24LCS52T-I/MC EEPROM Equivalent & Substitute Parts

Part Overview

The 24LCS52T-I/MC is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology, housed in an 8-DFN (2x3) package. This non-volatile memory device operates at 400 kHz I2C clock frequency with 900 ns access time and supports a supply voltage range of 2.2V to 5.5V. The part is currently active in production with RoHS3 compliance and MSL 3 rating. Equivalent and substitute parts are identified when they maintain identical memory capacity, interface protocol, electrical performance, and mechanical compatibility within specified tolerance ranges.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
Voltage Supply Range	2.2V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-VFDFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24LCS52T-I/MC is determined by the following critical parameters:

Memory capacity: 2Kbit with 256 x 8 organization
Interface protocol: I2C at 400 kHz
Access time: 900 ns maximum
Write cycle time: 5 ms
Operating temperature range: -40°C to 85°C
Supply voltage compatibility: minimum 2.2V support required
Package mechanical compatibility: 8-pin DFN form factor with exposed pad
RoHS3 compliance and EAR99 classification

All identified substitute parts meet these core electrical and mechanical requirements. Variations in supply voltage upper limits, MSL ratings, and packaging designations (8-VFDFN vs. 8-UFDFN) do not affect functional substitution when the minimum voltage requirement of 2.2V is maintained.

Parameter Comparison

Parameter	24LCS52T-I/MC	24AA025T-I/MC	BR24L02NUX-WTR	M24C02-FMC6TG	M24C02-RMC6TG	M34E02-FMC6TG
Manufacturer	Microchip Technology	Microchip Technology	Rohm Semiconductor	STMicroelectronics	STMicroelectronics	STMicroelectronics
Memory Size	2Kbit	2Kbit	2Kbit	2Kbit	2Kbit	2Kbit
Memory Organization	256 x 8	256 x 8	256 x 8	256 x 8	256 x 8	256 x 8
Memory Interface	I2C	I2C	I2C	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz
Access Time	900 ns	900 ns	Not specified	900 ns	900 ns	900 ns
Write Cycle Time	5 ms	5 ms	5 ms	5 ms	5 ms	5 ms
Voltage Supply Range	2.2V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-VFDFN Exposed Pad	8-VFDFN Exposed Pad	8-UFDFN Exposed Pad	8-UFDFN Exposed Pad	8-UFDFN Exposed Pad	8-UFDFN Exposed Pad
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain active production status and RoHS3 compliance, ensuring regulatory alignment with the 24LCS52T-I/MC. The 24AA025T-I/MC from Microchip Technology provides the closest functional match with identical package designation (8-VFDFN) and MSL rating, making it the primary equivalent choice for direct replacement in existing designs.

The STMicroelectronics options (M24C02-FMC6TG, M24C02-RMC6TG, M34E02-FMC6TG) utilize the 8-UFDFN package variant, which maintains mechanical compatibility with 8-pin DFN footprints while offering improved moisture sensitivity (MSL 1). These parts are suitable for applications where enhanced reliability under high-humidity storage conditions is required.

The BR24L02NUX-WTR from Rohm Semiconductor similarly provides MSL 1 rating with VSON008X2030 package designation, representing an alternative from a different manufacturer with equivalent electrical performance.

Selection between substitute parts should be based on supply chain availability, packaging preference, and moisture sensitivity requirements for the target application environment.

Frequently Asked Questions (FAQ)

Q: Can the 24AA025T-I/MC directly replace the 24LCS52T-I/MC?

A: Yes. The 24AA025T-I/MC is functionally equivalent with identical memory capacity (2Kbit), I2C interface (400 kHz), access time (900 ns), and package type (8-VFDFN). Both parts support the required -40°C to 85°C operating temperature range and maintain RoHS3 compliance. The 24AA025T-I/MC supports a lower minimum supply voltage (1.7V vs. 2.2V), which does not affect compatibility in systems designed for the 24LCS52T-I/MC.

Q: What is the difference between 8-VFDFN and 8-UFDFN packages?

A: Both designations refer to 8-pin DFN (Dual Flat No-lead) packages with exposed pads in the 2x3 mm footprint. The primary difference is the manufacturer's package naming convention. VFDFN is Microchip's designation, while UFDFN is used by STMicroelectronics and Rohm Semiconductor. The physical dimensions and PCB footprints are compatible for reflow soldering applications.

Q: Are there voltage supply compatibility concerns when substituting parts?

A: The 24LCS52T-I/MC requires a minimum supply voltage of 2.2V. All substitute parts support this minimum requirement, with most offering lower minimum thresholds (1.7V or 1.8V). This ensures compatibility in any system designed for the original part. Upper voltage limits (5.5V) are identical across all parts.

Q: What does MSL rating mean for EEPROM selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions (30°C, 85% relative humidity) before soldering. MSL 3 allows 168 hours of exposure, while MSL 1 allows unlimited exposure. Substitute parts with MSL 1 rating provide extended shelf life and reduced risk of moisture-induced failures in high-humidity environments.

Q: Can I use M24C02 or M34E02 parts interchangeably?

A: Yes, within the specified parameter set. Both M24C02-FMC6TG and M34E02-FMC6TG maintain identical electrical specifications (2Kbit, I2C 400 kHz, 900 ns access time, 5 ms write cycle). The M34E02 base product number indicates a different manufacturer series, but functional compatibility is maintained for I2C EEPROM applications requiring 2Kbit capacity.

Q: Is DiGi-Electronics programmability verification required for substitution?

A: Programmability verification status does not affect electrical or mechanical substitution eligibility. The 24LCS52T-I/MC and 24AA025T-I/MC carry verified status, while STMicroelectronics and Rohm parts show unverified status. This reflects internal testing protocols and does not indicate functional incompatibility in standard I2C EEPROM applications.

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