24LC08B/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC08B/ST is an 8Kbit electrically erasable programmable read-only memory (EEPROM) integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates via I2C interface at 400 kHz clock frequency and is housed in an 8-TSSOP surface mount package. The part is currently in active production status with verified programmability through DiGi-Electronics.

Alternative equivalent parts may be required due to inventory constraints, regional availability, or specific operating temperature range requirements for extended environmental conditions.

Substiute Parts

24LC08B/ST

Microchip TechnologyIn Stock: 88824LC08B/ST Datasheet

Current PartRFQ

24LC08B-I/ST

Microchip TechnologyIn Stock: 286224LC08B-I/ST Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 24LC08B/ST is determined by strict equivalence across the following critical parameters:

• Memory capacity: 8Kbit
• Memory organization: 256 x 8 x 4
• Interface protocol: I2C
• Clock frequency: 400 kHz
• Access time: 900 ns
• Write cycle time: 5 ms
• Supply voltage range: 2.5V to 5.5V
• Package: 8-TSSOP surface mount
• Compliance: ROHS3, MSL 1

The 24LC08B-I/ST qualifies as a direct equivalent substitute. Operating temperature range differences do not affect functional substitution capability when the application environment remains within the main part's specified 0°C to 70°C range.

Parameter Comparison

Engineering Selection Recommendations

Both the 24LC08B/ST and 24LC08B-I/ST are active production parts from Microchip Technology with identical ROHS3 compliance and MSL 1 ratings. Selection between these parts should be based on application requirements:

The 24LC08B/ST is suitable for standard industrial and commercial temperature environments within 0°C to 70°C operating range.

The 24LC08B-I/ST provides extended temperature operation from -40°C to 85°C, making it appropriate for automotive, aerospace, or harsh environment applications requiring wider thermal tolerance.

Both parts maintain full functional equivalence across all memory, interface, timing, and electrical specifications. Inventory availability and cost considerations may also influence selection.

Frequently Asked Questions (FAQ)

Q: Can 24LC08B-I/ST replace 24LC08B/ST in all applications?

A: Yes, the 24LC08B-I/ST is a direct functional equivalent. It shares identical memory capacity, I2C interface, clock frequency, access time, write cycle time, supply voltage range, and 8-TSSOP package. The extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) provides additional capability without reducing performance in standard temperature environments.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the 8-TSSOP surface mount package with 0.173" width and 4.40mm dimensions. Pinout and PCB footprint are identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both 24LC08B/ST and 24LC08B-I/ST are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected for both parts.

Q: What is the significance of the temperature range difference?

A: The operating temperature range indicates the validated thermal limits for reliable operation. The 24LC08B/ST is rated 0°C to 70°C, while the 24LC08B-I/ST extends to -40°C to 85°C. Selection depends on the actual operating environment of the application. Standard commercial/industrial applications typically use the 0°C to 70°C part; automotive and extreme environment applications require the extended range variant.

Q: Are the I2C timing and electrical characteristics identical?

A: Yes. Both parts operate at 400 kHz clock frequency with 900 ns access time and 5 ms write cycle time. Supply voltage range is 2.5V to 5.5V for both variants.