Part Number: 24AA01T-I/OT

Manufacturer: Microchip Technology

Description: IC EEPROM 1KBIT I2C SOT23-5

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of 24AA01T-I/OT

Datasheet  24AA01T-I/OT datasheet
Category Integrated Circuits (ICs)
Family Memory
Manufacturer Microchip Technology
Packaging Tape & Reel (TR)
Part Status Active
Format – Memory EEPROMs – Serial
Memory Type EEPROM
Memory Size 1K (128 x 8)
Speed 100kHz, 400kHz
Interface I2C, 2-Wire Serial
Voltage – Supply 1.7 V ~ 5.5 V
Operating Temperature -40°C ~ 85°C (TA)
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-23-5


The 24AA01T-I/OT is a 1Kbit EEPROM memory integrated circuit designed for I²C communication. With a compact SOT-23-5 package and support for high-speed communication, this IC is ideal for applications requiring non-volatile memory storage in a small footprint. This guide aims to provide a comprehensive overview of the 24AA01T-I/OT, including its features, specifications, applications, and usage considerations.

Features and Specifications of 24AA01T-I/OT

EEPROM Memory Capacity and Organization

  • The 24AA01T-I/OT is a 1Kbit (128 bytes) EEPROM memory IC.
  • Organized into 16 pages, each containing 8 bytes.
  • Offers byte-level read and write operations.

I²C Communication Speed (400 kHz)

  • Supports I²C communication protocol.
  • Operates at a maximum clock frequency of 400 kHz (fast mode).
  • Enables efficient data transfer between the memory IC and the microcontroller.

Write and Erase Cycles:

  • The typical write cycle time is 5 ms.
  • The typical erase cycle time is 5 ms.
  • Endurance of up to 1,000,000 write cycles per byte.
  • Designed for reliable and long-lasting data storage.

Data Retention Period:

  • Data retention period of up to 200 years.
  • Ensures stored data integrity over an extended period.

SOT-23-5 Package Details:

  • Packaged in a small-outline transistor (SOT) package.
  • The SOT-23-5 package variant includes five pins.
  • Pinout: VCC, SDA (serial data), SCL (serial clock), WP (write-protect), GND.

Functional Description of 24AA01T-I/OT

EEPROM Memory Organization

The 24AA01T-I/OT EEPROM memory is organized into 16 pages, each containing 8 bytes. This results in a total of 128 bytes of storage capacity. The organization is as follows:

  • Addressing:Each page has a unique address ranging from 0 to 15. This allows for easy access to specific pages within the EEPROM.

Read and Write Operations Explained

  • Read Operation:To read data from the EEPROM, the microcontroller initiates an I²C read sequence. The microcontroller sends the device’s I²C address, followed by the page address and the byte address within that page. The EEPROM responds with the requested data.
  • Write Operation:Writing data to the EEPROM involves sending an I²C write sequence. The microcontroller sends the device’s I²C address, followed by the page address and the byte address where data needs to be written. After receiving the data byte, the EEPROM stores it in the specified location.

Acknowledgment and Addressing in I²C

I²C communication relies on acknowledgment signals to ensure reliable data transfer. After sending the device address during read or write operations, the receiving device (EEPROM) sends an acknowledgment bit to confirm its readiness to receive or transmit data.

  • Addressing:In I²C, each device on the bus is identified by a unique 7-bit address. The 24AA01T-I/OT EEPROM has a fixed address structure, with the most significant bits set according to the device’s hardware configuration. The least significant bits can be set using the A0, A1, and A2 pins (not included in the SOT-23-5 package variant).
  • Acknowledgment:After transmitting a byte, the sending device releases the SDA (data) line, and the receiving device pulls the SDA line low to acknowledge the successful receipt of the data. This ensures that the data transmission was successful.

Note: It’s important to adhere to the correct addressing format and acknowledgment process during I²C communication to avoid data corruption and communication errors.

Application Examples for 24AA01T-I/OT

Sensor Calibration Data Storage

In various electronic systems that involve sensors, accurate calibration is crucial for reliable data measurements. The 24AA01T-I/OT EEPROM can be employed to store calibration coefficients, offsets, and other calibration parameters specific to sensors. This ensures that even if the system is powered off, the calibration data remains intact. Examples of such applications include:

  • Temperature Sensors:Storing temperature offset and compensation values for precision temperature sensors used in environmental monitoring or industrial processes.
  • Pressure Sensors:Storing calibration data for pressure sensors used in barometric pressure measurement, altimeters, and industrial applications.
  • Accelerometers and Gyroscopes:Storing calibration factors for motion sensors used in navigation, robotics, and motion tracking.

System Configuration Storage

Many electronic devices require configuration settings that persist across power cycles. The 24AA01T-I/OT EEPROM is ideal for storing such settings, allowing the system to maintain its customized behavior. Examples include:

  • Embedded Systems:Storing device-specific configurations such as display brightness, language preferences, and user interface settings in embedded systems.
  • IoT Devices:Storing network configuration details, security keys, and device-specific parameters in IoT devices to maintain connectivity and security settings.
  • Automotive Electronics:Storing user preferences for seat positions, climate control, and infotainment settings in vehicles.

User Data Storage

In applications where user-generated data needs to be preserved, the EEPROM can be utilized for storing user profiles, user-generated content, and other personalized data. Examples include:

  • Consumer Electronics:Storing user profiles, settings, and preferences in gadgets like smartwatches, fitness trackers, and remote controls.
  • Gaming Consoles:Storing game progress, user profiles, and customized settings in gaming consoles.
  • Digital Audio Devices:Storing playlists, equalizer settings, and user presets in audio devices.

These application examples illustrate the versatility of the 24AA01T-I/OT EEPROM in a wide range of electronic systems, where non-volatile memory storage is essential to maintain critical data and configurations.

Environmental Considerations for 24AA01T-I/OT

Operating Temperature Range

The 24AA01T-I/OT EEPROM has a specified operating temperature range within which it can reliably function. This range ensures that the IC operates within its designed parameters and provides optimal performance. The typical operating temperature range for this EEPROM IC is -40°C to +85°C. It’s important to ensure that the operating environment stays within this range to prevent any potential damage or performance issues.

ESD Protection Recommendations

Electrostatic discharge (ESD) can pose a serious risk to electronic components, potentially leading to malfunction or permanent damage. To protect the 24AA01T-I/OT EEPROM from ESD, consider implementing the following measures:

  • Use proper ESD handling equipment, such as grounding straps and anti-static mats, when handling the IC during assembly or testing.
  • Store and transport the EEPROM in anti-static packaging to prevent ESD damage during shipping or storage.
  • Ensure that the surrounding environment and workstations are properly grounded to minimize the risk of ESD events.

Storage Conditions

Proper storage conditions are essential to maintain the integrity and longevity of electronic components, including the 24AA01T-I/OT EEPROM:

  • Store the IC in a dry and clean environment to prevent moisture from affecting its performance.
  • Avoid exposing the IC to extreme temperatures, humidity, direct sunlight, and sources of electromagnetic interference.
  • Keep the IC in its original packaging or in anti-static bags to protect it from potential ESD damage during storage.


The 24AA01T-I/OT EEPROM memory IC is a versatile solution for non-volatile data storage. Its compact size, efficient I²C communication, and durability make it invaluable in various applications. From sensor calibration data to system configurations, this IC ensures reliable data retention and enhances user experience. Its integration simplifies design and development, allowing focus on innovation without data loss concerns. Always refer to the datasheet for specific guidance. The 24AA01T-I/OT is a reliable, adaptable choice in the dynamic world of electronics.

To learn more and acquire the 24AA01T-I/OT, contact ICRFQ, a leading electronic component distributor in China, for the best product at an affordable price. Step into the future of automotive progress today.

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