AT24C01A-10PC-2.5 Equivalent & Substitute Parts

Part Overview

The AT24C01A-10PC-2.5 is a 1Kbit EEPROM memory IC utilizing I2C interface protocol with 400 kHz clock frequency, manufactured by Microchip Technology. This component is classified as obsolete, indicating discontinuation from active production. The part operates across a supply voltage range of 2.5V to 5.5V and is housed in an 8-DIP through-hole package. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for ongoing system design, maintenance, and production continuity.

Substiute Parts

AT24C01A-10PC-2.5

Microchip TechnologyIn Stock: 1127AT24C01A-10PC-2.5 Datasheet

Current PartRFQ

24LC01B-I/P

Microchip TechnologyIn Stock: 1031124LC01B-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT24C01A-10PC-2.5 is determined by strict equivalence across the following critical parameters:

Memory capacity (1Kbit), memory organization (128 x 8 bits), interface protocol (I2C), clock frequency (400 kHz), supply voltage range (2.5V ~ 5.5V), package type (8-DIP through-hole), and write cycle time (5ms) must remain identical or compatible. The 24LC01B-I/P meets all these criteria while offering improved product status (active) and enhanced compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 24LC01B-I/P is the primary substitute for the AT24C01A-10PC-2.5. This recommendation is based on:

All core electrical and mechanical parameters are identical, ensuring direct functional equivalence. The 24LC01B-I/P maintains active product status with verified availability of 10,300 units in stock, eliminating supply chain risk associated with obsolete components. The substitute achieves ROHS3 compliance, meeting modern regulatory requirements, whereas the original part is non-compliant. Operating temperature range expansion (-40°C to 85°C versus 0°C to 70°C) provides enhanced environmental flexibility. Access time specification (4.6 µs versus 900 ns) represents a slower response characteristic; however, this remains compatible with I2C 400 kHz protocol specifications and does not impact functional performance in standard applications.

Frequently Asked Questions (FAQ)

Q: Can the 24LC01B-I/P directly replace the AT24C01A-10PC-2.5 in existing circuit designs?

A: Yes. Both components share identical memory capacity (1Kbit), organization (128 x 8), I2C interface, clock frequency (400 kHz), supply voltage range (2.5V ~ 5.5V), and 8-DIP package dimensions. Pin-to-pin compatibility is confirmed, enabling direct board-level substitution without circuit modification.

Q: What is the significance of the access time difference between these parts?

A: The AT24C01A-10PC-2.5 specifies 900 ns access time, while the 24LC01B-I/P specifies 4.6 µs. Both values are compatible with I2C 400 kHz operation. The slower access time of the substitute does not degrade system performance in standard I2C applications where bus timing is the limiting factor.

Q: Why is the 24LC01B-I/P preferred despite the slower access time?

A: The 24LC01B-I/P offers active product status with confirmed inventory availability, ROHS3 compliance certification, and extended operating temperature range. These factors ensure long-term supply security and regulatory alignment, outweighing the minor access time specification difference.

Q: Are there packaging or mounting differences between these components?

A: No. Both components utilize identical 8-DIP (0.300", 7.62mm) through-hole packaging. Mechanical fit and PCB mounting procedures are identical.

Q: What compliance certifications apply to the substitute part?

A: The 24LC01B-I/P is ROHS3 compliant and REACH unaffected. The original AT24C01A-10PC-2.5 is RoHS non-compliant. For applications requiring regulatory compliance, the substitute meets current environmental standards.