Equivalent & Substitute Parts for 24LC025T-I/ST

Part Overview

The 24LC025T-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. Packaged in 8-TSSOP surface mount configuration, this non-volatile memory device operates across 2.5V to 5.5V supply voltage range and -40°C to 85°C temperature range. The part is ROHS3 compliant and currently in active production status with verified programmability certification from DiGi-Electronics. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure direct functional replacement 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	2.5V ~ 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 for the 24LC025T-I/ST are categorized based on the following substitution criteria:

Direct Manufacturer Equivalents maintain identical electrical specifications and package configuration, differing only in packaging format (Tube vs. Tape & Reel).

MFR Recommended Substitutes provide functional equivalence with allowable parameter variations:

Extended supply voltage range (1.7V minimum vs. 2.5V minimum)
Enhanced clock frequency (1 MHz vs. 400 kHz)
Improved access time (550 ns vs. 900 ns)
Extended operating temperature range (up to 125°C)
Alternative manufacturers (Rohm Semiconductor)

Parametric Equivalents match core electrical and memory specifications while maintaining the same 400 kHz clock frequency and 900 ns access time performance characteristics.

All substitute parts maintain:

2Kbit memory capacity
256 x 8 memory organization
I2C interface protocol
8-TSSOP package footprint
Surface mount mounting type
ROHS3 compliance
5ms write cycle time

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Programmable	Inventory
24LC025T-I/ST	Microchip	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Verified	1946 Pcs
24LC025-I/ST	Microchip	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not Verified	47800 Pcs
24AA024T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Verified	2100 Pcs
24AA02T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Verified	3592 Pcs
34AA02T-E/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Not Verified	2040 Pcs
AT24CS02-XHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not Verified	15684 Pcs
AT24HC02C-XHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not Verified	5546 Pcs
AT34C02D-XHM-T	Microchip	2Kbit	1 MHz	N/A	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not Verified	7447 Pcs
24LC024T-I/ST	Microchip	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Verified	10400 Pcs
24LC02BT-I/ST	Microchip	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Verified	7900 Pcs
BR24G02FVT-3AGE2	Rohm Semiconductor	2Kbit	1 MHz	N/A	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not Verified	2665 Pcs

Engineering Selection Recommendations

For Direct Replacement with Identical Specifications: Select 24LC025-I/ST when packaging format change from Tape & Reel to Tube is acceptable. This part maintains all electrical and thermal specifications of the primary part with significantly higher inventory availability (47800 Pcs).

For Extended Supply Voltage Range Applications: The 24AA024T-I/ST and 24AA02T-I/ST provide lower minimum supply voltage (1.7V vs. 2.5V) while maintaining identical clock frequency and access time performance. Both parts carry DiGi-Electronics programmability verification. Select based on specific device package requirements and inventory needs.

For Extended Temperature Range: The 34AA02T-E/ST extends operating temperature to 125°C maximum, suitable for high-temperature applications. This part maintains 400 kHz clock frequency and 900 ns access time but carries MSL rating of 3 (168 Hours) versus MSL 1 (Unlimited) for the primary part.

For Enhanced Performance Requirements: AT24CS02-XHM-T, AT24HC02C-XHM-T, and AT34C02D-XHM-T offer 1 MHz clock frequency and 550 ns access time for applications requiring faster I2C communication. These parts support extended supply voltage range (1.7V minimum) and maintain ROHS3 compliance.

For Alternative Manufacturer Selection: BR24G02FVT-3AGE2 from Rohm Semiconductor provides 1 MHz clock frequency with extended supply voltage range (1.6V minimum). This part is suitable for applications requiring non-Microchip sourcing or dual-source strategies.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical package footprint (8-TSSOP, 0.173" width, 4.40mm).

Frequently Asked Questions (FAQ)

Q: Can 24LC025-I/ST be replaced with 24AA02T-I/ST? A: Yes. Both parts share identical memory capacity (2Kbit), organization (256 x 8), interface (I2C), clock frequency (400 kHz), access time (900 ns), and package (8-TSSOP). The 24AA02T-I/ST provides extended supply voltage range (1.7V minimum vs. 2.5V minimum), making it suitable for lower-voltage applications.

Q: What is the difference between 400 kHz and 1 MHz clock frequency options? A: Clock frequency determines I2C bus speed. 400 kHz is standard I2C speed; 1 MHz is fast I2C mode. Parts with 1 MHz capability (AT24CS02-XHM-T, AT24HC02C-XHM-T, AT34C02D-XHM-T, BR24G02FVT-3AGE2) support faster data transfer rates and typically feature improved access time (550 ns vs. 900 ns). Selection depends on system I2C bus configuration and timing requirements.

Q: Are all substitute parts compatible with the same PCB footprint? A: Yes. All listed substitute parts use 8-TSSOP package with 0.173" width and 4.40mm dimensions. PCB footprint compatibility is maintained across all substitutes. BR24G02FVT-3AGE2 uses 8-TSSOP-B variant, which maintains identical footprint dimensions.

Q: What does DiGi-Electronics Programmable verification mean? A: DiGi-Electronics programmability verification indicates the part has been tested and confirmed to support in-circuit programming. Parts marked "Verified" (24LC025T-I/ST, 24AA024T-I/ST, 24AA02T-I/ST, 24LC024T-I/ST, 24LC02BT-I/ST) are recommended for applications requiring programming capability. Parts marked "Not Verified" may still support programming but have not undergone this specific certification.

Q: Can I use AT24CS02-XHM-T as a direct replacement for 24LC025T-I/ST? A: Functionally yes, with performance enhancement. AT24CS02-XHM-T provides faster clock frequency (1 MHz vs. 400 kHz) and improved access time (550 ns vs. 900 ns). Extended supply voltage range (1.7V minimum) provides additional flexibility. However, verify system I2C bus configuration supports 1 MHz operation before substitution.

Q: What is the significance of MSL (Moisture Sensitivity Level) rating? A: MSL indicates moisture sensitivity during storage and handling. MSL 1 (Unlimited) allows indefinite shelf storage without special precautions. MSL 3 (168 Hours) requires controlled storage conditions and limits shelf life to 168 hours after package opening. The 34AA02T-E/ST carries MSL 3 rating; all other parts carry MSL 1.

Q: Which substitute offers the best inventory availability? A: 24LC025-I/ST provides highest inventory (47800 Pcs) among direct electrical equivalents. For enhanced performance options, AT24CS02-XHM-T offers substantial availability (15684 Pcs) with 1 MHz clock frequency and 550 ns access time.

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