AT24C01A-10PC-2.7 Equivalent & Substitute Parts

Part Overview

The AT24C01A-10PC-2.7 is a 1Kbit EEPROM memory IC with I2C interface operating at 400 kHz, manufactured by Microchip Technology in 8-DIP through-hole packaging. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The AT24C01A series has been superseded by the 24LC01B family, which maintains functional compatibility while offering improved specifications and active product status.

Substiute Parts

AT24C01A-10PC-2.7

Microchip TechnologyIn Stock: 12346AT24C01A-10PC-2.7 Datasheet

Current PartRFQ

24LC01B-I/P

Microchip TechnologyIn Stock: 1031124LC01B-I/P Datasheet

MFR RecommendedRFQ

24LC01B/P

Microchip TechnologyIn Stock: 400224LC01B/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT24C01A-10PC-2.7 is based on strict equivalence across the following critical parameters:

• Memory capacity: 1Kbit (128 x 8 organization)
• Interface protocol: I2C at 400 kHz
• Package format: 8-DIP through-hole
• Write cycle time: 5ms
• Physical dimensions: 0.300" (7.62mm) DIP spacing

The 24LC01B-I/P and 24LC01B/P are direct functional equivalents manufactured by Microchip Technology. Both parts maintain identical memory specifications, I2C protocol support, and physical packaging. The primary differences are in access time performance (4.6 µs vs. 900 ns), supply voltage range expansion (2.5V ~ 5.5V vs. 2.7V ~ 5.5V), and product status transition from obsolete to active.

Parameter Comparison

Engineering Selection Recommendations

Both 24LC01B variants are suitable replacements for the obsolete AT24C01A-10PC-2.7 based on functional equivalence and active product status. The 24LC01B-I/P and 24LC01B/P are ROHS3 compliant, addressing regulatory requirements that the original part does not meet.

Selection between the two 24LC01B options depends on operating temperature requirements. The 24LC01B-I/P supports extended temperature range (-40°C ~ 85°C), while the 24LC01B/P maintains the original temperature specification (0°C ~ 70°C). Both parts are available in tube packaging and carry verified programmability status.

The expanded supply voltage range (2.5V minimum vs. 2.7V minimum) in both substitutes provides additional design flexibility for low-voltage applications.

Frequently Asked Questions (FAQ)

Q: Are the 24LC01B variants pin-compatible with the AT24C01A-10PC-2.7?

A: Yes. Both substitute parts use identical 8-DIP through-hole packaging with 0.300" (7.62mm) spacing, ensuring direct PCB compatibility without layout modifications.

Q: What is the functional difference between 24LC01B-I/P and 24LC01B/P?

A: The primary difference is operating temperature range. The 24LC01B-I/P operates from -40°C to 85°C, while the 24LC01B/P operates from 0°C to 70°C. Both maintain identical memory specifications and I2C protocol support.

Q: Can I use these substitutes in existing designs without firmware changes?

A: Yes. The I2C interface, memory organization (128 x 8), and protocol implementation are identical. The 5ms write cycle time and 400 kHz clock frequency are preserved across all three parts.

Q: Why is the access time different between the original and substitute parts?

A: The AT24C01A-10PC-2.7 specifies 900 ns access time, while the 24LC01B variants specify 4.6 µs. Both values are within acceptable I2C protocol timing margins and do not affect system-level compatibility.

Q: Are there compliance advantages to using the 24LC01B substitutes?

A: Yes. Both 24LC01B variants are ROHS3 compliant, whereas the AT24C01A-10PC-2.7 is non-compliant. This is significant for applications subject to RoHS regulations.

Q: What is the inventory status for these substitute parts?

A: The 24LC01B-I/P has 10,300 units in stock, and the 24LC01B/P has 3,918 units in stock, both available as new original components in tube packaging.