Equivalent & Substitute Parts for 24C02CT/SN EEPROM Memory IC

Part Overview

The 24C02CT/SN is a 2Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for I2C serial communication applications. This non-volatile memory device operates at 400 kHz clock frequency with 3.5 µs access time and is packaged in an 8-SOIC surface mount configuration. The part is currently active in production with 33,300 units in stock inventory.

Substitute parts are necessary when the original 24C02CT/SN becomes unavailable, when alternative voltage supply ranges are required for system flexibility, when extended temperature operating ranges are needed for harsh environments, or when faster access times and higher clock frequencies improve system performance requirements.

Key Parameters

Parameter	Value	Unit
Memory Type	Non-Volatile EEPROM	—
Memory Size	2Kbit	—
Memory Organization	256 x 8	—
Memory Interface	I2C	—
Clock Frequency	400	kHz
Access Time	3.5	µs
Write Cycle Time	1.5	ms
Voltage Supply Range	4.5 to 5.5	V
Operating Temperature	0 to 70	°C
Mounting Type	Surface Mount	—
Package	8-SOIC (0.154", 3.90mm Width)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution compatibility for the 24C02CT/SN is determined by the following critical parameters:

Core Compatibility Requirements:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: I2C serial protocol
Package Type: 8-SOIC surface mount form factor
Mounting Type: Surface mount technology

Performance Parameters Affecting Substitution:

Clock Frequency: 400 kHz (minimum requirement for direct substitution)
Access Time: 3.5 µs or faster
Write Cycle Time: 1.5 ms or faster
Voltage Supply Range: Must encompass 4.5V to 5.5V minimum
Operating Temperature: Must support 0°C to 70°C minimum range

Compliance & Environmental:

RoHS3 Compliance: Required
REACH Status: Unaffected
Moisture Sensitivity Level: 1 or 3 acceptable

Substitute parts are grouped into three categories based on parameter compatibility:

Category 1 - Direct Substitutes (Identical Electrical Performance): Parts with matching clock frequency (400 kHz), access time (3.5 µs or 900 ns), write cycle time, and voltage range 4.5V to 5.5V.

Category 2 - Enhanced Performance Substitutes (Improved Specifications): Parts with faster access times (900 ns), extended voltage supply ranges (1.7V to 5.5V or 2.5V to 5.5V), or extended temperature ranges (-40°C to 85°C or -40°C to 125°C).

Category 3 - High-Speed Substitutes (Higher Clock Frequency): Parts operating at 1 MHz clock frequency with 400 ns access time, suitable for applications requiring faster I2C communication.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency (kHz)	Access Time (µs/ns)	Write Cycle (ms)	Voltage Supply (V)	Temp Range (°C)	Package	Packaging Type	Inventory (Pcs)
24C02CT/SN	Microchip	2Kbit	400	3.5 µs	1.5	4.5–5.5	0–70	8-SOIC	Cut Tape	33300
24C02C/SN	Microchip	2Kbit	400	3.5 µs	1.5	4.5–5.5	0–70	8-SOIC	Tube	4130
24AA024T-I/SN	Microchip	2Kbit	400	900 ns	5	1.7–5.5	−40–85	8-SOIC	Tape & Reel	3700
24AA025T-I/SN	Microchip	2Kbit	400	900 ns	5	1.7–5.5	−40–85	8-SOIC	Tape & Reel	4138
24AA02T-I/SN	Microchip	2Kbit	400	900 ns	5	1.7–5.5	−40–85	8-SOIC	Cut Tape	6640
24AA02T/SN	Microchip	2Kbit	400	900 ns	5	1.7–5.5	0–70	8-SOIC	Tape & Reel	2672
24C02CT-E/SN	Microchip	2Kbit	100	3.5 µs	1.5	4.5–5.5	−40–125	8-SOIC	Tape & Reel	4283
24C02CT-I/SN	Microchip	2Kbit	400	900 ns	1	4.5–5.5	−40–85	8-SOIC	Cut Tape	15731
24LC024HT-I/SN	Microchip	2Kbit	1000	400 ns	5	2.5–5.5	−40–85	8-SOIC	Tape & Reel	16889
24LC024T-I/SN	Microchip	2Kbit	400	900 ns	5	2.5–5.5	−40–85	8-SOIC	Cut Tape	10300
24LC02B-I/SNG	Microchip	2Kbit	400	900 ns	5	2.5–5.5	−40–85	8-SOIC	Tube	1900

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

The 24C02C/SN is the primary direct substitute, offering identical electrical and thermal specifications to the 24C02CT/SN. The only difference is packaging format: 24C02C/SN is supplied in Tube packaging while 24C02CT/SN uses Cut Tape & Digi-Reel format. Both parts are ROHS3 compliant with MSL 1 rating and support the same 4.5V to 5.5V supply voltage and 0°C to 70°C operating temperature range. Selection between these two depends solely on assembly line packaging requirements.

For Extended Temperature Range Applications:

The 24C02CT-E/SN extends the operating temperature range to −40°C to 125°C while maintaining 4.5V to 5.5V supply voltage compatibility. However, this part operates at 100 kHz clock frequency, which is slower than the original 400 kHz specification. This part is suitable only when extended temperature operation is critical and reduced I2C communication speed is acceptable.

For Enhanced Performance with Wider Voltage Range:

The 24AA02T-I/SN, 24AA02T/SN, 24AA024T-I/SN, and 24AA025T-I/SN all provide faster 900 ns access time and extended voltage supply range of 1.7V to 5.5V. These parts maintain 400 kHz clock frequency and 2Kbit capacity. The 24AA02T-I/SN and 24AA02T/SN differ in packaging (Cut Tape vs. Tape & Reel) and temperature range (−40°C to 85°C vs. 0°C to 70°C). These substitutes are suitable for systems requiring lower supply voltage operation or improved access time performance.

For High-Speed I2C Applications:

The 24LC024HT-I/SN operates at 1 MHz clock frequency with 400 ns access time, providing the fastest I2C communication among available substitutes. Supply voltage range is 2.5V to 5.5V, and operating temperature is −40°C to 85°C. This part is suitable for applications requiring high-speed serial communication while maintaining 2Kbit memory capacity.

For Standard Performance with Lower Voltage Support:

The 24LC024T-I/SN and 24LC02B-I/SNG both support 2.5V to 5.5V supply voltage with 400 kHz clock frequency and 900 ns access time. These parts are suitable for systems operating at lower supply voltages while maintaining compatibility with the original 400 kHz I2C specification.

Compliance Verification:

All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Moisture sensitivity levels range from MSL 1 (Unlimited) to MSL 3 (168 Hours), which affects storage and handling procedures during assembly.

Frequently Asked Questions (FAQ)

Q1: Can I substitute 24C02CT/SN with 24C02C/SN directly in my application?

A: Yes. Both parts have identical electrical specifications: 2Kbit EEPROM, 400 kHz I2C interface, 3.5 µs access time, 4.5V to 5.5V supply voltage, and 0°C to 70°C operating temperature. The only difference is packaging format (Cut Tape vs. Tube). Substitution is valid if your assembly equipment can accommodate the different packaging type.

Q2: What is the key difference between 24AA02T-I/SN and 24C02CT/SN?

A: The 24AA02T-I/SN has three primary differences: (1) faster access time of 900 ns versus 3.5 µs, (2) extended voltage supply range of 1.7V to 5.5V versus 4.5V to 5.5V, and (3) extended operating temperature range of −40°C to 85°C versus 0°C to 70°C. All other parameters including 2Kbit capacity, 400 kHz clock frequency, and 8-SOIC package remain identical.

Q3: Can I use 24LC024HT-I/SN as a substitute for 24C02CT/SN?

A: Yes, with performance enhancement. The 24LC024HT-I/SN maintains 2Kbit capacity and 8-SOIC package but operates at 1 MHz clock frequency (versus 400 kHz) with 400 ns access time (versus 3.5 µs). Supply voltage range is 2.5V to 5.5V (compatible with the original 4.5V to 5.5V requirement). This substitution improves I2C communication speed and supports lower supply voltages.

Q4: Why does 24C02CT-E/SN have a lower clock frequency than the original part?

A: The 24C02CT-E/SN is designed for extended temperature operation (−40°C to 125°C) and operates at 100 kHz clock frequency. This reduced speed is a design trade-off to maintain reliability across the wider temperature range. This part is suitable only when extended temperature capability is essential and reduced I2C communication speed is acceptable.

Q5: What does MSL 1 versus MSL 3 mean for component handling?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. MSL 3 requires storage in controlled humidity conditions (168 hours maximum exposure to 85% relative humidity at 85°C before reflow soldering). Parts with MSL 1 (24C02CT/SN, 24C02C/SN, 24AA02T-I/SN, 24AA02T/SN, 24LC024HT-I/SN, 24LC02B-I/SNG) have less stringent handling requirements than MSL 3 parts (24AA025T-I/SN, 24C02CT-I/SN, 24LC024T-I/SN).

Q6: Which substitute part has the widest voltage supply range?

A: The 24AA024T-I/SN, 24AA025T-I/SN, 24AA02T-I/SN, and 24AA02T/SN all support 1.7V to 5.5V supply voltage, which is the widest range available. This allows operation in systems with lower supply voltages while remaining compatible with standard 5V systems.

Q7: Are all substitute parts available in Cut Tape packaging like the original 24C02CT/SN?

A: No. Cut Tape & Digi-Reel packaging is available for 24C02CT/SN, 24AA02T-I/SN, 24C02CT-I/SN, and 24LC024T-I/SN. Other substitutes are supplied in Tube or Tape & Reel formats. Verify packaging compatibility with your assembly equipment before selection.

Q8: What is the inventory status of substitute parts?

A: Current inventory levels are: 24LC024HT-I/SN (16,889 pcs), 24C02CT-I/SN (15,731 pcs), 24LC024T-I/SN (10,300 pcs), 24AA02T-I/SN (6,640 pcs), 24AA025T-I/SN (4,138 pcs), 24C02CT-E/SN (4,283 pcs), 24C02C/SN (4,130 pcs), 24AA024T-I/SN (3,700 pcs), 24AA02T/SN (2,672 pcs), and 24LC02B-I/SNG (1,900 pcs). Inventory levels may change; verify current availability with your supplier.

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