Equivalent & Substitute Parts for 24AA52T-I/ST

Part Overview

The 24AA52T-I/ST is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 900 ns access time in an 8-TSSOP surface mount package. This part is Active status and ROHS3 compliant. Substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional equivalence 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 Type	8-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are grouped into two categories based on allowed electrical and mechanical parameters:

Category 1: Direct Substitutes (Identical Core Parameters) Parts matching all critical parameters: 2Kbit memory size, 256 x 8 organization, I2C interface, 400 kHz clock frequency, 8-TSSOP package, and -40°C ~ 85°C operating temperature range. These parts maintain voltage supply compatibility within 1.7V ~ 5.5V or 1.8V ~ 5.5V ranges.

Category 2: Enhanced Performance Substitutes (Higher Clock Frequency) Parts with 1 MHz clock frequency and 550 ns access time, maintaining all other core parameters including 2Kbit capacity, I2C interface, 8-TSSOP package, and compatible voltage/temperature ranges. These provide faster operation while preserving functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Product Status
24AA52T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24AA024T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24AA02T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
34AA02T-E/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
AT24CS02-XHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
AT24HC02C-XHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
AT34C02D-XHM-T	Microchip	2Kbit	1 MHz	Not specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
BR24G02FVT-3AGE2	Rohm Semiconductor	2Kbit	1 MHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
BR24G02FVT-3GE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
BR24L02FVT-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
CAT34C02YI-GT5A	onsemi	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the 24AA52T-I/ST. Selection between substitutes depends on application-specific requirements:

For applications requiring identical electrical characteristics and 400 kHz I2C operation, select from 24AA024T-I/ST, 24AA02T-I/ST, BR24G02FVT-3GE2, BR24L02FVT-WE2, or CAT34C02YI-GT5A.

For applications tolerating extended operating temperature to 125°C, the 34AA02T-E/ST extends the upper temperature limit while maintaining 400 kHz operation.

For applications requiring faster I2C clock speeds at 1 MHz, select from AT24CS02-XHM-T, AT24HC02C-XHM-T, or AT34C02D-XHM-T, which provide 550 ns access time performance.

For cross-manufacturer alternatives, Rohm Semiconductor BR24G02 series parts (both 400 kHz and 1 MHz variants) and onsemi CAT34C02YI-GT5A provide equivalent functionality with ROHS3 compliance and Active status.

Frequently Asked Questions (FAQ)

Q: Can 24AA024T-I/ST replace 24AA52T-I/ST directly? A: Yes. Both parts share identical memory capacity (2Kbit), organization (256 x 8), I2C interface, 400 kHz clock frequency, 8-TSSOP package, and -40°C ~ 85°C operating range. The 24AA024T-I/ST has a lower voltage floor (1.7V vs 1.8V), which is compatible with the 24AA52T-I/ST application range.

Q: What is the difference between 400 kHz and 1 MHz clock frequency substitutes? A: The 1 MHz variants (AT24CS02-XHM-T, AT24HC02C-XHM-T, AT34C02D-XHM-T) operate at faster I2C clock speeds with 550 ns access time versus 900 ns. These are suitable for applications requiring higher data transfer rates while maintaining all other functional parameters.

Q: Are Rohm Semiconductor BR24G02 parts compatible with Microchip 24AA52T-I/ST? A: Yes, for functional equivalence. Both BR24G02FVT-3AGE2 (1 MHz) and BR24G02FVT-3GE2 (400 kHz) maintain 2Kbit capacity, 256 x 8 organization, I2C interface, 8-TSSOP package footprint, and -40°C ~ 85°C operating range. The package designation is 8-TSSOP-B, which is mechanically compatible with standard 8-TSSOP.

Q: Does the 34AA02T-E/ST offer advantages over the main part? A: The 34AA02T-E/ST extends the operating temperature range to 125°C while maintaining all other parameters identical to the 24AA52T-I/ST. This is beneficial for high-temperature applications; otherwise, both parts are functionally equivalent.

Q: What is the voltage supply compatibility consideration? A: The 24AA52T-I/ST operates from 1.8V ~ 5.5V. Most substitutes operate from 1.7V ~ 5.5V, providing lower voltage margin. BR24G02 series parts operate from 1.6V ~ 5.5V. All ranges are compatible with standard 3.3V and 5V logic systems.

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