Equivalent & Substitute Parts for 24AA52-I/ST

Part Overview

The 24AA52-I/ST is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface communication at 400 kHz with 900 ns access time in an 8-TSSOP surface mount package. This device operates across a supply voltage range of 1.8V to 5.5V and temperature range of -40°C to 85°C, making it suitable for embedded systems requiring non-volatile memory storage. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package form factor, and electrical operating parameters to ensure functional interchangeability in circuit applications.

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	5ms
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24AA52-I/ST are grouped based on the following critical parameters that determine functional interchangeability:

Primary Matching Criteria:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: I2C protocol
Package / Case: 8-TSSOP form factor with 0.173" width and 4.40mm dimensions
Mounting Type: Surface Mount
Operating Temperature Range: -40°C to 85°C minimum

Secondary Compatibility Parameters:

Voltage Supply Range: Minimum 1.8V support required
Write Cycle Time: 5ms or faster
RoHS Compliance: ROHS3 Compliant

Substitutes are divided into two operational categories based on clock frequency capability:

Category A - 400 kHz I2C Operation (Direct Equivalents): Parts operating at 400 kHz clock frequency with 900 ns access time provide direct functional replacement with identical I2C bus speed compatibility.

Category B - 1 MHz I2C Operation (Enhanced Performance Substitutes): Parts operating at 1 MHz clock frequency with 550 ns access time offer improved performance characteristics while maintaining full backward compatibility with 400 kHz I2C bus systems through protocol compliance.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Write Cycle
24AA52-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms
24AA02-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms
24AA024-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms
AT24CS02-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms
AT24HC02C-XHM-B	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms
BR24G02FVT-3AGE2	Rohm Semiconductor	2Kbit	1 MHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	5ms
BR24G02FVT-3GE2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	5ms
BR24L02FVT-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	5ms
BR34E02FVT-3E2	Rohm Semiconductor	2Kbit	400 kHz	Not Specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	5ms
CAT34C02YI-GT5A	onsemi	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5ms
M24C02-DRDW3TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	4ms

Engineering Selection Recommendations

Direct Equivalents (400 kHz Operation): The 24AA02-I/ST, 24AA024-I/ST, BR24G02FVT-3GE2, BR24L02FVT-WE2, BR34E02FVT-3E2, and CAT34C02YI-GT5A provide direct functional replacement for the 24AA52-I/ST with matching 400 kHz I2C clock frequency and 5ms write cycle time. All listed substitutes maintain ROHS3 compliance and -40°C to 85°C operating temperature specification. The 24AA02-I/ST and 24AA024-I/ST from Microchip Technology offer identical electrical characteristics with extended lower voltage support down to 1.7V. The CAT34C02YI-GT5A from onsemi matches the 900 ns access time specification exactly.

Enhanced Performance Substitutes (1 MHz Operation): The AT24CS02-XHM-T, AT24HC02C-XHM-B, and BR24G02FVT-3AGE2 operate at 1 MHz I2C frequency with improved access times (550 ns or better), providing performance enhancement while maintaining full backward compatibility with 400 kHz bus systems. These parts are suitable for applications requiring faster memory access cycles.

Automotive Grade Option: The M24C02-DRDW3TP/K from STMicroelectronics is qualified to AEC-Q100 automotive standards with extended operating temperature range to 125°C, making it appropriate for automotive and industrial applications requiring higher temperature operation.

Voltage Supply Considerations: All substitute parts support minimum 1.7V to 1.8V lower voltage limits. The BR24G02FVT-3AGE2 and BR24G02FVT-3GE2 extend lower voltage support to 1.6V, providing additional margin for low-power applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 1 MHz I2C EEPROM for the 400 kHz 24AA52-I/ST?

A: Yes. Parts operating at 1 MHz I2C frequency (AT24CS02-XHM-T, AT24HC02C-XHM-B, M24C02-DRDW3TP/K) are fully compatible with 400 kHz I2C bus systems. The I2C protocol supports operation at lower clock frequencies, so a 1 MHz capable device functions correctly on a 400 kHz bus. This substitution provides improved access time performance without compatibility issues.

Q: What is the difference between 8-TSSOP and 8-TSSOP-B packages?

A: Both package designations refer to 8-pin Thin Shrink Small Outline Package with identical 0.173" width and 4.40mm dimensions suitable for surface mount assembly. The "-B" suffix indicates a variant designation from specific manufacturers (Rohm Semiconductor). Pin configuration and PCB footprint compatibility remain identical for circuit board layout purposes.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance status, meeting environmental and hazardous substance restrictions for commercial and industrial applications.

Q: What is the significance of the -40°C to 125°C operating temperature range on the M24C02-DRDW3TP/K?

A: The M24C02-DRDW3TP/K extends the upper operating temperature limit to 125°C compared to the standard 85°C specification of the 24AA52-I/ST. This extended range is required for automotive and industrial applications subject to elevated ambient temperatures. This part is AEC-Q100 qualified for automotive use.

Q: Can I use a substitute part with lower voltage supply minimum (1.6V vs 1.8V)?

A: Yes. Parts with lower voltage minimums (BR24G02FVT-3AGE2 and BR24G02FVT-3GE2 at 1.6V) are compatible with circuits designed for the 24AA52-I/ST (1.8V minimum). The lower minimum voltage specification provides additional operational margin and is not a limiting factor for substitution.

Q: What determines if a part is a valid substitute?

A: Valid substitutes must match the following parameters: 2Kbit memory capacity, 256 x 8 organization, I2C interface protocol, 8-TSSOP package form factor, surface mount mounting type, and -40°C to 85°C minimum operating temperature range. Write cycle time of 5ms or faster and ROHS3 compliance are required. Clock frequency (400 kHz or 1 MHz) and access time variations do not prevent substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message