CAT24C01BWA EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The CAT24C01BWA is a 1Kbit I2C EEPROM memory IC manufactured by onsemi, packaged in 8-SOIC form factor. This component operates at 400 kHz clock frequency with 1 µs access time and supports a supply voltage range of 1.8V to 6V. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

CAT24C01BWA

onsemiIn Stock: 1064CAT24C01BWA Datasheet

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N24C02UDTG

onsemiIn Stock: 1387N24C02UDTG Datasheet

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24AA01HT-I/SN

Microchip TechnologyIn Stock: 77224AA01HT-I/SN Datasheet

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24LC014HT-I/SN

Microchip TechnologyIn Stock: 119924LC014HT-I/SN Datasheet

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BR24G01FJ-3GTE2

Rohm SemiconductorIn Stock: 743BR24G01FJ-3GTE2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAT24C01BWA is determined by the following critical parameters:

Primary Compatibility Criteria:

• Memory Size: 1Kbit (128 x 8 organization)
• Memory Interface: I2C protocol
• Package Type: 8-SOIC form factor
• Clock Frequency: 400 kHz minimum
• Voltage Supply Range: Must encompass or overlap with 1.8V ~ 6V
• Operating Temperature: Must support -40°C ~ 105°C or equivalent industrial range

Secondary Considerations:

• Access Time: Lower values indicate faster performance
• Write Cycle Time: Affects programming speed
• Product Status: Active status preferred for long-term availability
• RoHS Compliance: Regulatory alignment for new designs

Substitute parts are grouped based on matching memory capacity, I2C interface, and 8-SOIC packaging. Parts with higher clock frequencies (1 MHz) remain compatible as they support the 400 kHz operation requirement through backward compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (8-SOIC Package, 1Kbit, 400 kHz):

24AA01HT-I/SN (Microchip Technology) and BR24G01FJ-3GTE2 (Rohm Semiconductor) provide the closest functional equivalence to the CAT24C01BWA. Both maintain identical memory capacity, I2C interface, clock frequency, and 8-SOIC packaging. Both parts are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The 24AA01HT-I/SN offers improved access time (900 ns vs. 1 µs) and faster write cycle (5 ms vs. 10 ms).

Higher Performance Alternative (8-SOIC Package, 1Kbit, 1 MHz):

24LC014HT-I/SN (Microchip Technology) provides enhanced performance with 1 MHz clock frequency and 400 ns access time while maintaining 1Kbit capacity and 8-SOIC packaging. This part is suitable for applications requiring faster I2C communication. Voltage supply range is 2.5V ~ 5.5V, which may require verification against the original 1.8V minimum specification.

Package Variant (8-VFSOP Package, 2Kbit, 1 MHz):

N24C02UDTG (onsemi) offers 2Kbit capacity with 1 MHz operation in 8-VFSOP packaging. This part is not pin-compatible due to different package form factor and increased memory size. Selection requires PCB redesign and firmware modification to address the additional memory capacity.

Product Status Consideration:

All substitute parts listed are active products with current manufacturing status, providing superior long-term availability compared to the obsolete CAT24C01BWA.

Frequently Asked Questions (FAQ)

Q: Can 24AA01HT-I/SN directly replace CAT24C01BWA without PCB modification?

A: Yes. Both parts share identical 8-SOIC packaging, 1Kbit memory capacity, 128 x 8 organization, I2C interface, and 400 kHz clock frequency. Pin assignments are compatible for direct substitution. The improved access time and write cycle performance of the 24AA01HT-I/SN provide functional enhancement without compatibility issues.

Q: What is the key difference between 24LC014HT-I/SN and 24AA01HT-I/SN?

A: The primary difference is clock frequency. 24LC014HT-I/SN operates at 1 MHz with 400 ns access time, while 24AA01HT-I/SN operates at 400 kHz with 900 ns access time. Both maintain 1Kbit capacity and 8-SOIC packaging. The 24LC014HT-I/SN requires verification of the 2.5V minimum voltage supply against system requirements, as the original CAT24C01BWA supports 1.8V minimum.

Q: Why is N24C02UDTG listed as a substitute if it has different packaging?

A: N24C02UDTG is functionally related but not pin-compatible. It provides 2Kbit capacity in 8-VFSOP packaging, requiring PCB redesign and firmware modification. This part is listed as an alternative for applications where increased memory capacity justifies redesign effort.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed (24AA01HT-I/SN, 24LC014HT-I/SN, N24C02UDTG, BR24G01FJ-3GTE2) are ROHS3 compliant, meeting current regulatory requirements for new designs and manufacturing.

Q: What is the operating temperature range consideration for substitution?

A: The CAT24C01BWA operates to 105°C maximum. All substitute parts operate to 85°C maximum. Applications requiring operation above 85°C require verification that the substitute part meets thermal requirements, or alternative components must be selected.

Q: Can I use BR24G01FJ-3GTE2 as a direct replacement?

A: Yes. BR24G01FJ-3GTE2 maintains 1Kbit capacity, I2C interface, 400 kHz clock frequency, and 8-SOIC packaging. The part is manufactured by Rohm Semiconductor and is ROHS3 compliant. Access time is not specified in available documentation; verification with the manufacturer is recommended for timing-critical applications.