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

Part Overview

The 24LC32AFT-I/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 the industrial temperature range of -40°C to 85°C. The part is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). 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 ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

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

Direct Substitutes maintain identical electrical specifications: 32Kbit memory capacity, I2C interface, 400 kHz clock frequency, 900 ns access time, 2.5V–5.5V supply voltage range, and 8-SOIC package. These parts differ only in packaging format (Cut Tape vs. Tube vs. Tape & Reel) or minor device designations within the same product line.

Manufacturer Recommended Substitutes from Microchip Technology offer compatible core functionality with allowable variations in supply voltage range, operating temperature, or clock frequency. These maintain the same 32Kbit capacity, I2C interface, 8-SOIC package, and ROHS3 compliance.

Cross-Manufacturer Substitutes from Rohm Semiconductor provide equivalent 32Kbit I2C EEPROM functionality with compatible electrical and thermal specifications. Package dimensions may vary slightly (8-SOP vs. 8-SOP-J) while maintaining surface mount compatibility.

Parametric Equivalents match all critical electrical parameters but may have different device designations or internal part numbering within the same manufacturer family.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Supply Voltage	Operating Temp	Package	Packaging Format
24LC32AFT-I/SN	Microchip	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel
24LC32AF-I/SN	Microchip	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Tube
24AA32AT-I/SN	Microchip	32Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel
24LC32AT-E/SN	Microchip	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Cut Tape & Digi-Reel
AT24CS32-SSHM-T	Microchip	32Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel
24LC32AT-I/SN	Microchip	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel
BR24A32F-WME2	Rohm	32Kbit	400 kHz	—	2.5V ~ 5.5V	-40°C ~ 105°C	8-SOP	Tape & Reel
BR24G32F-3GTE2	Rohm	32Kbit	400 kHz	—	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP	Tape & Reel
BR24G32FJ-3AGTE2	Rohm	32Kbit	1 MHz	—	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Tape & Reel
BR24G32FJ-3GTE2	Rohm	32Kbit	400 kHz	—	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Tape & Reel
BR24L32F-WE2	Rohm	32Kbit	400 kHz	—	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOP	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Microchip Technology Direct Substitutes (24LC32AF-I/SN, 24LC32AT-I/SN): These parts are functionally identical to the 24LC32AFT-I/SN with matching electrical specifications and ROHS3 compliance. Selection depends on packaging format availability and inventory requirements. The 24LC32AT-I/SN is verified for DiGi-Electronics programmability and offers the highest inventory availability (33,100 units).

Extended Supply Voltage Range (24AA32AT-I/SN): Supports lower minimum supply voltage (1.8V vs. 2.5V) while maintaining all other specifications. Suitable for applications requiring operation at reduced supply levels. DiGi-Electronics programmability verified.

Extended Temperature Range (24LC32AT-E/SN): Rated to 125°C maximum operating temperature compared to 85°C for the main part. Applicable for high-temperature industrial environments. Maintains 2.5V–5.5V supply range and 400 kHz I2C operation.

Higher Clock Frequency (AT24CS32-SSHM-T): Operates at 1 MHz I2C clock with 550 ns access time, providing faster data transfer capability. Supports 1.7V–5.5V supply range. Moisture sensitivity level MSL 3 (168 hours) differs from MSL 1 of the main part.

Rohm Semiconductor Cross-Manufacturer Options: BR24 series parts provide equivalent 32Kbit I2C EEPROM functionality with ROHS3 compliance. Package variants include 8-SOP and 8-SOP-J configurations. BR24A32F-WME2 includes AEC-Q100 automotive qualification and extended temperature range to 105°C. BR24L32F-WE2 offers verified programmability and 1.8V minimum supply voltage.

Selection Criteria: For direct replacement in existing designs, use 24LC32AT-I/SN (Microchip, parametric equivalent). For extended temperature applications, use 24LC32AT-E/SN. For automotive-grade requirements, use BR24A32F-WME2. For lower supply voltage operation, use 24AA32AT-I/SN or BR24L32F-WE2.

Frequently Asked Questions (FAQ)

Q: Can 24LC32AT-I/SN directly replace 24LC32AFT-I/SN?

A: Yes. Both parts share identical electrical specifications: 32Kbit capacity, I2C interface, 400 kHz clock frequency, 900 ns access time, 2.5V–5.5V supply voltage, -40°C to 85°C operating temperature, and 8-SOIC package. The difference is packaging format (Cut Tape & Digi-Reel vs. standard designation). The 24LC32AT-I/SN has verified DiGi-Electronics programmability.

Q: What is the difference between 24LC32AF-I/SN and 24LC32AFT-I/SN?

A: Both parts are electrically identical with matching specifications. The primary difference is packaging format: 24LC32AF-I/SN is supplied in Tube packaging, while 24LC32AFT-I/SN is supplied in Cut Tape & Digi-Reel format. Functional performance and electrical characteristics are equivalent.

Q: Can I use 24AA32AT-I/SN if my circuit operates at 1.8V?

A: Yes. The 24AA32AT-I/SN supports supply voltage from 1.8V to 5.5V, compared to 2.5V–5.5V for the 24LC32AFT-I/SN. All other specifications match: 32Kbit capacity, I2C interface, 400 kHz operation, 900 ns access time, and 8-SOIC package. This part is suitable for low-voltage applications.

Q: Is AT24CS32-SSHM-T compatible with 24LC32AFT-I/SN?

A: Functionally compatible with operational differences. Both are 32Kbit I2C EEPROMs in 8-SOIC packages with ROHS3 compliance. The AT24CS32-SSHM-T operates at 1 MHz clock frequency (vs. 400 kHz) with 550 ns access time (vs. 900 ns), providing faster performance. Moisture sensitivity level is MSL 3 (168 hours) instead of MSL 1 (unlimited). Supply voltage range is 1.7V–5.5V.

Q: What are the package differences between Microchip and Rohm parts?

A: Microchip 24LC32 series uses 8-SOIC package (0.154" width, 3.90mm). Rohm BR24 series uses 8-SOP or 8-SOP-J packages (0.173" width, 4.40mm for standard 8-SOP). Both are surface mount configurations with compatible pinouts for I2C EEPROM applications. Verify PCB footprint compatibility before substitution.

Q: Can BR24A32F-WME2 replace 24LC32AFT-I/SN in automotive applications?

A: Yes, with thermal advantage. BR24A32F-WME2 is AEC-Q100 qualified for automotive use with extended operating temperature to 105°C (vs. 85°C). It maintains 32Kbit capacity, I2C interface, 400 kHz operation, 2.5V–5.5V supply range, and ROHS3 compliance. Package is 8-SOP (slightly wider than 8-SOIC). Verify PCB footprint compatibility.

Q: What does "DiGi-Electronics Programmable" mean?

A: DiGi-Electronics Programmable indicates the part has been verified for programming compatibility with DiGi-Electronics programming equipment and services. Parts marked "Not Verified" have not undergone this specific verification but remain functionally equivalent for standard I2C EEPROM operations.

Q: Which substitute offers the lowest minimum supply voltage?

A: AT24CS32-SSHM-T and BR24G32FJ-3AGTE2 both support 1.7V minimum supply voltage. BR24L32F-WE2 and 24AA32AT-I/SN support 1.8V minimum. The main part 24LC32AFT-I/SN requires minimum 2.5V.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status matching the 24LC32AFT-I/SN.

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