Equivalent & Substitute Parts for 24LC32AX-I/ST

Part Overview

The 24LC32AX-I/ST is a 32Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 8-TSSOP surface mount packaging. This device operates across a 2.5V to 5.5V supply range with -40°C to 125°C temperature rating and provides 900 ns access time. The part is currently active in production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for specific PCB layouts, or when design requirements necessitate enhanced performance characteristics such as higher clock frequencies or extended temperature ranges.

Substiute Parts

24LC32AX-I/ST

Microchip TechnologyIn Stock: 112424LC32AX-I/ST Datasheet

Current PartRFQ

24LC32A-E/ST

Microchip TechnologyIn Stock: 122124LC32A-E/ST Datasheet

Parametric EquivalentRFQ

BR24G32FVJ-3GTE2

Rohm SemiconductorIn Stock: 2156BR24G32FVJ-3GTE2 Datasheet

MFR RecommendedRFQ

BR24G32FVM-3AGTTR

Rohm SemiconductorIn Stock: 69760BR24G32FVM-3AGTTR Datasheet

MFR RecommendedRFQ

BR24G32FVT-3AGE2

Rohm SemiconductorIn Stock: 50317BR24G32FVT-3AGE2 Datasheet

MFR RecommendedRFQ

BR24G32FVT-3GE2

Rohm SemiconductorIn Stock: 19180BR24G32FVT-3GE2 Datasheet

MFR RecommendedRFQ

BR24L32FV-WE2

Rohm SemiconductorIn Stock: 17692BR24L32FV-WE2 Datasheet

MFR RecommendedRFQ

BR24L32FVT-WE2

Rohm SemiconductorIn Stock: 1455BR24L32FVT-WE2 Datasheet

MFR RecommendedRFQ

BR24T32FVM-WTR

Rohm SemiconductorIn Stock: 1582BR24T32FVM-WTR Datasheet

MFR RecommendedRFQ

CAV24C32YE-GT3

onsemiIn Stock: 6827CAV24C32YE-GT3 Datasheet

MFR RecommendedRFQ

M24C32-DFDW6TP

STMicroelectronicsIn Stock: 16436M24C32-DFDW6TP Datasheet

MFR RecommendedRFQ

M24C32-XDW5TP

STMicroelectronicsIn Stock: 2858M24C32-XDW5TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 24LC32AX-I/ST is determined by the following critical parameters:

Core Functional Parameters (Must Match):

• Memory Size: 32Kbit
• Memory Organization: 4K x 8
• Memory Interface: I2C
• Write Cycle Time: 5ms
• Memory Type: Non-Volatile EEPROM

Flexible Parameters (May Vary):

• Clock Frequency: 400 kHz or higher (1 MHz acceptable)
• Access Time: 900 ns or faster
• Voltage Supply Range: Must encompass minimum 2.5V operation
• Operating Temperature: May be narrower than -40°C ~ 125°C
• Package Type: 8-TSSOP, 8-MSOP, or 8-LSSOP formats acceptable
• Manufacturer: Microchip Technology, Rohm Semiconductor, onsemi, or STMicroelectronics

Substitutes are grouped by manufacturer and performance tier, with primary consideration given to product status (Active vs. Not For New Designs) and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Functional Equivalent (Recommended for New Designs):

24LC32A-E/ST (Microchip Technology) provides identical electrical and thermal specifications to the 24LC32AX-I/ST with matching 400 kHz clock frequency, 900 ns access time, and -40°C to 125°C operating range. Both devices maintain 2.5V to 5.5V supply compatibility and 8-TSSOP packaging. This part is Active in production status.

CAV24C32YE-GT3 (onsemi) matches all critical parameters including 400 kHz frequency, 900 ns access time, and -40°C to 125°C temperature range with identical 8-TSSOP packaging. This part carries AEC-Q100 automotive qualification and is Active in production status.

Tier 2 - Functional Equivalent with Enhanced Performance (Active Status):

BR24G32FVT-3GE2 (Rohm Semiconductor) maintains 400 kHz clock frequency and 8-TSSOP packaging with extended lower voltage operation (1.6V minimum). Operating temperature range is -40°C to 85°C. This part is Active in production status.

BR24L32FVT-WE2 (Rohm Semiconductor) provides 400 kHz operation in 8-TSSOP packaging with 1.8V minimum supply voltage. Operating temperature range is -40°C to 85°C. This part is Active in production status and carries DiGi-Electronics Programmable verification.

BR24T32FVM-WTR (Rohm Semiconductor) offers 400 kHz frequency in 8-MSOP package format with 1.6V minimum supply voltage and -40°C to 85°C operating range. This part is Active in production status.

Tier 3 - Enhanced Performance Variants (Active Status):

BR24G32FVT-3AGE2 (Rohm Semiconductor) provides 1 MHz clock frequency (2.5x faster than original) in 8-TSSOP packaging with 1.7V minimum supply voltage and -40°C to 85°C operating range. This part is Active in production status.

BR24G32FVM-3AGTTR (Rohm Semiconductor) offers 1 MHz clock frequency in 8-MSOP package format with 1.7V minimum supply voltage and -40°C to 85°C operating range. This part is Active in production status with high inventory availability (69,685 units).

M24C32-DFDW6TP (STMicroelectronics) provides 1 MHz clock frequency with improved 450 ns access time in 8-TSSOP packaging. Supply range is 1.7V to 5.5V with -40°C to 85°C operating temperature. This part is Active in production status.

Not Recommended for New Designs:

BR24G32FVJ-3GTE2 (Rohm Semiconductor) and BR24L32FV-WE2 (Rohm Semiconductor) carry "Not For New Designs" product status and should not be selected for new circuit implementations.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher clock frequency than the original 24LC32AX-I/ST?

A: Yes. The 24LC32AX-I/ST operates at 400 kHz. Substitute parts with 1 MHz clock frequency (such as BR24G32FVT-3AGE2, BR24G32FVM-3AGTTR, or M24C32-DFDW6TP) are functionally compatible and provide enhanced performance. The I2C interface remains backward compatible at lower communication speeds.

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

A: These are different surface mount package formats with varying physical dimensions. 8-TSSOP (0.173" width, 4.40mm) is the original package. 8-MSOP (0.110" width, 2.80mm) is narrower for space-constrained layouts. 8-LSSOP (0.173" width, 4.40mm) has different lead configuration. Package selection depends on PCB layout requirements; electrical function remains identical.

Q: Is the 24LC32A-E/ST a direct replacement for 24LC32AX-I/ST?

A: Yes. The 24LC32A-E/ST is a parametric equivalent with identical memory size (32Kbit), interface (I2C), clock frequency (400 kHz), access time (900 ns), supply voltage range (2.5V ~ 5.5V), operating temperature (-40°C ~ 125°C), and 8-TSSOP packaging. Both are manufactured by Microchip Technology and are Active in production status.

Q: Why do some substitute parts have narrower operating temperature ranges?

A: The original 24LC32AX-I/ST operates from -40°C to 125°C. Many substitute parts (Rohm Semiconductor, STMicroelectronics) operate from -40°C to 85°C. If your application requires operation above 85°C, select only parts with -40°C to 125°C rating (24LC32A-E/ST or CAV24C32YE-GT3).

Q: Can I substitute a part with lower minimum supply voltage?

A: Yes, if your circuit supplies the required voltage. The 24LC32AX-I/ST requires minimum 2.5V. Substitute parts with 1.6V, 1.7V, or 1.8V minimums are compatible in circuits supplying 2.5V or higher. However, if your design operates below 2.5V, only select parts with matching or lower minimum voltage specifications.

Q: What does "Not For New Designs" product status mean?

A: Parts marked "Not For New Designs" (BR24G32FVJ-3GTE2, BR24L32FV-WE2) are in end-of-life phase. While functionally compatible, they should not be selected for new circuit designs. Use Active status parts instead for long-term availability and supply chain stability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the original 24LC32AX-I/ST. All parts also maintain MSL 1 (Unlimited) moisture sensitivity level and REACH Unaffected status.