on November 12th 65

Comprehensive Guide to AT24C02 Serial EEPROM

In today’s ever-evolving world of electronics, reliable data storage is basic, especially for applications where data retention and durability are dominant. The Microchip AT24C02 stands out as a versatile, cost-effective EEPROM solution, offering 2 kb of non-volatile memory with remarkable endurance, supporting over a million write/erase cycles and up to 100 years of data retention. Its compatibility with I²C interfaces makes it a staple in diverse industries, from automotive to consumer electronics, enabling seamless integration and efficient operation within existing systems. This article explores the AT24C02’s structure, features, applications, and practical insights into maximizing its potential for dependable, long-lasting performance across a range of technological environments.

Catalog

Pin Configuration

Pin Number	Pin Name	Description
1	A0	Address Input A0
2	A1	Address Input A1
3	A2	Address Input A2
4	GND	Ground
5	SDA	Serial DATA (I2C)
6	SCL	Serial CLOCK Input (I2C)
7	WP	Write Protect
8	VCC	Power Supply

AT24C02 Design Layout

Footprint

3D Model

Overview of AT24C02

The AT24C02 distinguishes itself as a 2-kilobit EEPROM, crucial in a variety of technological setups due to its steadfast data retention capabilities over prolonged durations. Its design prioritizes power efficiency, catering to the demands of contemporary commercial electronics by consuming just 0.4 mA during active data transactions and a mere 6 µA in standby mode. Such efficiency not only prolongs battery longevity but also seamlessly aligns with the minimalist energy approaches gaining traction in modern design philosophies. The memory is organized into 256 segments of 8-bit words, presenting an ideal arrangement for low-voltage frameworks, which are favored for their environmental and economic advantages.

The AT24C02 meets the demand for flexible electronic components through its availability in diverse package options, including the compact 8-pin PDIP, 8-lead TSSOP, and JEDEC SOIC. These choices enhance design adaptability, permitting integration across a broad spectrum of devices. Acknowledging historical engineering trends, there is a continuous inclination towards components that simultaneously offer size efficiency and robust functionality, with the AT24C02 adeptly fulfilling these demands.

Under the AT24C series umbrella, variants such as 1A, 02, 04, 08A, and 16A cater to customized memory configurations, facilitating scalability in project development. Supporting up to eight devices on a single I²C bus, this series is poised to meet increasing interface and interconnectivity demands. Within industrial contexts, the push to maximize connectivity while upholding communication reliability places a spotlight on the usefulness of such adaptable components. In pragmatic terms, ensuring efficient operation among multiple devices on a shared bus can significantly uplift process effectiveness.

Features

Feature	Description
Voltage Operation	Low-voltage and standard-voltage operation
	- 5.0V (VCC = 4.5V to 5.5V)
Memory Organization	Internally organized as 256 x 8 (2K)
Interface	2-wire serial interface
Noise Suppression	Schmitt trigger, filtered inputs
Data Transfer Protocol	Bi-directional data transfer protocol
Compatibility	- 100 kHz (1.8V, 2.5V, 2.7V)
	- 400 kHz (5V)
Write Protection	Write protect pin for hardware data protection
Write Modes	8-byte page (2K) write modes
Partial Page Writes	Allowed
Write Cycle	Self-timed write cycle (10 ms max)
Reliability	- Endurance: 1 million write cycles
	- Data retention: 100 years
Automotive and Extended Temperature	Automotive grade and extended temperature devices available
Package Options	8-lead JEDEC SOIC, 8-pin PDIP, and 8-lead TSSOP packages

Technical Specifications

This table captures the technical specifications and attributes for the Microchip Technology AT24C02-10PC, providing a concise reference.

Type	Parameter
Mounting Type	Through Hole
Package / Case	8-DIP (0.300, 7.62mm)
Supplier Device Package	8-PDIP
Memory Types	Non-Volatile
Operating Temperature	0°C ~ 70°C TA
Packaging	Tube
Published	2001
Part Status	Obsolete
Moisture Sensitivity Level (MSL)	Not Applicable
Voltage - Supply	4.5V ~ 5.5V
Base Part Number	AT24C02
Memory Size	2Kb (256 x 8)
Clock Frequency	400kHz
Access Time	900ns
Memory Format	EEPROM
Memory Interface	I2C
Write Cycle Time - Word, Page	5ms
RoHS Status	Non-RoHS Compliant

Functional Diagram

Alternative

• DS2431+ One-Wire Based EEPROM

• 24LCxxx Series EEPROM

• AT28C64B 64 Kbit EEPROM

Equivalents

Model Number	Manufacturer	Description
M24C02-BN3/G	STMicroelectronics	256X8 I2C/2-WIRE SERIAL EEPROM, PDIP8, PLASTIC, DIP-8
AT24C02A-10PI	Atmel Corporation	EEPROM, 256X8, Serial, CMOS, PDIP8, 0.300 INCH, PLASTIC, DIP-8
M24C02-BN3TP/G	STMicroelectronics	256X8 I2C/2-WIRE SERIAL EEPROM, PDIP8, LEAD FREE, PLASTIC, DIP-8
M24C02-BN3T	STMicroelectronics	256X8 I2C/2-WIRE SERIAL EEPROM, PDIP8, PLASTIC, DIP-8
M24C02-BN3TP	STMicroelectronics	256X8 I2C/2-WIRE SERIAL EEPROM, PDIP8, LEAD FREE, PLASTIC, DIP-8
AT24C02-10PA-5.0C	Atmel Corporation	EEPROM, 256X8, Serial, CMOS, PDIP8, 0.300 INCH, PLASTIC, MS-001BA, DIP-8
IS24C02F-P	Integrated Silicon Solution Inc	EEPROM, 256X8, Serial, CMOS, PDIP8, 0.300 INCH, PLASTIC, DIP-8
IS24C02-P	Integrated Silicon Solution Inc	EEPROM, 256X8, Serial, CMOS, PDIP8, 0.300 INCH, PLASTIC, DIP-8
M24C02-BN3TG/G	STMicroelectronics	256X8 I2C/2-WIRE SERIAL EEPROM, PDIP8, LEAD FREE, PLASTIC, DIP-8
CAT24C02PI	Catalyst Semiconductor	EEPROM, 256X8, Serial, CMOS, PDIP8, 0.300 INCH, PLASTIC, DIP-8

Operational Mechanics of AT24C02 EEPROM

Initiating and Concluding Transactions

The AT24C02 EEPROM relies on start and stop signals to manage data transactions. These signals act as catalysts for framing read and write operations. During the process, transactions begin when both the clock and data lines shift from high to low, a coordinated dance that facilitates efficient data management within the memory chip. Concluding a transaction, a high-line stop condition signifies successful completion, paralleling certain communication protocols that highlight the importance of clear start and end cues to avoid data loss and enhance reliability.

Address Handling and Data Processing

The AT24C02 processes not only data but also device and byte addresses with care, ensuring precision in accessing the correct data. Handling addresses properly is similar to following a precise directory path to locate files on a computer. This addressing system reflects strong data management practices, ensuring smooth and accurate data retrieval and storage, similar to approaches in comprehensive database systems.

Ensuring Data Integrity

Data integrity in the AT24C02 is safeguarded through detailed transaction handling and signal processing. The transition requirements for starting and ending operations provide a reliable framework to minimize errors. In addition, precise address handling guarantees accurate data access, reminiscent of a GPS guiding accurately. In the world of technology, such systems are ultimate in maintaining accuracy and reliability, serving as a core component that upholds data integrity.

Applications

Data Reliability and Storage Strategies

The AT24C02 is exemplary when it comes to data reliability due to its non-volatile memory, allowing it to securely retain information without power. In scenarios demanding unwavering data reliability, such as in medical devices for patient monitoring, this component offers a secure framework for preserving patient history. Such applications deeply resonate with you who seek to ensure data consistency, even during power fluctuations, drawing from a desire to maintain accuracy and dependability.

Consumer and Industrial Electronics Adaptation

In the world of consumer electronics, the AT24C02 is integrated across a variety of devices, serving functions such as configuration data storage and system calibration. It plays a key role in home appliances like smart refrigerators, where it manages your preferences and operational modes, thus enhancing your interaction. You can often refine the application of the AT24C02 to boost device efficiency and sustainably reduce energy consumption.

Advancements in Communication Systems

Communication systems utilize the AT24C02 for storing network configurations and addressing data. In environments like remotely managed networks, a dependable memory component ensures swift system recovery with minimal configuration loss, appealing to telecommunications experts who value durability and reliability for large-scale systems. These attributes are mostly cherished as they navigate the complexities of deployment on an expansive scale.

Automotive Innovations in Contemporary Vehicles

In the automotive industry, the AT24C02 is favored for its resilience against environmental stress, making it ideal for storing data related to calibration, fault diagnostics, and vehicle-specific coding. Electronic control units (ECUs) leverage this EEPROM to preserve vehicle settings and operational logs, thus supporting smooth functioning and maintenance endeavors. You can often aspire to design robust systems and implement the AT24C02 to augment the system's resilience, reflecting a commitment to quality and precision.

Implementation in Testing and Measurement Equipment

Testing devices substantially benefit from the capabilities of the AT24C02. These instruments demand precise data logging and configuration storage, and the EEPROM provides steady and consistent measurements. In laboratory settings, the AT24C02 ensures instruments retain calibration data, which is active for achieving consistency in varying results. You can value these reliable storage solutions, recognizing their contribution to precision and accuracy across diverse testing scenarios, driven by an intrinsic dedication to meticulous results.

Package

Manufacturer

Microchip Technology Inc., with its base of operations in Chandler, Arizona, stands as a leading entity in the world of microcontroller and analog semiconductor solutions. They strive to reduce uncertainties while boosting development efficiency, playing a major role in global technological progress. Their product lines, meticulously crafted, are a breeding ground for innovation across varied sectors.

At the core of Microchip's achievements is a steadfast dedication to reliability and innovation, mainly in microcontroller production. From consumer electronics to automotive systems, their products serve dynamic roles in a wide array of applications. The company's distinctive philosophy encompasses not just providing state-of-the-art solutions but also establishing comprehensive support networks. This approach allows industries dependent on their technology to smoothly implement and make the most of Microchip's innovations, striving for superior operational performance.

Datasheet PDF

AT24C02-10PC Datasheets:

Cylindrical Battery Holders.pdf