24LC02B-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC02B-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 clock frequency with 900 ns access time and supports supply voltages from 2.5V to 5.5V across the -40°C to 85°C operating temperature range. The part is ROHS3 compliant and carries Active product status with verified programmability certification.

Equivalent and substitute parts are identified when design requirements permit relaxed electrical specifications, alternative packaging formats, or higher performance variants that maintain functional compatibility within the I2C EEPROM 2Kbit category.

Key Parameters

Parameter	24LC02B-I/ST
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Memory Size: 2Kbit
Memory Organization: 256 x 8
Memory Interface: I2C
Package / Case: 8-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount
Operating Temperature: -40°C ~ 85°C

Allowable Variation Parameters:

Clock Frequency: 400 kHz (baseline) to 1 MHz (higher performance acceptable)
Access Time: 900 ns (baseline) to 400 ns (faster acceptable)
Voltage Supply Range: 2.5V ~ 5.5V (baseline) to 1.7V ~ 5.5V (wider range acceptable) or 1.6V ~ 5.5V (wider range acceptable)
Packaging Format: Tube, Cut Tape & Digi-Reel, Tape & Reel, or Bulk (format variation acceptable)

Substitutes are grouped into three categories: Direct Manufacturer Equivalents (identical electrical specifications, packaging format variation only), Manufacturer Recommended Alternatives (higher performance or wider voltage range), and Parametric Equivalents (identical core specifications).

Parameter Comparison

Part Number	Manufacturer	Clock Frequency	Access Time	Voltage Supply	Package Format	Product Status	Programmable Verified
24LC02B-I/ST	Microchip Technology	400 kHz	900 ns	2.5V ~ 5.5V	Tube	Active	Yes
24LC02BT-I/ST	Microchip Technology	400 kHz	900 ns	2.5V ~ 5.5V	Cut Tape & Digi-Reel	Active	Yes
24AA02-I/ST	Microchip Technology	400 kHz	900 ns	1.7V ~ 5.5V	Tube	Active	No
24AA024-I/ST	Microchip Technology	400 kHz	900 ns	1.7V ~ 5.5V	Tube	Active	No
24LC024H-I/ST	Microchip Technology	1 MHz	400 ns	2.5V ~ 5.5V	Tube	Active	No
AT24CS02-XHM-T	Microchip Technology	1 MHz	550 ns	1.7V ~ 5.5V	Cut Tape & Digi-Reel	Active	No
AT24HC02C-XHM-B	Microchip Technology	1 MHz	550 ns	1.7V ~ 5.5V	Bulk	Active	No
24LC024-I/ST	Microchip Technology	400 kHz	900 ns	2.5V ~ 5.5V	Tube	Active	Yes
24LC025-I/ST	Microchip Technology	400 kHz	900 ns	2.5V ~ 5.5V	Tube	Active	No
BR24G02FVT-3AGE2	Rohm Semiconductor	1 MHz	Not Specified	1.6V ~ 5.5V	Tape & Reel	Active	No
BR24G02FVT-3GE2	Rohm Semiconductor	400 kHz	Not Specified	1.6V ~ 5.5V	Tape & Reel	Active	No

Engineering Selection Recommendations

Direct Substitution (Verified Compatibility): The 24LC02BT-I/ST provides identical electrical specifications to the 24LC02B-I/ST with verified programmability certification. Selection between these parts depends solely on packaging format requirements: Tube for individual component handling or Cut Tape & Digi-Reel for automated assembly processes.

The 24LC024-I/ST and 24LC025-I/ST maintain identical electrical performance and package specifications. The 24LC024-I/ST carries verified programmability certification, while 24LC025-I/ST does not. Both are Active status products suitable for direct substitution where programmability verification is not a design requirement.

Higher Performance Alternatives: The 24LC024H-I/ST, AT24CS02-XHM-T, and AT24HC02C-XHM-B operate at 1 MHz clock frequency with reduced access times (400 ns and 550 ns respectively), providing performance headroom for timing-critical applications. These parts maintain the 2.5V minimum supply voltage requirement of the baseline part or offer extended voltage ranges (1.7V minimum). All three are Active status products.

Extended Voltage Range Alternatives: The 24AA02-I/ST and 24AA024-I/ST support 1.7V minimum supply voltage compared to the 2.5V baseline, enabling operation in low-power applications. Electrical performance remains identical at 400 kHz and 900 ns access time. Both are Active status and Tube packaged.

Cross-Manufacturer Alternatives: The BR24G02FVT-3AGE2 and BR24G02FVT-3GE2 from Rohm Semiconductor provide 2Kbit I2C EEPROM functionality in 8-TSSOP-B packaging with 1.6V minimum supply voltage. The 3AGE2 variant operates at 1 MHz, while the 3GE2 variant operates at 400 kHz. Both are Active status products supplied in Tape & Reel format.

Frequently Asked Questions (FAQ)

Q: Can I substitute 24LC02B-I/ST with 24AA02-I/ST? A: Yes. Both parts share identical memory capacity (2Kbit), organization (256 x 8), I2C interface, clock frequency (400 kHz), access time (900 ns), and 8-TSSOP package. The 24AA02-I/ST extends the minimum supply voltage to 1.7V, making it suitable for applications requiring lower voltage operation. Both maintain -40°C to 85°C operating temperature and ROHS3 compliance.

Q: What is the difference between 24LC02BT-I/ST and 24LC02B-I/ST? A: These parts are electrically identical. The difference is packaging format: 24LC02B-I/ST is supplied in Tube format for manual handling, while 24LC02BT-I/ST is supplied in Cut Tape & Digi-Reel format for automated assembly. Both carry verified programmability certification and Active product status.

Q: Can I use 24LC024H-I/ST as a drop-in replacement? A: Yes, with performance benefits. The 24LC024H-I/ST maintains identical memory specifications and 8-TSSOP package but operates at 1 MHz clock frequency with 400 ns access time compared to the baseline 400 kHz and 900 ns. This provides faster operation while maintaining 2.5V to 5.5V supply voltage compatibility and -40°C to 85°C temperature range.

Q: Are Rohm BR24G02 parts compatible with Microchip 24LC02B-I/ST? A: Yes. Both BR24G02FVT-3AGE2 and BR24G02FVT-3GE2 maintain 2Kbit capacity, 256 x 8 organization, I2C interface, and 8-TSSOP package footprint. The 3GE2 variant matches the baseline 400 kHz frequency, while 3AGE2 operates at 1 MHz. Both support 1.6V to 5.5V supply voltage and -40°C to 85°C temperature range. Packaging is Tape & Reel format.

Q: What does "Programmable Verified" mean? A: Programmable Verified indicates the part has been tested and certified by the supplier for programming functionality. Parts without this designation have not undergone this specific verification step, though they maintain the same electrical specifications and functional design.

Q: Can I mix packaging formats in production? A: Packaging format selection depends on assembly process requirements. Tube format suits manual or low-volume assembly. Cut Tape & Digi-Reel and Tape & Reel formats are designed for automated pick-and-place equipment. Electrical performance is identical across all packaging formats for equivalent part numbers.

Q: Which substitute offers the widest voltage range? A: The 24AA02-I/ST, 24AA024-I/ST, AT24CS02-XHM-T, AT24HC02C-XHM-B, BR24G02FVT-3AGE2, and BR24G02FVT-3GE2 all support 1.7V to 5.5V or 1.6V to 5.5V supply voltage ranges, compared to the baseline 2.5V to 5.5V. These parts enable operation in battery-powered or low-voltage applications.

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