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24C02CT-I/ST EEPROM Memory IC Equivalent & Substitute Parts
Part Overview
The 24C02CT-I/ST is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology, supplied in 8-TSSOP surface mount packaging. This non-volatile memory device operates at 400 kHz I2C clock frequency with 900 ns access time and is designed for applications requiring compact, reliable data storage. The part is currently active in production with 1003 units in stock and carries ROHS3 compliance certification. Substitute parts are identified to address inventory availability, extended operating temperature ranges, higher I2C clock frequencies, or alternative voltage supply specifications while maintaining core functional compatibility.
Substiute Parts
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 | 1 ms |
| Voltage Supply Range | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Package Type | 8-TSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict parameter matching across the following critical criteria:
Core Functional Requirements (Non-Negotiable):
- Memory Size: 2Kbit
- Memory Organization: 256 x 8
- Memory Interface: I2C
- Package Type: 8-TSSOP
- Mounting Type: Surface Mount
Allowed Variation Parameters:
- Clock Frequency: 400 kHz (main part) to 1 MHz (higher frequency acceptable)
- Access Time: 900 ns (main part) to 550 ns (faster acceptable)
- Write Cycle Time: 1 ms (main part) to 5 ms (longer acceptable)
- Voltage Supply Range: 4.5V ~ 5.5V (main part) to 1.6V ~ 5.5V (wider range acceptable)
- Operating Temperature: -40°C ~ 85°C (main part) to -40°C ~ 125°C (extended range acceptable)
All substitute parts listed maintain identical memory capacity, organization, I2C interface, and 8-TSSOP package specifications. Variations in clock frequency, access time, write cycle time, voltage range, and operating temperature represent functional enhancements or extended operational capabilities that do not compromise compatibility with the original design.
Parameter Comparison
| Part Number | Manufacturer | Clock Frequency | Access Time | Write Cycle Time | Voltage Supply | Operating Temperature | Packaging | Inventory |
|---|---|---|---|---|---|---|---|---|
| 24C02CT-I/ST | Microchip Technology | 400 kHz | 900 ns | 1 ms | 4.5V ~ 5.5V | -40°C ~ 85°C | Tape & Reel | 1003 Pcs |
| 24AA024T-I/ST | Microchip Technology | 400 kHz | 900 ns | 5 ms | 1.7V ~ 5.5V | -40°C ~ 85°C | Tape & Reel | 2100 Pcs |
| 24AA02T-I/ST | Microchip Technology | 400 kHz | 900 ns | 5 ms | 1.7V ~ 5.5V | -40°C ~ 85°C | Tape & Reel | 3592 Pcs |
| 24LC024T-I/ST | Microchip Technology | 400 kHz | 900 ns | 5 ms | 2.5V ~ 5.5V | -40°C ~ 85°C | Cut Tape & Digi-Reel | 10400 Pcs |
| 24LC025T-I/ST | Microchip Technology | 400 kHz | 900 ns | 5 ms | 2.5V ~ 5.5V | -40°C ~ 85°C | Tape & Reel | 1946 Pcs |
| 24LC02BT-I/ST | Microchip Technology | 400 kHz | 900 ns | 5 ms | 2.5V ~ 5.5V | -40°C ~ 85°C | Cut Tape & Digi-Reel | 7900 Pcs |
| 34AA02T-E/ST | Microchip Technology | 400 kHz | 900 ns | 5 ms | 1.7V ~ 5.5V | -40°C ~ 125°C | Tape & Reel | 2040 Pcs |
| AT24CS02-XHM-T | Microchip Technology | 1 MHz | 550 ns | 5 ms | 1.7V ~ 5.5V | -40°C ~ 85°C | Cut Tape & Digi-Reel | 15684 Pcs |
| AT24HC02C-XHM-T | Microchip Technology | 1 MHz | 550 ns | 5 ms | 1.7V ~ 5.5V | -40°C ~ 85°C | Cut Tape & Digi-Reel | 5546 Pcs |
| AT34C02D-XHM-T | Microchip Technology | 1 MHz | Not Specified | 5 ms | 1.7V ~ 5.5V | -40°C ~ 85°C | Cut Tape & Digi-Reel | 7447 Pcs |
| BR24G02FVT-3AGE2 | Rohm Semiconductor | 1 MHz | Not Specified | 5 ms | 1.6V ~ 5.5V | -40°C ~ 85°C | Tape & Reel | 2665 Pcs |
Engineering Selection Recommendations
Direct Functional Equivalents (400 kHz I2C, 900 ns Access Time):
The 24AA024T-I/ST, 24AA02T-I/ST, 24LC024T-I/ST, 24LC025T-I/ST, and 24LC02BT-I/ST maintain identical I2C clock frequency and access time specifications to the 24C02CT-I/ST. These parts differ in voltage supply range and write cycle time. Selection among these options depends on system voltage requirements: the 24AA series supports 1.7V minimum supply, while the 24LC series requires 2.5V minimum. All are ROHS3 compliant and active in production.
Extended Temperature Range Option:
The 34AA02T-E/ST provides identical 400 kHz I2C and 900 ns access time performance with extended operating temperature range to -40°C ~ 125°C, compared to the standard -40°C ~ 85°C. This part is suitable for applications requiring high-temperature operation while maintaining the original clock and access specifications.
Higher Clock Frequency Options (1 MHz I2C):
The AT24CS02-XHM-T, AT24HC02C-XHM-T, AT34C02D-XHM-T, and BR24G02FVT-3AGE2 operate at 1 MHz I2C clock frequency with faster access times (550 ns where specified). These parts provide enhanced performance for applications requiring higher data transfer rates. The AT24 series are Microchip products with 1.7V minimum supply voltage. The BR24G02FVT-3AGE2 is a Rohm Semiconductor alternative with 1.6V minimum supply voltage. All maintain ROHS3 compliance and active production status.
Inventory Availability:
The 24LC024T-I/ST offers the highest inventory level at 10400 units, followed by AT24CS02-XHM-T at 15684 units, providing supply security for high-volume applications.
Frequently Asked Questions (FAQ)
Q: Can I substitute the 24C02CT-I/ST with a 24LC024T-I/ST in my existing design?
A: Yes. Both parts maintain identical 2Kbit memory capacity, 256 x 8 organization, I2C interface, 400 kHz clock frequency, 900 ns access time, and 8-TSSOP package. The 24LC024T-I/ST requires a minimum supply voltage of 2.5V compared to 4.5V for the 24C02CT-I/ST. If your system operates above 2.5V, this substitution is functionally compatible.
Q: What is the difference between the 24AA02T-I/ST and 24LC02BT-I/ST?
A: Both parts share identical I2C clock frequency (400 kHz), access time (900 ns), and 8-TSSOP package. The 24AA02T-I/ST supports a wider voltage supply range (1.7V ~ 5.5V) compared to the 24LC02BT-I/ST (2.5V ~ 5.5V). The 24AA02T-I/ST is supplied in Tape & Reel packaging with 3592 units in stock, while the 24LC02BT-I/ST is supplied in Cut Tape & Digi-Reel packaging with 7900 units in stock.
Q: When should I use the AT24CS02-XHM-T instead of the 24C02CT-I/ST?
A: The AT24CS02-XHM-T operates at 1 MHz I2C clock frequency with 550 ns access time, compared to the 24C02CT-I/ST at 400 kHz and 900 ns. Select the AT24CS02-XHM-T when your application requires higher I2C data transfer rates. Both parts maintain identical 2Kbit capacity and 8-TSSOP package. The AT24CS02-XHM-T supports 1.7V minimum supply voltage, providing wider voltage compatibility.
Q: Is the BR24G02FVT-3AGE2 from Rohm Semiconductor compatible with my Microchip-based design?
A: Yes. The BR24G02FVT-3AGE2 maintains identical 2Kbit memory capacity, 256 x 8 organization, I2C interface, 1 MHz clock frequency, and 8-TSSOP package. It is a cross-manufacturer substitute offering equivalent functionality. The part supports 1.6V minimum supply voltage and is ROHS3 compliant. Verify I2C address configuration compatibility with your system design.
Q: What is the advantage of the 34AA02T-E/ST for my application?
A: The 34AA02T-E/ST provides extended operating temperature range to -40°C ~ 125°C, compared to the standard -40°C ~ 85°C of the 24C02CT-I/ST. If your application requires operation in high-temperature environments, this part maintains identical 400 kHz I2C clock frequency, 900 ns access time, and 8-TSSOP package while supporting the extended temperature specification.
Q: Can I use a 1 MHz I2C part as a drop-in replacement for a 400 kHz part?
A: Yes. Parts operating at higher I2C clock frequencies (1 MHz) are backward compatible with 400 kHz I2C systems. The I2C bus will operate at the lower frequency determined by the master controller. However, verify that your system design does not depend on specific timing characteristics of the 400 kHz specification before substitution.
Q: What packaging options are available for 2Kbit I2C EEPROM substitutes?
A: All listed substitute parts are supplied in 8-TSSOP surface mount packages. Packaging format options include Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel. The 24LC024T-I/ST and 24LC02BT-I/ST are supplied in Cut Tape & Digi-Reel format, while most other parts are supplied in Tape & Reel format. Verify packaging compatibility with your assembly process requirements.
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