AT24C64C-PU EEPROM 64Kbit I2C Memory - Equivalent & Substitute Parts

Part Overview

The AT24C64C-PU is a 64Kbit EEPROM memory IC with I2C interface manufactured by Microchip Technology. This device operates at 1 MHz clock frequency with 550 ns access time and supports supply voltages from 1.8V to 5.5V. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain the same memory capacity, organization, and I2C interface while offering active product status and alternative performance characteristics.

Substiute Parts

AT24C64C-PU

Microchip TechnologyIn Stock: 11375AT24C64C-PU Datasheet

Current PartRFQ

24AA64F-I/P

Microchip TechnologyIn Stock: 352424AA64F-I/P Datasheet

DirectRFQ

24AA64-E/P

Microchip TechnologyIn Stock: 104624AA64-E/P Datasheet

MFR RecommendedRFQ

24AA64-I/P

Microchip TechnologyIn Stock: 2040124AA64-I/P Datasheet

MFR RecommendedRFQ

24FC64-I/P

Microchip TechnologyIn Stock: 113224FC64-I/P Datasheet

MFR RecommendedRFQ

24FC64F-I/P

Microchip TechnologyIn Stock: 154324FC64F-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT24C64C-PU is determined by the following critical parameters that must remain constant across all equivalent parts:

• Memory Size: 64Kbit (non-negotiable)
• Memory Organization: 8K x 8 (non-negotiable)
• Memory Interface: I2C (non-negotiable)
• Package / Case: 8-DIP (0.300", 7.62mm) (non-negotiable)
• Mounting Type: Through Hole (non-negotiable)
• Write Cycle Time: 5ms (non-negotiable)

Parameters that may vary within acceptable ranges for substitution:

• Clock Frequency: 400 kHz or 1 MHz (both supported by substitute parts)
• Access Time: 400 ns to 900 ns (performance variation acceptable)
• Voltage Supply Range: 1.7V to 5.5V (compatible with original 1.8V to 5.5V)
• Operating Temperature: -40°C to 85°C or -40°C to 125°C (both acceptable)

All substitute parts are manufactured by Microchip Technology and maintain ROHS3 compliance and MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are manufactured by Microchip Technology and maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility with the original AT24C64C-PU.

For applications requiring performance matching the original 1 MHz clock frequency and 550 ns access time, the 24FC64-I/P and 24FC64F-I/P parts provide the closest electrical characteristics with improved access time (400 ns) and active product status.

For applications where lower clock frequency is acceptable, the 24AA64-I/P, 24AA64-E/P, and 24AA64F-I/P parts offer active status with extended temperature range options (24AA64-E/P supports -40°C to 125°C).

All substitute parts support the same 8K x 8 memory organization and I2C interface protocol, ensuring functional compatibility at the system level.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AT24C64C-PU with any of the listed substitute parts?

A: Yes, all listed parts maintain the same 64Kbit memory capacity, 8K x 8 organization, I2C interface, 8-DIP package, and 5ms write cycle time. Electrical and thermal characteristics remain within acceptable operating ranges for most applications.

Q: What is the difference between 24AA64 and 24FC64 series parts?

A: The 24AA64 series operates at 400 kHz clock frequency with 900 ns access time. The 24FC64 series operates at 1 MHz clock frequency with 400 ns access time, matching the original AT24C64C-PU performance profile more closely.

Q: Does the voltage supply range difference affect compatibility?

A: The substitute parts support 1.7V to 5.5V, compared to the original 1.8V to 5.5V. This 0.1V difference at the lower end does not affect compatibility for standard applications operating within 1.8V to 5.5V range.

Q: Are all substitute parts RoHS compliant?

A: Yes, all substitute parts are ROHS3 compliant with MSL 1 rating, matching the original part's environmental and regulatory status.

Q: What does the suffix letter in the part number indicate?

A: Suffix letters (such as F, E, I) indicate temperature grade and packaging variations. The I suffix indicates industrial temperature range (-40°C to 85°C), while E indicates extended range (-40°C to 125°C). F indicates specific packaging or qualification variants.

Q: Can I use 24AA64-E/P for applications requiring extended temperature operation?

A: Yes, the 24AA64-E/P supports operating temperatures from -40°C to 125°C, providing extended thermal range compared to other substitutes rated to -40°C to 85°C.