AT24C64-10PI-2.5 Equivalent & Substitute Parts

Part Overview

The AT24C64-10PI-2.5 is a 64Kbit EEPROM memory IC with I2C interface operating at 400 kHz, manufactured by Microchip Technology. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The part is packaged in 8-DIP through-hole configuration with supply voltage range of 2.5V to 5.5V and operating temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Memory Size	64Kbit
Memory Organization	8K x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Write Cycle Time	10ms

Substitute Part Grouping Explanation

Substitute parts for the AT24C64-10PI-2.5 are qualified based on the following electrical and mechanical parameters:

Memory capacity: 64Kbit with 8K x 8 organization
Interface protocol: I2C at 400 kHz clock frequency
Access time: 900 ns
Package: 8-DIP through-hole configuration
Mounting compatibility: Through-hole PCB mounting

The substitute parts maintain identical memory specifications, interface characteristics, and physical packaging. Variations in supply voltage range, operating temperature range, write cycle time, and product status are documented to enable informed selection based on application requirements.

Parameter Comparison

Parameter	AT24C64-10PI-2.5	24AA64F-I/P	24AA64-E/P	24LC64-I/P	24LC64F-I/P
Memory Size	64Kbit	64Kbit	64Kbit	64Kbit	64Kbit
Memory Organization	8K x 8	8K x 8	8K x 8	8K x 8	8K x 8
Memory Interface	I2C	I2C	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz
Access Time	900 ns	900 ns	900 ns	900 ns	900 ns
Voltage Supply Range	2.5V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Write Cycle Time	10ms	5ms	5ms	5ms	5ms
Package Type	8-DIP	8-DIP	8-DIP	8-DIP	8-DIP
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed are active products manufactured by Microchip Technology and maintain full electrical and mechanical compatibility with the AT24C64-10PI-2.5 within their specified parameter ranges.

24AA64F-I/P and 24AA64-E/P offer extended supply voltage range (1.7V minimum) compared to the original part, enabling operation in lower-voltage applications. The 24AA64-E/P additionally supports extended operating temperature range to 125°C.

24LC64-I/P and 24LC64F-I/P maintain the original supply voltage range (2.5V minimum) and operating temperature range (-40°C to 85°C), providing direct functional equivalence with improved write cycle time (5ms versus 10ms).

All substitute parts are ROHS3 compliant, addressing regulatory requirements not met by the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts be used as direct replacements for the AT24C64-10PI-2.5?

A: Yes. All listed substitute parts maintain identical memory capacity (64Kbit), organization (8K x 8), I2C interface protocol, clock frequency (400 kHz), access time (900 ns), and 8-DIP package configuration. They are electrically and mechanically compatible within their specified parameter ranges.

Q: What are the key differences between substitute options?

A: The primary differences are supply voltage range, operating temperature range, write cycle time, and product compliance status. 24AA64F-I/P and 24AA64-E/P support lower minimum supply voltage (1.7V). 24AA64-E/P extends maximum operating temperature to 125°C. All substitutes reduce write cycle time from 10ms to 5ms. All are ROHS3 compliant.

Q: Which substitute part should be selected for new designs?

A: Selection depends on application requirements. For standard 2.5V to 5.5V supply and -40°C to 85°C operation, 24LC64-I/P or 24LC64F-I/P provide direct equivalence. For extended supply voltage range, 24AA64F-I/P is suitable. For extended temperature range, 24AA64-E/P is required.

Q: Are there any package or pinout differences?

A: No. All substitute parts use identical 8-DIP through-hole packaging with 0.300" (7.62mm) body width. Pinout and PCB footprint compatibility is maintained.

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

A: Substitute parts reduce write cycle time from 10ms to 5ms, which improves data write performance. This is a functional enhancement with no negative impact on compatibility.

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