AT24C02A-10PC EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT24C02A-10PC is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology, packaged in 8-DIP through-hole configuration. This part operates at 400 kHz I2C clock frequency with 900 ns access time and supports supply voltages from 4.5V to 5.5V across an operating temperature range of 0°C to 70°C. The AT24C02A-10PC is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the AT24C02A-10PC is determined by the following critical parameters: memory size (2Kbit), memory organization (256 x 8), I2C interface protocol, package type (8-DIP through-hole), and functional compatibility within specified electrical operating conditions.

Substitute parts are grouped into two categories based on operational characteristics:

Category 1: Direct Functional Equivalents (400 kHz I2C Operation) Parts meeting the primary operational specification of 400 kHz I2C clock frequency with 900 ns access time and compatible voltage/temperature ranges.

Category 2: Extended Operating Range Variants (100 kHz I2C Operation) Parts with reduced I2C clock frequency (100 kHz) but maintaining core 2Kbit memory architecture and 8-DIP packaging. These parts operate across extended temperature ranges and may have different electrical characteristics.

All substitute candidates maintain identical package geometry, pinout compatibility, and memory capacity, enabling direct board-level replacement within the specified parameter constraints.

Parameter Comparison

Part Number	Manufacturer	Memory Size	I2C Frequency	Access Time	Voltage Supply	Operating Temp	Write Cycle	Product Status	RoHS Status
AT24C02A-10PC	Microchip	2Kbit	400 kHz	900 ns	4.5V ~ 5.5V	0°C ~ 70°C	5ms	Obsolete	Non-compliant
24AA02/P	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	0°C ~ 70°C	5ms	Active	ROHS3 Compliant
24AA02-I/P	Microchip	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	5ms	Active	ROHS3 Compliant
24C02C/P	Microchip	2Kbit	400 kHz	4.6 µs	4.5V ~ 5.5V	0°C ~ 70°C	1.5ms	Active	ROHS3 Compliant
24C02C-I/P	Microchip	2Kbit	400 kHz	900 ns	4.5V ~ 5.5V	-40°C ~ 85°C	1ms	Active	ROHS3 Compliant
24C02C-E/P	Microchip	2Kbit	100 kHz	4.6 µs	4.5V ~ 5.5V	-40°C ~ 125°C	1.5ms	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: 24AA02-I/P This part is designated as the manufacturer-recommended substitute. It maintains active product status with ROHS3 compliance certification. The 24AA02-I/P offers extended voltage supply range (1.7V ~ 5.5V) and extended operating temperature range (-40°C ~ 85°C) compared to the obsolete AT24C02A-10PC, providing superior design flexibility for new applications. DiGi-Electronics programmability is verified for this part number.

Secondary Recommendation: 24C02C-I/P This active part maintains identical I2C frequency (400 kHz) and access time (900 ns) specifications as the original AT24C02A-10PC. It provides extended operating temperature range (-40°C ~ 85°C) and improved write cycle time (1ms versus 5ms). ROHS3 compliance is certified.

Alternative for Extended Temperature Applications: 24C02C-E/P For applications requiring extended operating temperature range (-40°C ~ 125°C), the 24C02C-E/P provides this capability. Note that I2C frequency is reduced to 100 kHz and access time increases to 4.6 µs. This part is suitable only for applications where reduced I2C speed is acceptable.

Compatibility Note: 24AA02/P This part provides active status and ROHS3 compliance with extended voltage range (1.7V ~ 5.5V). Operating temperature range matches the original part (0°C ~ 70°C). DiGi-Electronics programmability is verified.

All recommended substitutes maintain 8-DIP through-hole packaging and 256 x 8 memory organization, ensuring direct board-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can 24AA02-I/P directly replace AT24C02A-10PC on existing PCBs? A: Yes. Both parts use identical 8-DIP through-hole packaging with matching pinout and memory organization (256 x 8). The 24AA02-I/P is electrically compatible within the AT24C02A-10PC operating envelope and provides extended voltage and temperature ranges.

Q: What is the difference between 24C02C-I/P and 24C02C-E/P? A: The primary differences are I2C clock frequency (24C02C-I/P operates at 400 kHz; 24C02C-E/P at 100 kHz) and operating temperature range (24C02C-I/P: -40°C ~ 85°C; 24C02C-E/P: -40°C ~ 125°C). Select 24C02C-E/P only if extended temperature operation is required and reduced I2C speed is acceptable.

Q: Why does 24AA02/P have a lower minimum voltage (1.7V) than AT24C02A-10PC (4.5V)? A: The 24AA02/P is designed with extended voltage range capability, allowing operation at lower supply voltages. This does not affect compatibility with 4.5V ~ 5.5V applications; the part operates normally within this range.

Q: Are all substitute parts RoHS compliant? A: All active substitute parts listed (24AA02/P, 24AA02-I/P, 24C02C/P, 24C02C-I/P, 24C02C-E/P) are ROHS3 compliant. The original AT24C02A-10PC is RoHS non-compliant due to its obsolete status.

Q: What does "DiGi-Electronics Programmable: Verified" mean? A: This certification indicates that the part has been verified for programming compatibility with DiGi-Electronics equipment and processes, ensuring reliable device programming during manufacturing.

Q: Can I use 24C02C-E/P in a design originally specified for AT24C02A-10PC? A: Yes, with the constraint that your application must tolerate 100 kHz I2C operation instead of 400 kHz. If your system requires 400 kHz I2C speed, use 24C02C-I/P or 24AA02-I/P instead.

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