24LC024T-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC024T-E/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 supports a supply voltage range of 2.5V to 5.5V across an operating temperature range of -40°C to 125°C. The device is ROHS3 compliant and currently in active production status with verified programmability through DiGi-Electronics. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	24LC024T-E/ST
Manufacturer	Microchip Technology
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Supply Voltage Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 24LC024T-E/ST are qualified based on the following critical parameters:

Core Compatibility Criteria:

Memory capacity: 2Kbit (256 x 8 organization)
Interface protocol: I2C serial communication
Package type: 8-TSSOP surface mount form factor
Pin count and pinout: 8-pin configuration
Supply voltage compatibility: Minimum 2.5V support required
Operating temperature range: Minimum -40°C to 85°C support

Substitution Categories:

Category 1 - Direct Functional Equivalents (Identical Specifications): Parts matching all electrical parameters including 400 kHz I2C clock frequency, 900 ns access time, 5ms write cycle time, and 2.5V minimum supply voltage.

Category 2 - Enhanced Performance Substitutes (Higher Clock Frequency): Parts operating at 1 MHz I2C clock frequency with 450 ns access time and 4ms write cycle time, providing faster operation while maintaining backward compatibility with 400 kHz systems.

Category 3 - Extended Supply Voltage Range (Lower Minimum Voltage): Parts with supply voltage ranges starting at 1.6V or 1.7V, enabling operation in lower-power applications while maintaining upper voltage compatibility.

Category 4 - Automotive Grade Alternatives: Parts qualified to AEC-Q100 automotive standards with extended temperature support to 125°C, suitable for automotive and industrial applications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	I2C Frequency	Access Time	Write Cycle	Supply Voltage	Temp Range	Package	Status
24LC024T-E/ST	Microchip	2Kbit	400 kHz	900 ns	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
34AA02T-E/ST	Microchip	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
BR24G02FVT-3GE2	Rohm Semiconductor	2Kbit	400 kHz	N/A	5ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
BR34E02FVT-3E2	Rohm Semiconductor	2Kbit	400 kHz	N/A	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
M24C02-DRDW3TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	4ms	1.8V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
M24C02-DRDW8TP/K	STMicroelectronics	2Kbit	1 MHz	450 ns	4ms	1.8V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	Active
M24C02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
M34E02-FDW6TP	STMicroelectronics	2Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
R1EX24002ATAS0I#U0	Renesas Electronics	2Kbit	400 kHz	900 ns	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
CAV24C02YE-GT3	onsemi	2Kbit	400 kHz	900 ns	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance): The 34AA02T-E/ST from Microchip Technology provides direct functional equivalence with identical I2C clock frequency, access time, and write cycle specifications. This part extends the minimum supply voltage to 1.7V, enabling operation in lower-voltage applications while maintaining full compatibility with 2.5V to 5.5V systems. Both parts support the full -40°C to 125°C temperature range and are ROHS3 compliant.

Automotive-Grade Alternative: The CAV24C02YE-GT3 from onsemi matches the original part's electrical specifications exactly and includes AEC-Q100 automotive qualification. This part is suitable for applications requiring automotive-grade components while maintaining identical performance characteristics and temperature range support.

Enhanced Performance Option: The M24C02-DRDW3TP/K from STMicroelectronics operates at 1 MHz I2C frequency with 450 ns access time and 4ms write cycle time, providing faster operation than the original 400 kHz specification. This part maintains -40°C to 125°C temperature range and AEC-Q100 automotive qualification. The M24C02-DRDW8TP/K variant supports -40°C to 105°C temperature range with identical electrical performance.

Extended Low-Voltage Operation: The BR24G02FVT-3GE2 from Rohm Semiconductor supports supply voltage as low as 1.6V, the lowest minimum voltage among available substitutes. This part is suitable for battery-powered and ultra-low-power applications. Operating temperature range is limited to -40°C to 85°C.

Verified Programmability: The M34E02-FDW6TP from STMicroelectronics carries DiGi-Electronics verified programmability status, matching the original part's verification status. This part operates at 400 kHz with 900 ns access time and supports 1.7V to 5.5V supply voltage across -40°C to 85°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher I2C clock frequency (1 MHz) in place of the 400 kHz original?

A: Yes. Parts operating at 1 MHz I2C frequency are backward compatible with 400 kHz systems. The higher clock frequency provides faster operation without affecting compatibility with existing 400 kHz I2C bus implementations. The M24C02-DRDW3TP/K and M24C02-DRDW8TP/K from STMicroelectronics are suitable for this application.

Q: What is the significance of the supply voltage range difference between 2.5V and 1.6V minimum?

A: The original 24LC024T-E/ST requires minimum 2.5V supply voltage. Substitute parts with lower minimum voltages (1.6V to 1.8V) can operate in applications with lower power supplies, such as battery-powered devices. However, all parts maintain compatibility with the 5.5V maximum voltage, ensuring operation across standard 3.3V and 5V logic systems.

Q: Are all substitute parts available in the same 8-TSSOP package?

A: All listed substitute parts use 8-TSSOP surface mount packaging with identical 0.173" width and 4.40mm dimensions. The Rohm Semiconductor parts (BR24G02FVT-3GE2 and BR34E02FVT-3E2) use the 8-TSSOP-B variant, which maintains pin-compatible footprint compatibility with standard 8-TSSOP designs.

Q: Which substitute part best matches the original 24LC024T-E/ST specifications?

A: The 34AA02T-E/ST from Microchip Technology provides the closest match with identical I2C frequency (400 kHz), access time (900 ns), write cycle time (5ms), and operating temperature range (-40°C to 125°C). The primary difference is extended low-voltage support starting at 1.7V instead of 2.5V.

Q: Do all substitute parts have ROHS3 compliance?

A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the original part's environmental compliance requirements. All parts also maintain MSL rating of 1 (Unlimited) moisture sensitivity level.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Both packaging formats contain identical components in 8-TSSOP surface mount packages. Tape & Reel (TR) packaging is supplied on continuous reels suitable for high-volume automated assembly. Cut Tape (CT) packaging is supplied in smaller quantities on tape strips, suitable for lower-volume applications and manual assembly. Electrical and functional specifications remain identical regardless of packaging format.

Q: Can I substitute the original part with one having a lower maximum operating temperature (85°C instead of 125°C)?

A: Substitution is valid only if your application's maximum operating temperature does not exceed 85°C. If your design requires operation up to 125°C, parts limited to 85°C maximum temperature are not suitable. The 34AA02T-E/ST, M24C02-DRDW3TP/K, and CAV24C02YE-GT3 support the full 125°C maximum temperature range.

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