24C01CT-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24C01CT-E/SN is a 1Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for non-volatile data storage applications requiring I2C serial interface communication. This device operates at 100 kHz clock frequency with 4.6 µs access time and is housed in an 8-SOIC surface mount package. The part maintains active product status with verified programmability and full RoHS3 compliance. Substitute parts are identified when equivalent memory capacity, interface protocol, package form factor, and operating specifications align within acceptable electrical and mechanical tolerances for the application.

Substiute Parts

24C01CT-E/SN

Microchip TechnologyIn Stock: 233224C01CT-E/SN Datasheet

Current PartRFQ

24LC01BT-E/SN

Microchip TechnologyIn Stock: 326924LC01BT-E/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 24LC01BT-E/SN qualifies as a direct substitute based on the following alignment criteria:

Matching Parameters:

• Memory capacity: 1Kbit (128 x 8 organization)
• Serial interface: I2C protocol
• Package form factor: 8-SOIC with identical 0.154" (3.90mm) width
• Surface mount technology
• Access time: 4.6 µs
• Operating temperature range: -40°C ~ 125°C
• RoHS3 compliance and REACH unaffected status

Allowable Variation:

• Clock frequency: 24LC01BT-E/SN operates at 400 kHz (higher than 100 kHz specification), which is backward compatible with 100 kHz I2C bus operation
• Supply voltage range: 24LC01BT-E/SN accepts 2.5V ~ 5.5V (broader range than 4.5V ~ 5.5V), providing enhanced flexibility
• Write cycle time: 24LC01BT-E/SN specifies 5ms (longer than 1.5ms), acceptable for non-time-critical applications

Parameter Comparison

Engineering Selection Recommendations

Both the 24C01CT-E/SN and 24LC01BT-E/SN maintain active product status with verified programmability and full regulatory compliance (RoHS3, REACH unaffected). Selection between these parts depends on application-specific requirements:

The 24C01CT-E/SN is appropriate for systems requiring strict adherence to 100 kHz I2C bus operation and 4.5V minimum supply voltage specification.

The 24LC01BT-E/SN offers enhanced flexibility through 400 kHz I2C capability and extended supply voltage range (2.5V ~ 5.5V), making it suitable for applications requiring lower voltage operation or higher bus speeds. The longer write cycle time (5ms versus 1.5ms) is acceptable in applications where write operations are not time-critical.

Both parts share identical package geometry, pinout, memory organization, and operating temperature range, ensuring mechanical and thermal compatibility in PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the 24LC01BT-E/SN replace the 24C01CT-E/SN in existing designs?

A: Yes. Both parts use identical 8-SOIC package geometry and pinout. The 24LC01BT-E/SN operates at higher I2C clock frequency (400 kHz) and accepts lower supply voltages (2.5V minimum), making it functionally compatible with designs specified for the 24C01CT-E/SN.

Q: What is the impact of the 400 kHz clock frequency on 100 kHz I2C bus designs?

A: The 24LC01BT-E/SN is backward compatible with 100 kHz I2C bus operation. Higher frequency capability does not prevent operation at lower bus speeds; the device will function correctly on 100 kHz buses.

Q: Are there supply voltage considerations when substituting these parts?

A: The 24C01CT-E/SN requires 4.5V ~ 5.5V supply. The 24LC01BT-E/SN accepts 2.5V ~ 5.5V. If your design operates at voltages below 4.5V, only the 24LC01BT-E/SN is suitable. Both parts function identically within the overlapping 4.5V ~ 5.5V range.

Q: How does the write cycle time difference affect application performance?

A: The 24C01CT-E/SN specifies 1.5ms write cycle time; the 24LC01BT-E/SN specifies 5ms. For applications performing sequential write operations, the longer cycle time may reduce throughput. For applications with infrequent or non-sequential writes, this difference is not operationally significant.

Q: Are both parts available in the same packaging options?

A: Both parts are available in 8-SOIC surface mount package with identical 0.154" (3.90mm) width. Packaging compatibility is confirmed for direct PCB substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 24C01CT-E/SN and 24LC01BT-E/SN are RoHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity level).