24LC32AFT-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC32AFT-E/SN is a 32Kbit I2C EEPROM memory IC manufactured by Microchip Technology, packaged in 8-SOIC surface mount configuration. 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 device is ROHS3 compliant and carries MSL Level 1 rating. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, electrical specifications, and package compatibility to ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	Value
Memory Size	32Kbit
Memory Organization	4K 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 Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 24LC32AFT-E/SN are classified based on the following substitution criteria:

Direct Manufacturer Equivalents match all critical electrical and mechanical parameters: 32Kbit memory capacity, 4K x 8 organization, I2C interface at 400 kHz, 900 ns access time, 5ms write cycle time, 2.5V–5.5V supply range, -40°C to 125°C operating temperature, and 8-SOIC package with 3.90mm width.

Parametric Equivalents maintain identical memory specifications and I2C interface but may differ in packaging format (tape & reel versus tube) or include additional programmable verification status. These parts are functionally equivalent for circuit design purposes.

Manufacturer Recommended Alternatives from Rohm Semiconductor and STMicroelectronics provide 32Kbit I2C EEPROM functionality with compatible memory organization and interface. These parts may feature enhanced specifications such as higher clock frequency (1 MHz), faster access time (450 ns), or extended automotive qualification (AEC-Q100), while maintaining core compatibility through matching memory capacity and I2C protocol.

Key Substitution Parameters:

Memory capacity: 32Kbit
Memory organization: 4K x 8
Interface protocol: I2C
Package type: 8-SOIC or 8-SOP variants
Supply voltage compatibility
Operating temperature range overlap

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Write Cycle	Voltage Supply	Operating Temp	Package	Inventory
24LC32AFT-E/SN	Microchip	32Kbit	400 kHz	900 ns	5ms	2.5V–5.5V	-40°C–125°C	8-SOIC (3.90mm)	2100 Pcs
24LC32AF-E/SN	Microchip	32Kbit	400 kHz	900 ns	5ms	2.5V–5.5V	-40°C–125°C	8-SOIC (3.90mm)	2320 Pcs
24LC32AT-E/SN	Microchip	32Kbit	400 kHz	900 ns	5ms	2.5V–5.5V	-40°C–125°C	8-SOIC (3.90mm)	6677 Pcs
BR24A32F-WME2	Rohm	32Kbit	400 kHz	—	5ms	2.5V–5.5V	-40°C–105°C	8-SOP (4.40mm)	5843 Pcs
BR24G32F-3GTE2	Rohm	32Kbit	400 kHz	—	5ms	1.6V–5.5V	-40°C–85°C	8-SOP (4.40mm)	3383 Pcs
BR24L32F-WE2	Rohm	32Kbit	400 kHz	—	5ms	1.8V–5.5V	-40°C–85°C	8-SOP (4.40mm)	17210 Pcs
BR24L32FJ-WE2	Rohm	32Kbit	400 kHz	—	5ms	1.8V–5.5V	-40°C–85°C	8-SOP-J (3.90mm)	7159 Pcs
M24C32-DRMN3TP/K	STMicroelectronics	32Kbit	1 MHz	450 ns	4ms	1.8V–5.5V	-40°C–125°C	8-SOIC (3.90mm)	8459 Pcs
M24C32-DRMN8TP/K	STMicroelectronics	32Kbit	1 MHz	450 ns	4ms	1.8V–5.5V	-40°C–105°C	8-SOIC (3.90mm)	20176 Pcs
CAV24C32WE-GT3	onsemi	32Kbit	400 kHz	900 ns	5ms	2.5V–5.5V	-40°C–125°C	8-SOIC (3.90mm)	6230 Pcs

Engineering Selection Recommendations

Direct Substitutes (Microchip Technology): The 24LC32AF-E/SN and 24LC32AT-E/SN are direct functional equivalents to the 24LC32AFT-E/SN. Both maintain identical electrical specifications and package dimensions. The 24LC32AT-E/SN offers higher inventory availability (6677 Pcs) and verified DiGi-Electronics programmable status, making it suitable for high-volume production requirements.

Rohm Semiconductor Alternatives: The BR24L32FJ-WE2 provides the highest inventory level (17210 Pcs) among substitute options and maintains 400 kHz I2C operation with 32Kbit capacity. The 8-SOP-J package (3.90mm width) is mechanically compatible with the original 8-SOIC footprint. However, the operating temperature range is limited to -40°C to 85°C, which restricts use in extended temperature applications. The BR24L32F-WE2 offers similar specifications with 8-SOP packaging (4.40mm width), requiring PCB layout verification for mechanical fit.

STMicroelectronics Alternatives: The M24C32-DRMN8TP/K and M24C32-DRMN3TP/K feature enhanced performance with 1 MHz I2C clock frequency and 450 ns access time, providing faster operation than the reference part. Both carry AEC-Q100 automotive qualification. The M24C32-DRMN8TP/K supports -40°C to 105°C operating range with 20176 Pcs inventory availability. The 8-SOIC package (3.90mm width) ensures direct mechanical compatibility.

onsemi Alternative: The CAV24C32WE-GT3 matches all electrical and mechanical specifications of the reference part, including 400 kHz operation, 900 ns access time, and -40°C to 125°C temperature range. AEC-Q100 automotive qualification is included. The 8-SOIC package (3.90mm width) provides direct footprint compatibility.

Selection Criteria: For applications requiring extended temperature operation (-40°C to 125°C), select from 24LC32AF-E/SN, 24LC32AT-E/SN, M24C32-DRMN3TP/K, or CAV24C32WE-GT3. For automotive-grade requirements, M24C32-DRMN8TP/K, M24C32-DRMN3TP/K, BR24A32F-WME2, and CAV24C32WE-GT3 carry AEC-Q100 qualification. For maximum inventory availability, BR24L32F-WE2 (17210 Pcs) is recommended.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 24LC32AFT-E/SN with BR24L32FJ-WE2 in my circuit?

A: The BR24L32FJ-WE2 is functionally compatible for I2C EEPROM applications requiring 32Kbit capacity and 400 kHz operation. The 8-SOP-J package (3.90mm width) matches the original footprint. However, verify that your application does not require operation above 85°C, as the BR24L32FJ-WE2 is rated only to -40°C to 85°C compared to the reference part's -40°C to 125°C range.

Q: What is the difference between the Microchip 24LC32AF-E/SN and 24LC32AT-E/SN?

A: Both parts are electrically and mechanically identical with matching 32Kbit capacity, 400 kHz I2C operation, and 8-SOIC packaging. The primary difference is packaging format: 24LC32AF-E/SN is supplied in tube packaging, while 24LC32AT-E/SN is supplied in tape & reel format. The 24LC32AT-E/SN includes verified DiGi-Electronics programmable status.

Q: Are the STMicroelectronics M24C32 parts backward compatible with the 24LC32AFT-E/SN?

A: The M24C32-DRMN8TP/K and M24C32-DRMN3TP/K are I2C EEPROM devices with 32Kbit capacity and 8-SOIC packaging, providing functional compatibility. These parts feature enhanced specifications: 1 MHz clock frequency (versus 400 kHz) and 450 ns access time (versus 900 ns). They are suitable for applications where faster I2C operation is beneficial. Both carry AEC-Q100 automotive qualification and support -40°C to 105°C or -40°C to 125°C operating ranges.

Q: Which substitute part has the best inventory availability?

A: The BR24L32F-WE2 from Rohm Semiconductor offers the highest inventory level at 17210 Pcs. This part maintains 32Kbit capacity and 400 kHz I2C operation with 8-SOP packaging (4.40mm width). Verify mechanical compatibility with your PCB layout, as the package width differs slightly from the reference part's 3.90mm specification.

Q: Can I use the CAV24C32WE-GT3 as a direct replacement?

A: Yes. The CAV24C32WE-GT3 from onsemi is a direct electrical and mechanical equivalent to the 24LC32AFT-E/SN. It maintains identical 32Kbit capacity, 400 kHz I2C operation, 900 ns access time, 2.5V–5.5V supply range, and -40°C to 125°C operating temperature. The 8-SOIC package (3.90mm width) provides direct footprint compatibility. AEC-Q100 automotive qualification is included.

Q: What should I consider when selecting between Rohm and STMicroelectronics alternatives?

A: Rohm parts (BR24L32FJ-WE2, BR24L32F-WE2) maintain 400 kHz I2C operation matching the reference part's speed. STMicroelectronics parts (M24C32-DRMN8TP/K, M24C32-DRMN3TP/K) offer faster 1 MHz operation and AEC-Q100 automotive qualification. For temperature-critical applications, verify operating range: Rohm parts are limited to -40°C to 85°C, while STMicroelectronics parts support -40°C to 105°C or -40°C to 125°C. Package dimensions also differ: Rohm 8-SOP variants are 4.40mm width, while STMicroelectronics 8-SOIC variants are 3.90mm width.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance status matching the reference part. All parts also maintain MSL Level 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status.

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