AT24C02A-10PC-1.8 Equivalent & Substitute Parts

Part Overview

The AT24C02A-10PC-1.8 is a 2Kbit EEPROM memory IC with I2C interface operating at 400 kHz, manufactured by Microchip Technology. This component features 256 x 8 memory organization, 900 ns access time, and operates across a 1.8V to 5.5V supply voltage range in an 8-DIP through-hole package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and production continuity.

Substiute Parts

AT24C02A-10PC-1.8

Microchip TechnologyIn Stock: 1050AT24C02A-10PC-1.8 Datasheet

Current PartRFQ

24AA02/P

Microchip TechnologyIn Stock: 91124AA02/P Datasheet

DirectRFQ

24AA02-I/P

Microchip TechnologyIn Stock: 128824AA02-I/P Datasheet

MFR RecommendedRFQ

34LC02-E/P

Microchip TechnologyIn Stock: 103634LC02-E/P Datasheet

MFR RecommendedRFQ

34LC02-I/P

Microchip TechnologyIn Stock: 117034LC02-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT24C02A-10PC-1.8 is determined by the following critical parameters:

Core Compatibility Requirements:

• Memory capacity: 2Kbit
• Memory organization: 256 x 8
• Interface protocol: I2C
• Package type: 8-DIP through-hole
• Write cycle time: 5ms

Acceptable Variation Parameters:

• Clock frequency: 400 kHz or higher
• Access time: 900 ns or faster
• Voltage supply range: Must encompass or exceed 1.8V minimum
• Operating temperature: Extended ranges acceptable

Substitute parts are grouped into two categories based on clock frequency specifications: 400 kHz operation (direct functional equivalents) and 1 MHz operation (enhanced performance alternatives with faster access times).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

The 24AA02/P and 24AA02-I/P are functionally equivalent to the AT24C02A-10PC-1.8, maintaining identical 400 kHz clock frequency and 900 ns access time specifications. Both parts are active products with ROHS3 compliance. The 24AA02-I/P offers extended operating temperature range (-40°C to 85°C) compared to the original part's 0°C to 70°C specification, providing greater design flexibility for industrial applications. Both parts feature verified programmability status and are available in production quantities.

Enhanced Performance Alternatives:

The 34LC02-E/P and 34LC02-I/P operate at 1 MHz clock frequency with 400 ns access time, delivering 2.5x faster memory access than the original specification. These parts maintain 2Kbit capacity and 8-DIP packaging. The 34LC02-E/P supports extended temperature operation to 125°C, while the 34LC02-I/P operates to 85°C. Both are ROHS3 compliant and active products. The minimum supply voltage for these parts is 2.2V, which is higher than the original 1.8V specification and must be evaluated against system requirements.

All substitute parts maintain identical memory organization (256 x 8), I2C interface protocol, 5ms write cycle time, and 8-DIP through-hole package compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can 24AA02/P directly replace AT24C02A-10PC-1.8 in existing designs?

A: Yes. Both parts share identical memory capacity (2Kbit), interface (I2C), clock frequency (400 kHz), access time (900 ns), and package type (8-DIP). The 24AA02/P operates at 1.7V minimum supply voltage compared to 1.8V for the original part, and maintains the same 0°C to 70°C temperature range. Pin-for-pin compatibility is maintained.

Q: What is the difference between 24AA02-I/P and 24AA02/P?

A: Both parts are functionally identical in memory specifications and clock frequency. The primary difference is operating temperature range: 24AA02-I/P operates from -40°C to 85°C, while 24AA02/P operates from 0°C to 70°C. The extended temperature range of the -I/P variant provides design margin for industrial and automotive applications.

Q: When should 34LC02 parts be selected over 24AA02 parts?

A: The 34LC02-E/P and 34LC02-I/P should be selected when faster memory access is required. These parts operate at 1 MHz (versus 400 kHz) with 400 ns access time (versus 900 ns). However, the minimum supply voltage is 2.2V, which must be compatible with the system power budget. These parts are suitable for performance-critical applications where the higher clock frequency provides measurable system benefits.

Q: Are all substitute parts RoHS compliant?

A: The original AT24C02A-10PC-1.8 is RoHS non-compliant. All substitute parts (24AA02/P, 24AA02-I/P, 34LC02-E/P, 34LC02-I/P) are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.

Q: What is the inventory status of substitute parts?

A: 24AA02/P: 854 units in stock; 24AA02-I/P: 1260 units in stock; 34LC02-E/P: 990 units in stock; 34LC02-I/P: 1083 units in stock. All substitute parts are available as new original stock.

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

A: Yes. All parts use 8-DIP (0.300", 7.62mm) through-hole packaging with identical pin assignments and PCB footprint compatibility. No layout modifications are required for substitution.