Equivalent & Substitute Parts for 24LC32AT/SN

Part Overview

The 24LC32AT/SN is a 32Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface communication at 400 kHz with 8-SOIC surface mount packaging. This non-volatile memory device operates across a 2.5V to 5.5V supply voltage range and supports industrial temperature specifications from 0°C to 70°C. The part is ROHS3 compliant and carries Active product status with verified DiGi-Electronics programmability. 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	24LC32AT/SN
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	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the 24LC32AT/SN are classified based on the following substitution criteria:

Primary Substitution Parameters:

Memory Size: 32Kbit (4K x 8 organization)
Memory Interface: I2C protocol
Package Type: 8-SOIC or equivalent 8-pin surface mount
Voltage Supply Range: Minimum 2.5V compatibility
Write Cycle Time: 5ms maximum
RoHS Compliance: ROHS3 Compliant

Substitution Categories:

Direct Equivalents maintain identical electrical specifications and packaging, differing only in packaging format (Cut Tape vs. Tube vs. Tape & Reel).

Extended Temperature Range Substitutes provide broader operating temperature specifications (-40°C to 85°C or -40°C to 125°C) while maintaining core electrical parameters, suitable for applications requiring enhanced thermal performance.

Enhanced Performance Substitutes offer faster clock frequencies (1 MHz vs. 400 kHz) and reduced access times (550 ns vs. 900 ns) while maintaining 32Kbit capacity and I2C interface.

Cross-Manufacturer Substitutes from Rohm Semiconductor provide equivalent 32Kbit I2C EEPROM functionality with compatible electrical and thermal specifications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temperature	Package	Product Status
24LC32AT/SN	Microchip Technology	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active
24LC32A/SN	Microchip Technology	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active
24AA32AT-I/SN	Microchip Technology	32Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24LC32AFT-I/SN	Microchip Technology	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24LC32AT-E/SN	Microchip Technology	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
24LC32AT-I/SN	Microchip Technology	32Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
AT24CS32-SSHM-T	Microchip Technology	32Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
BR24G32F-3GTE2	Rohm Semiconductor	32Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP	Active
BR24G32FJ-3AGTE2	Rohm Semiconductor	32Kbit	1 MHz	Not specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active
BR24G32FJ-3GTE2	Rohm Semiconductor	32Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active
BR24L32F-WE2	Rohm Semiconductor	32Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOP	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select 24LC32A/SN when packaging format (Tube) is acceptable. This part maintains all electrical and thermal specifications of the 24LC32AT/SN with verified DiGi-Electronics programmability and Active product status.

For Extended Temperature Range Applications: The 24LC32AT-E/SN extends operating temperature to -40°C to 125°C while maintaining 2.5V to 5.5V supply compatibility and 400 kHz I2C operation. The 24LC32AFT-I/SN and 24LC32AT-I/SN provide -40°C to 85°C operation with identical electrical parameters.

For Low-Voltage Applications: The 24AA32AT-I/SN supports 1.8V minimum supply voltage (versus 2.5V for the main part) and extends temperature range to -40°C to 85°C, maintaining 400 kHz I2C interface and 32Kbit capacity.

For Enhanced Performance Requirements: The AT24CS32-SSHM-T provides 1 MHz clock frequency and 550 ns access time (versus 400 kHz and 900 ns) with 1.7V to 5.5V supply range and -40°C to 85°C operation. This part is suitable for applications requiring faster I2C communication.

For Cross-Manufacturer Sourcing: Rohm Semiconductor BR24G32FJ-3GTE2 and BR24L32F-WE2 provide 32Kbit I2C EEPROM functionality with 400 kHz operation and -40°C to 85°C temperature range. BR24G32FJ-3AGTE2 offers 1 MHz performance. All Rohm parts carry Active product status and ROHS3 compliance. Package variations (8-SOP vs. 8-SOP-J) require PCB layout verification.

Compliance Considerations: All listed substitutes maintain ROHS3 compliance and REACH unaffected status. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for Microchip and Rohm parts, except AT24CS32-SSHM-T which specifies MSL 3 (168 Hours).

Frequently Asked Questions (FAQ)

Q: Can 24LC32A/SN directly replace 24LC32AT/SN? A: Yes. Both parts share identical electrical specifications (32Kbit, 400 kHz I2C, 2.5V to 5.5V, 0°C to 70°C). The difference is packaging format: 24LC32A/SN is supplied in Tube, while 24LC32AT/SN is Cut Tape & Digi-Reel. Verify your assembly equipment compatibility with the packaging format.

Q: What is the difference between 24LC32AT-I/SN and 24LC32AT-E/SN? A: Both maintain identical electrical specifications and 400 kHz I2C operation. The primary difference is operating temperature range: 24LC32AT-I/SN operates -40°C to 85°C, while 24LC32AT-E/SN extends to -40°C to 125°C. Select based on application thermal requirements.

Q: Can I use AT24CS32-SSHM-T as a substitute? A: Yes, with performance enhancement. AT24CS32-SSHM-T provides 1 MHz clock frequency and 550 ns access time versus the 24LC32AT/SN's 400 kHz and 900 ns. It supports 1.7V to 5.5V supply (lower minimum than 2.5V) and -40°C to 85°C operation. MSL rating is 3 (168 Hours) versus 1 (Unlimited) for the main part. Verify your application can tolerate the higher clock frequency and moisture sensitivity requirements.

Q: Are Rohm Semiconductor parts (BR24G32FJ-3GTE2, BR24L32F-WE2) compatible? A: Yes. Both provide 32Kbit I2C EEPROM with 400 kHz operation, -40°C to 85°C temperature range, and ROHS3 compliance. Package differences exist: BR24G32FJ-3GTE2 uses 8-SOP-J (0.154", 3.90mm width), while BR24L32F-WE2 uses 8-SOP (0.173", 4.40mm width). Verify PCB footprint compatibility before selection.

Q: What voltage range should I verify for substitution? A: The 24LC32AT/SN operates 2.5V to 5.5V. Substitutes with lower minimum voltage (1.8V or 1.7V) are compatible. Substitutes with higher minimum voltage are not compatible. Verify your circuit's actual supply voltage falls within the substitute part's specified range.

Q: Does package type affect electrical performance? A: No. 8-SOIC, 8-SOP, and 8-SOP-J packages are mechanically different but electrically equivalent for this 32Kbit I2C EEPROM function. Package selection depends on PCB layout, assembly equipment, and thermal management requirements. Verify footprint compatibility with your design before substitution.

Q: Can I substitute based on memory size alone? A: No. While all listed parts share 32Kbit capacity, clock frequency, access time, voltage range, and temperature specifications must also match your application requirements. The 24LC32AT/SN's 0°C to 70°C range differs from extended-temperature substitutes. Verify all parameters before selection.

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