AT24C64-10PC EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT24C64-10PC is a 64Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, featuring I2C serial interface operation at 400 kHz. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new design implementations. The part is packaged in 8-DIP through-hole configuration and operates within the 4.5V to 5.5V supply voltage range with access time of 900 nanoseconds.

Substiute Parts

AT24C64-10PC

Microchip TechnologyIn Stock: 2269AT24C64-10PC Datasheet

Current PartRFQ

24AA64/P

Microchip TechnologyIn Stock: 167024AA64/P Datasheet

DirectRFQ

24AA64-E/P

Microchip TechnologyIn Stock: 104624AA64-E/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT24C64-10PC are qualified based on the following critical parameters that determine functional compatibility:

• Memory capacity: 64Kbit with 8K x 8 organization
• Serial interface protocol: I2C at 400 kHz maximum frequency
• Physical package: 8-DIP through-hole form factor with 0.300" (7.62mm) pitch
• Access time: 900 ns maximum
• Pin-compatible footprint and signal mapping

The identified substitutes maintain these core electrical and mechanical specifications. Variations in supply voltage range, operating temperature range, write cycle time, and product status are noted but do not prevent functional substitution when system requirements align with the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain full electrical and mechanical compatibility with the AT24C64-10PC at the functional level. Selection between alternatives is determined by system requirements and compliance mandates:

24AA64/P provides direct substitution with identical operating temperature range (0°C ~ 70°C) and maintains active product status with verified programmability. This part offers improved write cycle time (5 ms versus 10 ms) and extended supply voltage range (1.7V ~ 5.5V). ROHS3 compliance is achieved.

24AA64-E/P is the manufacturer-recommended alternative, offering the same core memory specifications with extended operating temperature range (-40°C ~ 125°C) suitable for industrial and automotive applications. This part also achieves ROHS3 compliance and provides the same write cycle time improvement (5 ms).

Selection should prioritize active product status and compliance requirements. The extended temperature range of 24AA64-E/P is advantageous for applications requiring operation beyond standard commercial temperature limits.

Frequently Asked Questions (FAQ)

Q: Can 24AA64/P and 24AA64-E/P be used interchangeably with AT24C64-10PC?

A: Both parts are pin-compatible and functionally equivalent for I2C EEPROM 64Kbit memory applications. Substitution is valid when system operating temperature requirements fall within the substitute part's specified range. The 24AA64/P operates 0°C ~ 70°C, while 24AA64-E/P operates -40°C ~ 125°C.

Q: What is the significance of the write cycle time difference (10 ms versus 5 ms)?

A: The substitute parts complete page write operations in half the time of the original part. This represents improved performance and does not create compatibility issues. Systems designed for the 10 ms cycle will function correctly with the faster 5 ms cycle time.

Q: Are there supply voltage compatibility concerns?

A: The AT24C64-10PC operates 4.5V ~ 5.5V. Both substitutes operate 1.7V ~ 5.5V, providing extended low-voltage capability. Systems operating within the original 4.5V ~ 5.5V range are fully compatible with either substitute.

Q: What does ROHS3 compliance mean for this component?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. The original AT24C64-10PC is non-compliant. Substitutes with ROHS3 compliance are required for applications subject to environmental regulations.

Q: Is the 8-DIP package identical across all three parts?

A: Yes. All three parts use 8-DIP (0.300", 7.62mm) through-hole packaging with identical pin configuration and footprint, enabling direct board-level substitution without layout modifications.

Q: Which substitute should be selected for new designs?

A: For new designs, either active substitute is appropriate. The 24AA64-E/P is the manufacturer-recommended part and offers extended temperature range for broader application compatibility. The 24AA64/P is suitable when operating temperature remains within 0°C ~ 70°C.