24C08B-E/P EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24C08B-E/P is an 8Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, featuring I2C serial interface communication at 100 kHz clock frequency. This device is designed for non-volatile data storage applications requiring through-hole mounting in 8-DIP packaging. The part is currently classified as obsolete, necessitating identification of functionally compatible alternatives for ongoing system support and new design implementations.

Substiute Parts

24C08B-E/P

Microchip TechnologyIn Stock: 130724C08B-E/P Datasheet

Current PartRFQ

24LC08B-E/P

Microchip TechnologyIn Stock: 170524LC08B-E/P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the 24C08B-E/P is determined by the following critical parameters:

Memory Capacity & Organization: The substitute part must maintain 8Kbit capacity with 256 x 8 x 4 organization to ensure data storage equivalence and address mapping compatibility.

I2C Interface Compliance: Both parts utilize I2C serial communication protocol, enabling direct interface compatibility with existing host controllers and bus architecture.

Package & Pinout: The 8-DIP through-hole package format must be identical to maintain mechanical and electrical compatibility with existing PCB layouts and socket configurations.

Voltage Supply Range: The substitute part must operate within or encompass the original supply voltage specification to ensure reliable operation across the intended power distribution network.

Operating Temperature Range: The substitute must support the full -40°C to 125°C temperature range to maintain functional integrity across all environmental conditions.

The 24LC08B-E/P meets all substitution criteria while offering enhanced performance characteristics and improved product status.

Parameter Comparison

Engineering Selection Recommendations

The 24LC08B-E/P is the direct equivalent substitute for the obsolete 24C08B-E/P. Both devices are manufactured by Microchip Technology and share identical memory capacity, organization, interface protocol, and physical packaging specifications.

The 24LC08B-E/P offers the following advantages for component selection:

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Compliance Certification: The 24LC08B-E/P achieves ROHS3 compliance, meeting current environmental and regulatory requirements. The main part is RoHS non-compliant.

Voltage Supply Flexibility: The substitute part operates across an extended voltage range (2.5V ~ 5.5V) compared to the main part (4.5V ~ 5.5V), providing greater design flexibility for low-power applications.

Performance Enhancement: The 24LC08B-E/P provides faster clock frequency (400 kHz versus 100 kHz) and improved access time (900 ns versus 4.6 µs), enabling higher-speed I2C bus operation when system architecture permits.

Frequently Asked Questions (FAQ)

Q: Can the 24LC08B-E/P directly replace the 24C08B-E/P in existing designs?

A: Yes. Both parts share identical memory capacity (8Kbit), organization (256 x 8 x 4), I2C interface protocol, and 8-DIP through-hole package configuration. Direct socket substitution is mechanically and electrically compatible.

Q: What are the key differences between these parts?

A: The primary differences are clock frequency (100 kHz versus 400 kHz), access time (4.6 µs versus 900 ns), voltage supply range (4.5-5.5V versus 2.5-5.5V), product status (obsolete versus active), and RoHS compliance (non-compliant versus ROHS3 compliant).

Q: Does the faster clock frequency of the 24LC08B-E/P affect compatibility?

A: No. The I2C protocol is backward compatible. The 24LC08B-E/P operates at higher speeds but functions correctly on I2C buses configured for lower frequencies. The host controller determines actual bus speed.

Q: Is the extended voltage range of the 24LC08B-E/P a concern?

A: No. The substitute part operates across 2.5V to 5.5V, which encompasses the original specification of 4.5V to 5.5V. Systems designed for the original part will operate within the substitute's supported voltage range.

Q: What is the impact of the write cycle time difference?

A: The 24LC08B-E/P has a longer write cycle time (5 ms versus 1 ms). For applications requiring rapid sequential writes, this difference may affect throughput. However, for typical EEPROM applications with infrequent write operations, this difference is not operationally significant.

Q: Are there any packaging or pinout differences?

A: No. Both parts use identical 8-DIP through-hole packaging with 0.300" (7.62mm) spacing. Pinout and mechanical dimensions are identical, enabling direct PCB compatibility.