AT24C64-10PI EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT24C64-10PI is a 64Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for I2C serial communication applications operating at 400 kHz. This device features 8K x 8 memory organization in an 8-DIP through-hole package with a 900 ns access time and 10ms write cycle time.

The AT24C64-10PI is classified as obsolete. Locating equivalent or substitute components is necessary to support legacy system maintenance, board redesigns, or when original inventory becomes unavailable. Active alternatives with compatible electrical and mechanical specifications are available from the same manufacturer.

Substiute Parts

AT24C64-10PI

Microchip TechnologyIn Stock: 1094AT24C64-10PI 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

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT24C64-10PI is determined by the following critical parameters:

• Memory Capacity & Organization: Must be 64Kbit with 8K x 8 organization to maintain firmware and data compatibility
• Interface Protocol: Must support I2C serial communication at 400 kHz minimum
• Access Time: Must meet or exceed 900 ns specification
• Package & Mounting: Must use 8-DIP through-hole package with identical 0.300" (7.62mm) pitch for PCB compatibility
• Voltage Supply: Substitute parts operating at lower minimum voltages (1.7V) are compatible with 4.5V ~ 5.5V systems
• Temperature Range: Substitute parts with extended temperature ranges (-40°C ~ 125°C) are compatible with the original -40°C ~ 85°C specification

The identified substitute parts 24AA64F-I/P and 24AA64-E/P meet all critical electrical and mechanical parameters required for direct replacement.

Parameter Comparison

Engineering Selection Recommendations

Both 24AA64F-I/P and 24AA64-E/P are active production parts from Microchip Technology with ROHS3 compliance, addressing the obsolescence status of the AT24C64-10PI.

The 24AA64F-I/P operates within the original temperature range (-40°C ~ 85°C) and provides functional equivalence with improved write cycle performance (5ms versus 10ms). This part is suitable for applications with standard temperature requirements.

The 24AA64-E/P extends the operating temperature range to -40°C ~ 125°C, providing additional thermal margin for applications subject to elevated ambient conditions or thermal cycling. This part is recommended for systems requiring extended temperature operation within the specified range.

Both substitute parts support the full voltage supply range of the original component and maintain identical I2C interface specifications, memory capacity, and package geometry.

Frequently Asked Questions (FAQ)

Q: Can 24AA64F-I/P and 24AA64-E/P be used interchangeably with AT24C64-10PI?

A: Both parts are direct functional replacements. They share identical memory capacity (64Kbit), organization (8K x 8), I2C interface, clock frequency (400 kHz), access time (900 ns), and 8-DIP package geometry. The primary differences are product status (active versus obsolete), RoHS compliance, and operating temperature range.

Q: What is the impact of the faster write cycle time in the substitute parts?

A: The substitute parts feature a 5ms write cycle time compared to the original 10ms specification. This represents improved performance and does not create compatibility issues. Systems designed for the original 10ms timing will operate correctly with the faster write cycle.

Q: Are there voltage supply compatibility concerns?

A: No. The substitute parts operate across 1.7V ~ 5.5V, which encompasses the original 4.5V ~ 5.5V range. Systems powered at 4.5V ~ 5.5V will operate within the specified range of both substitute parts.

Q: Which substitute part should be selected for high-temperature applications?

A: The 24AA64-E/P is specified for -40°C ~ 125°C operation. Select this part for applications requiring operation above 85°C. The 24AA64F-I/P maintains the original -40°C ~ 85°C range and is suitable for standard temperature environments.

Q: Are there packaging or mounting differences?

A: No. All three parts use identical 8-DIP through-hole packages with 0.300" (7.62mm) pitch. PCB layout and mounting procedures remain unchanged.

Q: What is the significance of RoHS3 compliance in the substitute parts?

A: The substitute parts meet ROHS3 (Restriction of Hazardous Substances) compliance requirements, whereas the original AT24C64-10PI is non-compliant. This is relevant for applications subject to environmental or regulatory restrictions on hazardous materials.