AT24C21-10SC-2.5

Product Overview

Category

AT24C21-10SC-2.5 belongs to the category of Serial EEPROM (Electrically Erasable Programmable Read-Only Memory) integrated circuits.

Use

This product is commonly used for non-volatile storage in various electronic devices, such as microcontrollers, computers, and consumer electronics.

Characteristics

• Non-volatile memory: The data stored in AT24C21-10SC-2.5 remains even when power is removed.
• High endurance: This EEPROM can withstand a large number of read and write cycles.
• Low power consumption: It operates at low voltage levels, making it suitable for battery-powered devices.
• Small form factor: The package size of AT24C21-10SC-2.5 is compact, allowing for easy integration into different systems.
• I2C interface: It utilizes the widely-used I2C communication protocol for data transfer.

Package and Quantity

AT24C21-10SC-2.5 is available in a small surface mount package (SC) with 8 pins. It is typically sold in reels or tubes containing multiple units.

Specifications

• Memory capacity: 2,048 bits (256 bytes)
• Operating voltage: 2.5V
• Maximum clock frequency: 400 kHz
• Write cycle time: 10 ms (maximum)
• Data retention: 100 years (minimum)

Pin Configuration

The pin configuration of AT24C21-10SC-2.5 is as follows:

```

---

| | | 1 2 3 | | | | 4 5 6 | | | | 7 8 | |_______________| ```

1. SDA: Serial Data Input/Output
2. SCL: Serial Clock Input
3. VCC: Power Supply (2.5V)
4. WP: Write Protect
5. GND: Ground
6. A0: Address Input 0
7. A1: Address Input 1
8. NC: No Connection

Functional Features

• Random access: AT24C21-10SC-2.5 allows for direct read and write operations to any memory location.
• Byte-wise operation: It supports individual byte read and write operations, providing flexibility in data manipulation.
• Hardware write protection: The WP pin can be used to protect the memory from accidental writes.
• Software write protection: Certain memory areas can be software protected to prevent unauthorized modifications.

Advantages and Disadvantages

Advantages

• Compact size and low power consumption make it suitable for portable devices.
• High endurance ensures reliable data storage over a long period.
• I2C interface enables easy integration with various microcontrollers and systems.

Disadvantages

• Limited memory capacity compared to other EEPROM options.
• Slower write cycle time may affect performance in time-critical applications.

Working Principles

AT24C21-10SC-2.5 utilizes electrically erasable floating-gate transistors to store data. When writing, an electrical charge is applied to the floating gate, altering its threshold voltage. This change determines whether the transistor represents a logical "0" or "1". Reading involves sensing the threshold voltage of each transistor to retrieve the stored data.

Detailed Application Field Plans

AT24C21-10SC-2.5 finds application in various fields, including: 1. Embedded systems: Used for storing configuration data, calibration values, and firmware updates. 2. Industrial automation: Employed for storing device parameters, production data, and event logs. 3. Automotive electronics: Utilized for storing vehicle settings, sensor calibration data, and fault codes. 4. Smart home devices: Used for storing user preferences, device configurations, and security credentials.

Alternative Models

Several alternative models with similar functionality to AT24C21-10SC-2.5 include: 1. AT24C01A-10SC-2.5 2. AT24C02C-10SC-2.5 3. AT24C04D-10SC-2.5 4. AT24C08B-10SC-2.5 5. AT24C16A-10SC-2.5

These models offer different memory capacities while maintaining compatibility with the I2C interface.

In conclusion, AT24C21-10SC-2.5 is a compact and versatile Serial EEPROM integrated circuit. Its non-volatile memory, high endurance, and low power consumption make it suitable for various electronic applications. However, its limited capacity and slower write cycle time should be considered when selecting an EEPROM for specific requirements.