24LC02BHT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC02BHT-I/ST is a 2Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, configured for I2C serial communication at 400 kHz clock frequency. This non-volatile memory device operates across a supply voltage range of 2.5V to 5.5V and is housed in an 8-TSSOP surface mount package. The part is currently active in production with 10,400 units in stock.

Equivalent and substitute parts are identified to address component availability, extended operating temperature requirements, higher clock frequency specifications, or alternative packaging formats while maintaining core functional compatibility within I2C EEPROM memory applications.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
Supply Voltage 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
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 24LC02BHT-I/ST are classified into three functional categories based on allowed electrical and mechanical parameters:

Category 1: Direct Functional Equivalents (400 kHz I2C, 2Kbit, 8-TSSOP) Parts maintaining identical clock frequency (400 kHz), memory capacity (2Kbit), and package format (8-TSSOP) with compatible supply voltage ranges. These parts differ primarily in supply voltage floor specifications and packaging format (Tape & Reel versus Cut Tape).

Category 2: Enhanced Performance Substitutes (1 MHz I2C, 2Kbit, 8-TSSOP) Parts operating at 1 MHz clock frequency with improved access time (550 ns versus 900 ns), maintaining 2Kbit capacity and 8-TSSOP package. These parts provide backward compatibility with 400 kHz I2C bus systems while offering higher performance capability.

Category 3: Extended Temperature Range Substitutes (400 kHz I2C, 2Kbit, 8-TSSOP) Parts maintaining 400 kHz clock frequency and 2Kbit capacity with extended operating temperature range to 125°C, suitable for industrial and automotive applications.

Substitution eligibility is determined by the following parameters: Memory Size (2Kbit), Memory Organization (256 x 8), Memory Interface (I2C), Package Type (8-TSSOP), Mounting Type (Surface Mount), and RoHS3 Compliance. Supply voltage range, clock frequency, access time, and operating temperature are secondary parameters that define performance tier compatibility.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Supply Voltage	Operating Temperature	Package	Inventory
24LC02BHT-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	10,400 Pcs
24AA024T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	2,100 Pcs
24AA02T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	3,592 Pcs
34AA02T-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	2,040 Pcs
AT24CS02-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	15,684 Pcs
AT24HC02C-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	5,546 Pcs
AT34C02D-XHM-T	Microchip Technology	2Kbit	1 MHz	Not Specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	7,447 Pcs
24LC024T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	10,400 Pcs
24LC025T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	1,946 Pcs
24LC02BT-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	7,900 Pcs
BR24G02FVT-3AGE2	Rohm Semiconductor	2Kbit	1 MHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	2,665 Pcs

Engineering Selection Recommendations

For Direct Replacement with Extended Low-Voltage Operation: The 24AA024T-I/ST and 24AA02T-I/ST are functionally equivalent to the 24LC02BHT-I/ST with identical clock frequency (400 kHz), access time (900 ns), and operating temperature range. Both parts extend the minimum supply voltage specification to 1.7V, enabling operation in low-power applications. Both parts are ROHS3 compliant with MSL 1 rating. The 24AA02T-I/ST offers higher inventory availability (3,592 units).

For Extended Industrial Temperature Range: The 34AA02T-E/ST maintains 400 kHz clock frequency and 900 ns access time while extending the maximum operating temperature to 125°C. This part is suitable for industrial and automotive environments requiring thermal performance beyond standard commercial specifications. ROHS3 compliance and MSL 1 rating are maintained.

For Enhanced Clock Frequency Performance: The AT24CS02-XHM-T, AT24HC02C-XHM-T, and AT34C02D-XHM-T operate at 1 MHz clock frequency with improved access time (550 ns). These parts provide backward compatibility with 400 kHz I2C bus systems while offering higher performance capability. All three parts support extended low-voltage operation (1.7V minimum). The AT24CS02-XHM-T offers the highest inventory availability (15,684 units) among enhanced frequency options.

For Packaging Format Alternatives: The 24LC024T-I/ST and 24LC02BT-I/ST are parametric equivalents with identical electrical specifications to the main part but available in Cut Tape (CT) & Digi-Reel® packaging format. These parts maintain 400 kHz clock frequency, 900 ns access time, and 2.5V to 5.5V supply voltage range.

For Alternative Manufacturer Supply: The BR24G02FVT-3AGE2 from Rohm Semiconductor operates at 1 MHz clock frequency with extended low-voltage operation (1.6V minimum). This part provides cross-manufacturer substitution capability while maintaining 2Kbit capacity and 8-TSSOP package format. ROHS3 compliance and MSL 1 rating are maintained.

All substitute parts listed maintain ROHS3 compliance, MSL 1 rating (except AT34C02D-XHM-T with MSL 3), and REACH unaffected status consistent with the main part specification.

Frequently Asked Questions (FAQ)

Q: Can the 24AA02T-I/ST replace the 24LC02BHT-I/ST in existing designs? A: Yes. Both parts share identical memory capacity (2Kbit), memory organization (256 x 8), I2C interface, clock frequency (400 kHz), access time (900 ns), write cycle time (5 ms), and operating temperature range (-40°C to 85°C). The 24AA02T-I/ST extends the minimum supply voltage to 1.7V, making it compatible with applications operating at 2.5V and above. Both parts are housed in 8-TSSOP packages and are ROHS3 compliant.

Q: What is the primary difference between 400 kHz and 1 MHz I2C EEPROM parts? A: Clock frequency determines the maximum I2C bus speed. The 24LC02BHT-I/ST operates at 400 kHz maximum bus speed with 900 ns access time. The 1 MHz parts (AT24CS02-XHM-T, AT24HC02C-XHM-T, AT34C02D-XHM-T, BR24G02FVT-3AGE2) support faster I2C communication with improved access time (550 ns). Both frequency classes are backward compatible; 1 MHz parts function correctly on 400 kHz I2C buses.

Q: Is the 34AA02T-E/ST suitable for automotive applications? A: The 34AA02T-E/ST extends the maximum operating temperature to 125°C, which addresses thermal requirements for industrial and automotive environments. The part maintains ROHS3 compliance and MSL 1 rating. Automotive qualification status is not specified in the provided parameters.

Q: What packaging formats are available for 2Kbit I2C EEPROM parts? A: The main part (24LC02BHT-I/ST) is supplied in Tape & Reel (TR) format. Equivalent parts are available in Cut Tape (CT) & Digi-Reel® packaging (24LC024T-I/ST, 24LC02BT-I/ST, 34AA02T-E/ST, AT24CS02-XHM-T, AT24HC02C-XHM-T, AT34C02D-XHM-T). All parts use the same 8-TSSOP physical package format (0.173", 4.40mm width).

Q: Can I use the BR24G02FVT-3AGE2 from Rohm Semiconductor as a substitute? A: Yes. The BR24G02FVT-3AGE2 maintains 2Kbit capacity, 256 x 8 organization, I2C interface, and 8-TSSOP package format. It operates at 1 MHz clock frequency with extended low-voltage operation (1.6V minimum). ROHS3 compliance and MSL 1 rating are maintained. The primary difference is the 1 MHz clock frequency versus the 400 kHz specification of the main part.

Q: What is the significance of MSL (Moisture Sensitivity Level) rating? A: MSL 1 indicates unlimited shelf life without moisture control requirements. MSL 3 (AT34C02D-XHM-T) requires moisture control with a 168-hour floor life limit after package opening. For applications with extended storage or humid environments, MSL 1 parts are preferred.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed maintain ROHS3 compliance consistent with the main part specification. REACH status is unaffected for all parts.

Q: Which substitute part offers the highest inventory availability? A: The AT24CS02-XHM-T offers 15,684 units in stock, the highest availability among all substitute options. This part operates at 1 MHz clock frequency with 550 ns access time and supports extended low-voltage operation (1.7V minimum).

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