25AA040/SN

Product Overview

Category: Integrated Circuit (IC)

Use: Non-volatile Memory

Characteristics: - Serial EEPROM (Electrically Erasable Programmable Read-Only Memory) - Low-power consumption - High reliability - Small form factor - Wide operating voltage range

Package: SOIC (Small Outline Integrated Circuit)

Essence: The 25AA040/SN is a serial EEPROM IC that provides non-volatile memory storage. It is commonly used in various electronic devices to store configuration data, calibration parameters, and other critical information.

Packaging/Quantity: The 25AA040/SN is available in a standard SOIC package. Each package contains one IC.

Specifications

• Memory Size: 4 kilobits (512 bytes)
• Interface: Serial Peripheral Interface (SPI)
• Operating Voltage Range: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1 million cycles
• Data Retention: 200 years

Detailed Pin Configuration

The 25AA040/SN has a total of 8 pins:

1. Chip Select (/CS): Used to enable or disable the device for communication.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Serial Data Input (SI): Used to input data into the device.
4. Serial Data Output (SO): Outputs data from the device.
5. Write Protect (/WP): When held low, prevents write operations.
6. VCC: Power supply voltage input.
7. Ground (GND): Ground reference.
8. Hold (/HOLD): Used to pause serial communication temporarily.

Functional Features

• Byte-level read and write operations
• Software and hardware write protection
• Sequential read mode for faster data retrieval
• Self-timed programming cycle
• Power-saving standby mode

Advantages and Disadvantages

Advantages: - Compact size allows for easy integration into various electronic devices. - Low power consumption makes it suitable for battery-powered applications. - High reliability ensures data integrity over extended periods. - Wide operating voltage range provides compatibility with different systems.

Disadvantages: - Limited storage capacity (4 kilobits) compared to other memory options. - Slower write speed compared to some other EEPROMs. - Lack of built-in security features, such as encryption or authentication.

Working Principles

The 25AA040/SN operates based on the principles of EEPROM technology. It utilizes a floating gate transistor structure to store and retrieve data. The device uses a serial interface (SPI) to communicate with the host microcontroller or system. Data can be written or read byte by byte, allowing for flexible usage.

Detailed Application Field Plans

The 25AA040/SN is widely used in various applications, including but not limited to: - Consumer electronics (e.g., TVs, set-top boxes, remote controls) - Automotive electronics (e.g., infotainment systems, engine control units) - Industrial automation (e.g., sensors, programmable logic controllers) - Medical devices (e.g., patient monitoring systems, diagnostic equipment) - Smart home devices (e.g., smart thermostats, security systems)

Detailed and Complete Alternative Models

Some alternative models to the 25AA040/SN include: - AT24C04 (by Atmel) - CAT24C04 (by ON Semiconductor) - M24C04 (by STMicroelectronics) - X24C04 (by Xicor)

These alternative models offer similar functionality and specifications, providing options for different design requirements.

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