24LC08BT/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC08BT/ST is an 8Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for non-volatile data storage applications requiring I2C serial communication. This device operates across a supply voltage range of 2.5V to 5.5V and supports I2C clock frequencies up to 400 kHz with a 900 ns access time. The component is actively produced and RoHS3 compliant, making it suitable for modern industrial and consumer electronics applications where equivalent or substitute parts may be required due to inventory availability, packaging preferences, or extended temperature range requirements.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Organization	256 x 8 x 4
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
Voltage Supply Range	2.5V ~ 5.5V
Package Type	8-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24LC08BT/ST is determined by strict equivalence across the following critical parameters:

Memory capacity and organization (8Kbit, 256 x 8 x 4 configuration)
Serial communication protocol (I2C interface)
Electrical performance specifications (400 kHz clock frequency, 900 ns access time, 5 ms write cycle time)
Supply voltage compatibility (2.5V ~ 5.5V range)
Physical package format (8-TSSOP surface mount)
Regulatory compliance (RoHS3, REACH Unaffected, EAR99 classification)

The primary substitute part 24LC08BT-I/ST maintains full electrical and functional equivalence to the main part number while offering an extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) and alternative packaging options (Cut Tape and Digi-Reel versus Tape & Reel).

Parameter Comparison

Parameter	24LC08BT/ST (Main)	24LC08BT-I/ST (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Memory Size	8Kbit	8Kbit
Memory Organization	256 x 8 x 4	256 x 8 x 4
Memory Interface	I2C	I2C
Clock Frequency	400 kHz	400 kHz
Access Time	900 ns	900 ns
Write Cycle Time	5 ms	5 ms
Voltage Supply Range	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C
Package Type	8-TSSOP	8-TSSOP
Mounting Type	Surface Mount	Surface Mount
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both the 24LC08BT/ST and 24LC08BT-I/ST are active production components from Microchip Technology with identical RoHS3 and REACH compliance certifications. Selection between these parts should be based on the following criteria:

The 24LC08BT/ST is appropriate for applications with operating temperature requirements limited to 0°C to 70°C and where Tape & Reel packaging is specified for automated assembly processes.

The 24LC08BT-I/ST is suitable for applications requiring extended temperature operation from -40°C to 85°C and where Cut Tape or Digi-Reel packaging formats are preferred or required. This substitute offers broader environmental operating conditions while maintaining full electrical equivalence.

Both parts carry identical regulatory classifications (EAR99, HTSUS 8542.32.0051) and moisture sensitivity levels (MSL 1 - Unlimited), ensuring compliance compatibility in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the 24LC08BT-I/ST be used as a direct replacement for the 24LC08BT/ST in all applications?

A: The 24LC08BT-I/ST is electrically and functionally equivalent to the 24LC08BT/ST across all specified parameters. The primary difference is the extended operating temperature range (-40°C to 85°C versus 0°C to 70°C). Direct substitution is valid for applications operating within the 0°C to 70°C range. For applications requiring operation below 0°C or above 70°C, the 24LC08BT-I/ST provides the necessary temperature coverage.

Q: What is the significance of the packaging format difference between Tape & Reel and Cut Tape/Digi-Reel?

A: Tape & Reel (TR) packaging is optimized for high-volume automated pick-and-place assembly operations. Cut Tape (CT) and Digi-Reel packaging provide flexibility for lower-volume production, prototyping, or manual assembly processes. The electrical and functional performance of the component is identical regardless of packaging format.

Q: Are there any pin configuration or footprint differences between these parts?

A: Both parts use the 8-TSSOP package with identical pin configurations and PCB footprints. No layout or design modifications are required when substituting between these part numbers.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the 24LC08BT/ST and 24LC08BT-I/ST are RoHS3 compliant, REACH Unaffected, and classified under EAR99 export control. They carry identical HTSUS commodity codes and moisture sensitivity levels, ensuring equivalent compliance status in regulated applications.

Q: What factors should determine which substitute part to select?

A: Selection should be based on three primary factors: operating temperature requirements, packaging format preference for your assembly process, and component availability. If your application operates within 0°C to 70°C and Tape & Reel packaging is acceptable, either part is suitable. If extended temperature operation or alternative packaging is required, the 24LC08BT-I/ST is the appropriate choice.

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