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

Part Overview

The 24C01CT-E/MS 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 a 4.6 µs access time and is housed in an 8-MSOP surface mount package. The part is currently in active production status with 2100 units available in new original inventory.

Substitute parts are necessary when the primary part becomes unavailable, when supply chain constraints require alternative sourcing, or when design flexibility permits operation with functionally equivalent devices that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	100 kHz
Access Time	4.6 µs
Write Cycle Time	1.5 ms
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package Type	8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24C01CT-E/MS is determined by the following critical parameters:

Memory Capacity & Organization: The substitute must provide 1Kbit capacity with 128 x 8 organization to maintain software compatibility and address space equivalence.

Interface Protocol: I2C serial interface is mandatory. The substitute must support identical I2C communication protocol and addressing scheme.

Package Compatibility: The 8-MSOP package footprint is required for direct PCB replacement without layout modifications. Pin count and pitch must match the original specification.

Electrical Specifications: Supply voltage range, operating temperature range, and timing parameters (access time, write cycle time) must be equal to or exceed the original part specifications to ensure functional compatibility in the target application.

Compliance & Certification: RoHS3 compliance and REACH unaffected status must be maintained for regulatory equivalence.

The identified substitute BR24G01FVM-3AGTTR from Rohm Semiconductor meets these core substitution criteria while offering enhanced clock frequency capability (1 MHz versus 100 kHz) and extended supply voltage range (1.6V ~ 5.5V versus 4.5V ~ 5.5V).

Parameter Comparison

Parameter	24C01CT-E/MS (Microchip)	BR24G01FVM-3AGTTR (Rohm)	Compatibility
Memory Size	1Kbit	1Kbit	Equivalent
Memory Organization	128 x 8	128 x 8	Equivalent
Memory Interface	I2C	I2C	Equivalent
Clock Frequency	100 kHz	1 MHz	Substitute Capable (Higher Speed)
Access Time	4.6 µs	Not Specified	Substitute Capable
Write Cycle Time	1.5 ms	5 ms	Substitute Capable (Longer Duration)
Voltage Supply Range	4.5V ~ 5.5V	1.6V ~ 5.5V	Substitute Capable (Wider Range)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	Substitute Limited (Narrower Range)
Package Type	8-MSOP (0.118", 3.00mm)	8-MSOP (0.110", 2.80mm)	Footprint Compatible
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent

Engineering Selection Recommendations

The BR24G01FVM-3AGTTR qualifies as a direct substitute for the 24C01CT-E/MS based on matching memory capacity, organization, I2C interface protocol, and package footprint. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence.

The substitute part offers performance advantages including 10x higher clock frequency (1 MHz) and extended lower voltage operation (1.6V minimum). The wider supply voltage range provides greater design flexibility for multi-voltage applications.

The operating temperature range of the substitute (-40°C ~ 85°C) is narrower than the original part (-40°C ~ 125°C). Applications requiring operation above 85°C must retain the original 24C01CT-E/MS specification.

The write cycle time of the substitute (5 ms) is longer than the original (1.5 ms). Applications with strict write timing requirements must verify compatibility with the extended cycle time.

Both devices are in active production status with confirmed inventory availability. The substitute part is available in Tape & Reel packaging format.

Frequently Asked Questions (FAQ)

Q: Can BR24G01FVM-3AGTTR replace 24C01CT-E/MS in all applications?

A: The substitute is compatible for applications operating within -40°C to 85°C temperature range and tolerating 5 ms write cycle time. Applications requiring operation above 85°C or with write cycle time constraints below 5 ms must use the original part.

Q: Are the 8-MSOP packages physically identical?

A: Both parts use 8-MSOP packaging with compatible pin configurations. The substitute package width is 2.80mm versus 3.00mm for the original. PCB footprints designed for the original part will accommodate the substitute without layout modification.

Q: Does the higher clock frequency of the substitute affect compatibility?

A: The substitute's 1 MHz clock frequency is backward compatible with 100 kHz I2C bus operation. The device will operate correctly at the lower bus speed specified in the original design.

Q: Are both parts RoHS compliant?

A: Yes, both 24C01CT-E/MS and BR24G01FVM-3AGTTR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the inventory status for each part?

A: The original 24C01CT-E/MS has 2100 units in new original stock. The substitute BR24G01FVM-3AGTTR has 3881 units available in Tape & Reel packaging format.

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