Equivalent & Substitute Parts for 24C01CT-I/SN

Part Overview

The 24C01CT-I/SN is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 8-SOIC surface mount packaging. This device is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package footprint and functional interface requirements.

Key Parameters

Parameter	24C01CT-I/SN
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	1 ms
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Core Electrical Requirements:

Memory size: 1Kbit (128 x 8 organization)
Interface: I2C protocol
Package: 8-SOIC form factor (0.154", 3.90mm Width)
Mounting: Surface mount technology

Operational Compatibility Factors:

Clock frequency: 400 kHz minimum (higher frequencies are backward compatible)
Access time: 900 ns or faster
Write cycle time: 5 ms maximum (original part specifies 1 ms)
Supply voltage: Must support 4.5V ~ 5.5V range or broader
Operating temperature: -40°C ~ 85°C minimum coverage
RoHS3 compliance required

Parts are grouped into two categories: direct substitutes (identical electrical and packaging specifications) and compatible alternatives (functionally equivalent with extended or equivalent parameter ranges).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Write Cycle Time	Voltage Supply	Operating Temp	Package	Product Status
24C01CT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1 ms	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24C01C-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1 ms	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24LC014T-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	5 ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24LC01BT-E/SN	Microchip Technology	1Kbit	400 kHz	4.6 µs	5 ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
24LC01BT-I/SN	Microchip Technology	1Kbit	400 kHz	4.6 µs	5 ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24AA01T-I/SN	Microchip Technology	1Kbit	400 kHz	3500 ns	5 ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24AA014HT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	5 ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24LC01BHT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	5 ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
AT24CS01-SSHM-T	Microchip Technology	1Kbit	1 MHz	550 ns	5 ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
M24C01-RMN6TP	STMicroelectronics	1Kbit	400 kHz	900 ns	5 ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
BR24C21FJ-E2	Rohm Semiconductor	1Kbit	400 kHz	Not specified	10 ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Specifications): 24C01C-I/SN is the direct substitute with matching electrical and packaging specifications. Both parts are manufactured by Microchip Technology, carry Active product status, and maintain RoHS3 compliance.

Compatible Alternatives (Extended Parameter Ranges): 24LC014T-I/SN, 24LC01BT-E/SN, 24LC01BT-I/SN, 24AA01T-I/SN, 24AA014HT-I/SN, and 24LC01BHT-I/SN are functionally compatible. These parts support the required 4.5V ~ 5.5V supply range through broader voltage specifications and maintain 400 kHz I2C operation with 8-SOIC packaging. All are Active status with RoHS3 compliance.

Cross-Manufacturer Options: AT24CS01-SSHM-T (Microchip) and M24C01-RMN6TP (STMicroelectronics) provide alternative sourcing with equivalent 1Kbit I2C EEPROM functionality in 8-SOIC packages. Both maintain Active product status and RoHS3 compliance. AT24CS01-SSHM-T operates at 1 MHz clock frequency, providing enhanced speed capability.

Limited Compatibility: BR24C21FJ-E2 (Rohm Semiconductor) is functionally compatible but specifies 10 ms write cycle time, which exceeds the original part's 1 ms specification. This part remains suitable for applications where extended write timing is acceptable.

Frequently Asked Questions (FAQ)

Q: Can 24LC01BT-I/SN replace 24C01CT-I/SN directly? A: Yes. Both parts maintain 1Kbit memory, 400 kHz I2C operation, and 8-SOIC packaging. The 24LC01BT-I/SN supports a broader supply voltage range (2.5V ~ 5.5V) and is fully compatible with 4.5V ~ 5.5V applications.

Q: What is the difference between 24C01CT-I/SN and 24C01C-I/SN? A: The primary difference is packaging format. 24C01CT-I/SN is supplied in Cut Tape & Digi-Reel format, while 24C01C-I/SN is supplied in Tube packaging. Electrical specifications and device functionality are identical.

Q: Is AT24CS01-SSHM-T compatible with 24C01CT-I/SN? A: Yes. Both are 1Kbit I2C EEPROMs in 8-SOIC packages. AT24CS01-SSHM-T operates at 1 MHz clock frequency compared to 400 kHz, providing faster operation while maintaining backward compatibility with 400 kHz I2C bus speeds.

Q: Can I use M24C01-RMN6TP from STMicroelectronics? A: Yes. M24C01-RMN6TP is a 1Kbit I2C EEPROM in 8-SOIC packaging with equivalent electrical specifications. It supports the required 4.5V ~ 5.5V supply range through its 1.8V ~ 5.5V specification and maintains -40°C ~ 85°C operating temperature range.

Q: What does the access time specification mean for substitution? A: Access time indicates the delay from address input to data output availability. The original part specifies 900 ns. Substitute parts with equal or faster access times (lower values) are compatible. Parts with slower access times may impact system timing.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry RoHS3 compliance status, matching the original 24C01CT-I/SN specification.

Q: Why does BR24C21FJ-E2 have a longer write cycle time? A: Write cycle time varies by manufacturer design. BR24C21FJ-E2 specifies 10 ms compared to the original 1 ms. This part remains functionally compatible for applications where write timing is not performance-critical.

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