Equivalent & Substitute Parts for 24LC32A-E/SM

Part Overview

The 24LC32A-E/SM is a 32Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 900 ns access time. This device is actively produced and widely used in embedded systems requiring non-volatile memory storage. Substitute parts are identified based on matching electrical specifications, memory organization, and interface compatibility to ensure functional equivalence in system designs.

Substiute Parts

24LC32A-E/SM

Microchip TechnologyIn Stock: 116524LC32A-E/SM Datasheet

Current PartRFQ

BR24G32F-3GTE2

Rohm SemiconductorIn Stock: 3434BR24G32F-3GTE2 Datasheet

MFR RecommendedRFQ

BR24T32F-WE2

Rohm SemiconductorIn Stock: 26608BR24T32F-WE2 Datasheet

MFR RecommendedRFQ

M24C32-DFMN6TP

STMicroelectronicsIn Stock: 8122M24C32-DFMN6TP Datasheet

MFR RecommendedRFQ

M24C32-RMN6P

STMicroelectronicsIn Stock: 2121M24C32-RMN6P Datasheet

MFR RecommendedRFQ

M24C32-RMN6TP

STMicroelectronicsIn Stock: 42917M24C32-RMN6TP Datasheet

MFR RecommendedRFQ

M24C32-WMN6P

STMicroelectronicsIn Stock: 15936M24C32-WMN6P Datasheet

MFR RecommendedRFQ

M24C32-WMN6TP

STMicroelectronicsIn Stock: 40297M24C32-WMN6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 24LC32A-E/SM are qualified based on the following criteria:

Core Electrical Compatibility:

• Memory Size: 32Kbit (4K x 8 organization)
• Memory Interface: I2C protocol
• Write Cycle Time: 5ms
• Voltage Supply Range: Must encompass or overlap with 2.5V ~ 5.5V
• Operating Temperature: Must support -40°C minimum and 125°C maximum where applicable

Mechanical Compatibility:

• Mounting Type: Surface Mount
• Package Type: 8-pin SOIC variants (8-SOIC, 8-SOP, 8-SOIJ)

Functional Equivalence:

• Non-volatile EEPROM memory format
• I2C clock frequency: 400 kHz or higher
• Access time: 900 ns or faster

Substitutes are grouped by manufacturer and clock frequency capability. Parts with higher clock frequencies (1 MHz) and faster access times (450 ns) are electrically compatible but represent enhanced performance variants.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

The BR24G32F-3GTE2 and BR24T32F-WE2 from Rohm Semiconductor are direct functional equivalents operating at 400 kHz I2C frequency. Both devices are actively produced and ROHS3 compliant. The extended lower voltage range (1.6V minimum) provides additional design flexibility for low-power applications. Operating temperature range is limited to -40°C ~ 85°C, which is acceptable for most commercial and industrial applications but does not extend to the 125°C maximum of the original part.

The STMicroelectronics M24C32 series (M24C32-DFMN6TP, M24C32-RMN6P, M24C32-RMN6TP) offers enhanced performance with 1 MHz I2C clock frequency and 450 ns access time. These parts are actively produced and ROHS3 compliant. The M24C32-DFMN6TP is recommended for new designs requiring higher I2C clock speeds. The M24C32-RMN6TP offers the largest inventory availability (42,900 units) in Cut Tape & Digi-Reel packaging.

Legacy Substitutes (Not For New Designs):

The M24C32-WMN6P and M24C32-WMN6TP are marked "Not For New Designs" and should be used only for legacy system maintenance or replacement applications. These parts remain in inventory but are not recommended for new product development.

Voltage Supply Considerations:

The 24LC32A-E/SM operates from 2.5V ~ 5.5V. Rohm parts extend the lower limit to 1.6V, while STMicroelectronics M24C32-DFMN6TP extends to 1.7V and M24C32-RMN6P/RMN6TP to 1.8V. All substitutes support the full 5.5V upper limit.

Temperature Range Considerations:

The original 24LC32A-E/SM supports -40°C ~ 125°C operation. All substitute parts are rated to -40°C minimum but limited to -85°C maximum. Applications requiring operation above 85°C must retain the original 24LC32A-E/SM.

Frequently Asked Questions (FAQ)

Q: Can I use M24C32 parts as direct replacements for 24LC32A-E/SM?

A: Yes, the M24C32 series is electrically compatible. The M24C32-DFMN6TP, M24C32-RMN6P, and M24C32-RMN6TP are actively produced and support all required I2C functionality. However, verify that your application does not require operation above 85°C, as the original part supports up to 125°C.

Q: What is the difference between 400 kHz and 1 MHz I2C clock frequency?

A: The 24LC32A-E/SM operates at 400 kHz I2C clock frequency. The M24C32 series supports 1 MHz, which is backward compatible and provides faster data transfer rates. Both frequencies are compatible with standard I2C protocol. No firmware or software changes are required for substitution.

Q: Are Rohm BR24G32F and BR24T32F parts interchangeable?

A: Yes, both Rohm parts (BR24G32F-3GTE2 and BR24T32F-WE2) are functionally equivalent, operating at 400 kHz I2C frequency with identical memory organization and electrical specifications. Selection between them depends on packaging requirements (Tape & Reel) and inventory availability.

Q: What packaging options are available for substitutes?

A: The original 24LC32A-E/SM is supplied in Tube packaging (8-SOIJ). Rohm substitutes are supplied in Tape & Reel (8-SOP). STMicroelectronics M24C32 variants are available in Bulk, Cut Tape & Digi-Reel, and Tube packaging (8-SOIC). All packages are 8-pin SOIC variants with identical pinout and electrical interface.

Q: Can I substitute parts with different voltage supply ranges?

A: Yes, provided your application operates within the overlapping voltage range. The 24LC32A-E/SM requires 2.5V ~ 5.5V. Rohm parts support 1.6V ~ 5.5V, and STMicroelectronics parts support 1.7V ~ 5.5V or 1.8V ~ 5.5V depending on variant. All substitutes are compatible with the original 2.5V ~ 5.5V range.

Q: Which substitute has the highest inventory availability?

A: The M24C32-RMN6TP from STMicroelectronics has the highest inventory with 42,900 units in stock, supplied in Cut Tape & Digi-Reel packaging.