24LC02BT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC02BT-I/ST is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology, supplied in Cut Tape (CT) & Digi-Reel® 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. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching core electrical parameters: 2Kbit memory capacity, I2C interface, 256 x 8 memory organization, 8-TSSOP package, and compatible operating temperature ranges.

Key Parameters

Parameter	24LC02BT-I/ST Value
Memory Size	2Kbit
Memory Format	EEPROM
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
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
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped into three categories based on electrical and mechanical compatibility with the 24LC02BT-I/ST:

Direct Substitutes (Identical Electrical Parameters): Parts matching all core parameters including 2Kbit capacity, I2C interface, 400 kHz clock frequency, 900 ns access time, 2.5V–5.5V supply voltage, and -40°C to 85°C operating temperature range. These parts are pin-compatible and functionally equivalent with identical performance characteristics.

Manufacturer Recommended Substitutes (Extended Supply Voltage or Temperature): Parts with 2Kbit capacity, I2C interface, 256 x 8 organization, and 8-TSSOP package but with extended supply voltage range (1.7V–5.5V) or extended operating temperature range (-40°C to 125°C). These parts offer broader operational margins while maintaining core functionality.

Parametric Equivalents (Packaging Variation): Parts with identical electrical specifications but different packaging formats (Tape & Reel vs. Cut Tape). These maintain full functional compatibility with alternative supply chain options.

Higher Performance Alternatives (1 MHz Clock Frequency): Parts with 2Kbit capacity, I2C interface, and 8-TSSOP package but operating at 1 MHz clock frequency with 550 ns access time. These provide faster I2C communication while maintaining backward compatibility in most applications.

Cross-Manufacturer Alternatives (Rohm Semiconductor): Non-Microchip parts meeting 2Kbit, I2C, 256 x 8, and 8-TSSOP requirements with 1 MHz operation and extended supply voltage range (1.6V–5.5V).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Supply Voltage	Operating Temp	Package	Packaging Type	Product Status	MSL Rating
24LC02BT-I/ST	Microchip	2Kbit	400 kHz	900 ns	2.5V–5.5V	-40°C–85°C	8-TSSOP	Cut Tape & Digi-Reel	Active	1
24LC02B-I/ST	Microchip	2Kbit	400 kHz	900 ns	2.5V–5.5V	-40°C–85°C	8-TSSOP	Tube	Active	1
24AA024T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V–5.5V	-40°C–85°C	8-TSSOP	Tape & Reel	Active	1
24AA02T-I/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V–5.5V	-40°C–85°C	8-TSSOP	Tape & Reel	Active	1
34AA02T-E/ST	Microchip	2Kbit	400 kHz	900 ns	1.7V–5.5V	-40°C–125°C	8-TSSOP	Tape & Reel	Active	1
AT24CS02-XHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V–5.5V	-40°C–85°C	8-TSSOP	Cut Tape & Digi-Reel	Active	1
AT24HC02C-XHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V–5.5V	-40°C–85°C	8-TSSOP	Cut Tape & Digi-Reel	Active	1
AT34C02D-XHM-T	Microchip	2Kbit	1 MHz	N/A	1.7V–5.5V	-40°C–85°C	8-TSSOP	Cut Tape & Digi-Reel	Active	3
24LC024T-I/ST	Microchip	2Kbit	400 kHz	900 ns	2.5V–5.5V	-40°C–85°C	8-TSSOP	Cut Tape & Digi-Reel	Active	1
24LC025T-I/ST	Microchip	2Kbit	400 kHz	900 ns	2.5V–5.5V	-40°C–85°C	8-TSSOP	Tape & Reel	Active	1
BR24G02FVT-3AGE2	Rohm Semiconductor	2Kbit	1 MHz	N/A	1.6V–5.5V	-40°C–85°C	8-TSSOP	Tape & Reel	Active	1

Engineering Selection Recommendations

For Direct Functional Replacement: Select 24LC02B-I/ST, 24LC024T-I/ST, or 24LC025T-I/ST. These parts maintain identical electrical specifications and 8-TSSOP package compatibility. Packaging format (Cut Tape, Tube, or Tape & Reel) should be selected based on assembly process requirements.

For Extended Supply Voltage Margin: Select 24AA024T-I/ST or 24AA02T-I/ST. These parts support 1.7V minimum supply voltage compared to 2.5V for the main part, providing additional operational margin in low-voltage applications while maintaining identical clock frequency and access time.

For Extended Temperature Range: Select 34AA02T-E/ST for applications requiring operation to 125°C. This part maintains 400 kHz clock frequency and 900 ns access time with extended temperature capability.

For Higher I2C Clock Frequency: Select AT24CS02-XHM-T or AT24HC02C-XHM-T for applications requiring 1 MHz I2C operation. These parts provide 550 ns access time and 1.7V–5.5V supply voltage range. Both are Active status with MSL 1 rating.

For Cross-Manufacturer Alternative: Select BR24G02FVT-3AGE2 (Rohm Semiconductor) for 1 MHz operation with 1.6V–5.5V supply voltage range. This part offers extended supply voltage margin and higher clock frequency in an 8-TSSOP package.

Compliance Considerations: All listed parts are ROHS3 compliant and REACH unaffected. MSL 1 rating applies to most parts except AT34C02D-XHM-T (MSL 3, 168 hours). Product status is Active for all parts, ensuring continued availability and support.

Frequently Asked Questions (FAQ)

Q: Can 24LC02B-I/ST replace 24LC02BT-I/ST directly? A: Yes. Both parts are identical in electrical specifications (2Kbit, 400 kHz, 900 ns access time, 2.5V–5.5V supply, -40°C to 85°C operating range) and 8-TSSOP package. The difference is packaging format: 24LC02B-I/ST is supplied in Tube while 24LC02BT-I/ST is Cut Tape & Digi-Reel. Selection depends on assembly process compatibility.

Q: What is the difference between 24AA02T-I/ST and 24LC02BT-I/ST? A: Both are 2Kbit I2C EEPROMs with identical clock frequency (400 kHz), access time (900 ns), and operating temperature (-40°C to 85°C). The key difference is supply voltage range: 24AA02T-I/ST supports 1.7V–5.5V while 24LC02BT-I/ST supports 2.5V–5.5V. The 24AA02T-I/ST is supplied in Tape & Reel packaging.

Q: Can I use AT24CS02-XHM-T as a substitute for 24LC02BT-I/ST? A: Yes, with performance enhancement. AT24CS02-XHM-T maintains 2Kbit capacity, I2C interface, and 8-TSSOP package but operates at 1 MHz clock frequency (versus 400 kHz) with 550 ns access time (versus 900 ns). Supply voltage range is 1.7V–5.5V. This part is backward compatible and provides faster I2C communication.

Q: What is the significance of MSL rating differences? A: Most parts listed have MSL 1 (Unlimited moisture sensitivity level), meaning no moisture bake-out is required before soldering. AT34C02D-XHM-T has MSL 3 (168 hours), requiring moisture control during storage and a bake-out procedure before assembly. MSL 1 parts offer simpler handling and storage requirements.

Q: Is BR24G02FVT-3AGE2 from Rohm Semiconductor pin-compatible with 24LC02BT-I/ST? A: Yes. BR24G02FVT-3AGE2 is pin-compatible in 8-TSSOP package with 2Kbit capacity and I2C interface. It operates at 1 MHz with 1.6V–5.5V supply voltage range. Cross-manufacturer substitution is valid for applications where higher clock frequency and extended supply voltage margin are acceptable.

Q: Which substitute part has the widest operating temperature range? A: 34AA02T-E/ST supports -40°C to 125°C operating temperature, compared to -40°C to 85°C for the main part. This extended range is suitable for industrial and automotive applications requiring higher temperature operation.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All parts listed are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for electronic component manufacturing and use.

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