Equivalent & Substitute Parts for 24AA32AFT-I/ST

Part Overview

The 24AA32AFT-I/ST is a 32Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 900 ns access time. This non-volatile memory device operates across a supply voltage range of 1.7V to 5.5V and temperature range of -40°C to 85°C in an 8-TSSOP surface mount package. The part is ROHS3 compliant and currently active in production. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	24AA32AFT-I/ST
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	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24AA32AFT-I/ST are grouped based on the following critical parameters that determine functional interchangeability:

Primary Matching Criteria:

Memory capacity: 32Kbit
Memory organization: 4K x 8
Interface protocol: I2C
Package type: 8-TSSOP or compatible 8-pin surface mount packages
Supply voltage range: Must encompass or overlap with 1.7V ~ 5.5V
Operating temperature range: Must support -40°C ~ 85°C minimum
Write cycle time: 5ms or faster
RoHS compliance: ROHS3 Compliant

Secondary Considerations:

Clock frequency: 400 kHz or higher (higher frequencies provide backward compatibility)
Access time: 900 ns or faster (faster access times provide backward compatibility)
Automotive qualification (AEC-Q100) available for enhanced reliability applications

Substitutes are organized by manufacturer and package variant. Parts with identical electrical specifications and package types are direct replacements. Parts with higher clock frequencies or faster access times are functionally compatible but offer enhanced performance characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package Type	Write Cycle	RoHS Status
24AA32AFT-I/ST	Microchip Technology	32Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	ROHS3
24AA32AT-I/ST	Microchip Technology	32Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	ROHS3
BR24G32FVM-3AGTTR	Rohm Semiconductor	32Kbit	1 MHz	Not specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	5ms	ROHS3
BR24G32FVT-3AGE2	Rohm Semiconductor	32Kbit	1 MHz	Not specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	5ms	ROHS3
BR24G32FVT-3GE2	Rohm Semiconductor	32Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	5ms	ROHS3
BR24T32FVM-WTR	Rohm Semiconductor	32Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-MSOP	5ms	ROHS3
CAT24C32YI-G	onsemi	32Kbit	1 MHz	400 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	ROHS3
CAT24C32YI-GT3	onsemi	32Kbit	1 MHz	400 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	ROHS3
CAV24C32YE-GT3	onsemi	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	5ms	ROHS3
M24C32-DFDW6TP	STMicroelectronics	32Kbit	1 MHz	450 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms	ROHS3
M24C32-DRDW8TP/K	STMicroelectronics	32Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	4ms	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Package Specifications):

24AA32AT-I/ST from Microchip Technology is the primary direct substitute. This part maintains identical memory capacity, interface, clock frequency, access time, and package type. The minimum supply voltage is 1.8V compared to 1.7V on the original part, which is acceptable for most applications operating above 1.8V. Both parts are ROHS3 compliant and active in production.

Compatible Substitutes (Same Package, Enhanced Performance):

CAT24C32YI-G and CAT24C32YI-GT3 from onsemi provide 1 MHz clock frequency and 400 ns access time, both superior to the 400 kHz and 900 ns specifications of the original part. These parts are packaged in 8-TSSOP and maintain full voltage and temperature range compatibility. Both are ROHS3 compliant and active.

M24C32-DFDW6TP from STMicroelectronics offers 1 MHz operation and 450 ns access time in 8-TSSOP packaging with matching voltage and temperature ranges. This part is ROHS3 compliant and active.

Automotive-Qualified Alternatives:

M24C32-DRDW8TP/K from STMicroelectronics is AEC-Q100 qualified with extended operating temperature to 105°C, 1 MHz clock frequency, and 450 ns access time. Minimum supply voltage is 1.8V. Write cycle time is 4ms, faster than the 5ms specification. This part is suitable for automotive applications requiring enhanced reliability.

CAV24C32YE-GT3 from onsemi is AEC-Q100 qualified with extended operating temperature to 125°C. This part matches the original 400 kHz and 900 ns specifications but has a minimum supply voltage of 2.5V, limiting its use to applications not requiring operation below 2.5V.

Alternative Package Options:

BR24G32FVT-3AGE2 and BR24G32FVT-3GE2 from Rohm Semiconductor provide 8-TSSOP-B packaging. The 3AGE2 variant operates at 1 MHz with 1.7V minimum supply voltage. The 3GE2 variant operates at 400 kHz with 1.6V minimum supply voltage. Both are ROHS3 compliant and active. 8-TSSOP-B is mechanically compatible with standard 8-TSSOP footprints.

BR24G32FVM-3AGTTR and BR24T32FVM-WTR from Rohm Semiconductor use 8-MSOP packaging (0.110" width). These parts are suitable for space-constrained applications. The FVM-3AGTTR operates at 1 MHz with 1.7V minimum supply. The FVM-WTR operates at 400 kHz with 1.6V minimum supply. Both are ROHS3 compliant and active.

Frequently Asked Questions (FAQ)

Q: Can I use CAT24C32YI-GT3 as a direct replacement for 24AA32AFT-I/ST?

A: Yes. Both parts are 32Kbit I2C EEPROM devices in 8-TSSOP packaging with identical memory organization, write cycle time, and operating temperature range. The CAT24C32YI-GT3 operates at 1 MHz with 400 ns access time, both superior to the 400 kHz and 900 ns specifications of the original part. This provides enhanced performance while maintaining full backward compatibility.

Q: What is the difference between 8-TSSOP and 8-MSOP packages?

A: Both are 8-pin surface mount packages for EEPROM devices. The 8-TSSOP (Thin Shrink Small Outline Package) has a width of 0.173" (4.40mm). The 8-MSOP (Mini Small Outline Package) has a narrower width of 0.110" (2.80mm). The 8-MSOP is used when board space is limited. Pin configurations and electrical specifications remain compatible between these package types for equivalent parts.

Q: Can I use BR24G32FVM-3AGTTR in place of 24AA32AFT-I/ST?

A: The BR24G32FVM-3AGTTR is functionally compatible but uses 8-MSOP packaging instead of 8-TSSOP. If your PCB layout accommodates the narrower 8-MSOP footprint, this part is a valid substitute. It provides 1 MHz operation and maintains the same 32Kbit capacity, I2C interface, and voltage/temperature ranges. Verify PCB footprint compatibility before selection.

Q: What is the advantage of M24C32-DRDW8TP/K over the original 24AA32AFT-I/ST?

A: The M24C32-DRDW8TP/K is AEC-Q100 automotive qualified with extended operating temperature to 105°C (versus 85°C). It operates at 1 MHz with 450 ns access time and has a faster 4ms write cycle time. The minimum supply voltage is 1.8V. This part is recommended for automotive applications or systems requiring enhanced reliability and extended temperature operation.

Q: Is CAV24C32YE-GT3 suitable for all applications using 24AA32AFT-I/ST?

A: CAV24C32YE-GT3 is AEC-Q100 qualified with extended temperature to 125°C and matches the original 400 kHz and 900 ns specifications. However, its minimum supply voltage is 2.5V, compared to 1.7V for the original part. This part is suitable only for applications operating at 2.5V or higher. Verify your system's minimum supply voltage before selection.

Q: Can I use 24AA32AT-I/ST as a drop-in replacement?

A: Yes. The 24AA32AT-I/ST is a direct substitute from Microchip Technology with identical specifications except for a minimum supply voltage of 1.8V (versus 1.7V). If your application operates at 1.8V or higher, this part is a complete drop-in replacement with no design changes required.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive 3, which restricts the use of specific hazardous materials in electrical and electronic equipment. All substitute parts listed are ROHS3 compliant, ensuring environmental and regulatory compliance equivalent to the original 24AA32AFT-I/ST.

Q: Are there performance differences between 400 kHz and 1 MHz I2C EEPROM parts?

A: The 1 MHz variants (CAT24C32YI series, M24C32-DFDW6TP, BR24G32FVM-3AGTTR) support faster I2C bus speeds and typically have faster access times. These parts are backward compatible with 400 kHz systems and will operate correctly at lower speeds. Use 1 MHz parts when your system requires higher data transfer rates or when faster access times are beneficial.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message