24AA512-I/SM	Microchip	512Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIJ	5ms
24FC512-I/SM	Microchip	512Kbit	1 MHz	400 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIJ	5ms
24LC512-E/SM	Microchip	512Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIJ	5ms
24LC512-I/SM	Microchip	512Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIJ	5ms
24LC515-I/SM	Microchip	512Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIJ	5ms
AT24C512C-SHD-B	Microchip	512Kbit	1 MHz	550 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIJ	5ms
CAT24C512XI-T2	onsemi	512Kbit	1 MHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	5ms
CAV24C512WE-GT3	onsemi	512Kbit	1 MHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	5ms
M24512-DRMN3TP/K	STMicroelectronics	512Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 125°C	8-SOIC	4ms
M24512-DRMN8TP/K	STMicroelectronics	512Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 105°C	8-SOIC	4ms

Engineering Selection Recommendations

Microchip Technology Direct Equivalents: 24FC512-I/SM provides identical electrical performance to the 24FC515-I/SM with 1 MHz operation and 400 ns access time, with extended lower voltage support (1.7V minimum). This part is recommended as the primary substitute when supply voltage range flexibility is required. Both parts maintain ROHS3 compliance and verified programmability status.

Microchip Technology Functional Alternatives: 24AA512-I/SM, 24LC512-I/SM, and 24LC515-I/SM operate at reduced clock frequency (400 kHz) with slower access time (900 ns) but maintain full compatibility with 2.5V ~ 5.5V supply range and -40°C ~ 85°C operating temperature. These parts are suitable for applications where maximum clock frequency is not a system requirement. 24LC512-E/SM extends operating temperature to 125°C while maintaining identical electrical specifications to 24LC512-I/SM.

Cross-Manufacturer Alternatives: CAT24C512XI-T2 (onsemi) and M24512-DRMN3TP/K (STMicroelectronics) both support 1 MHz operation with access times of 900 ns and 450 ns respectively. Both parts are ROHS3 compliant. M24512-DRMN3TP/K includes AEC-Q100 automotive qualification and supports extended temperature range to 125°C. CAV24C512WE-GT3 (onsemi) is automotive-qualified with AEC-Q100 certification and 125°C operating temperature support.

Package Consideration: Microchip parts use 8-SOIJ packaging (0.209", 5.30mm width). onsemi and STMicroelectronics alternatives use 8-SOIC packaging (0.154", 3.90mm width). Both package types are mechanically compatible in standard 8-pin SOIC footprints, though PCB layout verification is required for the narrower 3.90mm width variants.

Frequently Asked Questions (FAQ)

Q: Can 24AA512-I/SM replace 24FC515-I/SM in all applications? A: 24AA512-I/SM is functionally compatible but operates at 400 kHz clock frequency versus 1 MHz for the 24FC515-I/SM. Substitution is valid only when system timing requirements do not mandate 1 MHz I2C operation. Both parts share identical 512Kbit capacity, 64K x 8 organization, and 5ms write cycle time.

Q: What is the difference between 24LC512-E/SM and 24LC512-I/SM? A: Both parts are electrically identical with 400 kHz clock frequency and 900 ns access time. The primary difference is operating temperature range: 24LC512-E/SM supports -40°C ~ 125°C while 24LC512-I/SM supports -40°C ~ 85°C. Select 24LC512-E/SM for applications requiring extended high-temperature operation.

Q: Are onsemi CAT24C512XI-T2 and STMicroelectronics M24512-DRMN3TP/K direct replacements? A: Both parts support 1 MHz I2C operation and 512Kbit capacity with ROHS3 compliance. CAT24C512XI-T2 has 900 ns access time while M24512-DRMN3TP/K has 450 ns access time. M24512-DRMN3TP/K includes AEC-Q100 automotive qualification. Package width differs: CAT24C512XI-T2 uses standard 5.30mm width while M24512-DRMN3TP/K uses 3.90mm width. Verify PCB footprint compatibility before selection.

Q: Why would I choose an automotive-qualified part like CAV24C512WE-GT3? A: CAV24C512WE-GT3 carries AEC-Q100 automotive qualification and supports extended operating temperature to 125°C. Select this part for automotive applications, industrial environments with elevated temperature requirements, or systems requiring documented automotive-grade component traceability.

Q: What is the voltage supply compatibility range across all substitutes? A: The 24FC515-I/SM requires 2.5V ~ 5.5V. Microchip 24FC512-I/SM and onsemi CAT24C512XI-T2 support lower minimum voltage (1.7V and 1.8V respectively). STMicroelectronics M24512 series also supports 1.8V minimum. Verify system supply voltage against each part's specification before substitution.

Q: Can I use M24512-DRMN8TP/K instead of M24512-DRMN3TP/K? A: Both parts are electrically identical with 1 MHz operation, 450 ns access time, and 4ms write cycle time. The difference is operating temperature range: M24512-DRMN3TP/K supports -40°C ~ 125°C while M24512-DRMN8TP/K supports -40°C ~ 105°C. Select based on maximum operating temperature requirement.

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