24AA256T/SM

Product Overview

Category

The 24AA256T/SM belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This chip is commonly used for non-volatile data storage in various electronic devices, such as microcontrollers, embedded systems, and consumer electronics.

Characteristics

• Non-volatile: Retains stored data even when power is removed.
• Electrically erasable: Allows data to be erased and reprogrammed electronically.
• High storage capacity: The 24AA256T/SM has a storage capacity of 256 kilobits (32 kilobytes).
• Low power consumption: Designed to operate with minimal power requirements.
• Wide operating voltage range: Can function within a voltage range of 1.7V to 5.5V.
• I2C interface: Communicates using the widely-used I2C protocol.

Package

The 24AA256T/SM is available in a surface mount package (SM) for easy integration onto circuit boards.

Essence

The essence of the 24AA256T/SM is its ability to provide reliable and non-volatile data storage in a compact and low-power package.

Packaging/Quantity

These chips are typically packaged in reels or tubes, with quantities varying depending on the manufacturer's specifications.

Specifications

• Storage Capacity: 256 kilobits (32 kilobytes)
• Operating Voltage Range: 1.7V to 5.5V
• Interface: I2C
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1,000,000 cycles
• Data Retention: 200 years

Detailed Pin Configuration

The 24AA256T/SM has a total of 8 pins, which are assigned specific functions as follows:

1. VCC: Power supply voltage
2. SDA: Serial data input/output for I2C communication
3. SCL: Serial clock input for I2C communication
4. WP: Write protect pin (optional)
5. A0, A1, A2: Address selection pins
6. GND: Ground

Functional Features

• Random access: Allows reading and writing of data at any memory location.
• Page write mode: Enables multiple bytes to be written in a single operation, improving efficiency.
• Software write protection: Provides the option to protect certain memory areas from being overwritten.
• Sequential read mode: Facilitates fast and efficient reading of consecutive memory locations.

Advantages and Disadvantages

Advantages

• Non-volatile storage: Data remains intact even during power loss or device shutdown.
• Compact size: The chip's small form factor allows for easy integration into various electronic devices.
• Low power consumption: Ideal for battery-powered applications.
• High endurance: Can withstand frequent write operations without significant degradation.

Disadvantages

• Limited storage capacity: While suitable for many applications, larger data storage requirements may necessitate alternative solutions.
• Relatively slow write speed: Writing data to the chip can take longer compared to other memory technologies.

Working Principles

The 24AA256T/SM utilizes an array of floating-gate transistors to store data. When data is written, an electric charge is trapped within the floating gate, altering the transistor's behavior. This charge can be removed during the erasing process, allowing the transistor to return to its original state. The stored data can then be read by applying appropriate voltages to the memory cells.

Detailed Application Field Plans

The 24AA256T/SM finds application in various fields, including: 1. Industrial automation: Used for storing configuration data, calibration values, and system parameters in programmable logic controllers (PLCs). 2. Automotive electronics: Employed for storing vehicle settings, sensor data, and firmware updates in electronic control units (ECUs). 3. Consumer electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for storing user preferences, application data, and firmware.

Detailed and Complete Alternative Models

1. 24LC256: Similar to the 24AA256T/SM, this chip offers the same storage capacity and I2C interface but comes in a different package.
2. AT24C256: Another alternative with identical specifications, this chip is manufactured by a different company and may have slight variations in performance characteristics.

Please note that the above alternatives are just examples, and there may be other similar EEPROM chips available in the market.

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