25LC640T-E/SN

Product Overview

Category: Integrated Circuits (ICs)

Use: The 25LC640T-E/SN is a serial EEPROM (Electrically Erasable Programmable Read-Only Memory) that provides non-volatile storage for various electronic devices. It is commonly used in applications where small amounts of data need to be stored and retrieved.

Characteristics: - Low power consumption - High reliability - Small form factor - Wide operating voltage range - Fast write and read operations

Package: The 25LC640T-E/SN is available in an 8-pin SOIC (Small Outline Integrated Circuit) package, which allows for easy integration into circuit boards.

Essence: This product is essential for storing and retrieving data in electronic devices, providing a reliable and efficient solution for non-volatile memory requirements.

Packaging/Quantity: The 25LC640T-E/SN is typically sold in reels or tubes, with each reel or tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Memory Size: 64 kilobits (8 kilobytes)
• Interface: Serial Peripheral Interface (SPI)
• Operating Voltage Range: 2.5V to 5.5V
• Write Endurance: 1,000,000 cycles
• Data Retention: 200 years
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 25LC640T-E/SN has the following pin configuration:

1. Chip Select (/CS): Used to enable or disable the device for communication.
2. Serial Clock (SCK): Provides the clock signal for synchronous communication.
3. Serial Data Input (SI): Used to input data during write operations.
4. Serial Data Output (SO): Outputs data during read operations.
5. Write Protect (/WP): Allows protection of the memory from accidental writes.
6. VCC: Power supply voltage input.
7. Ground (GND): Ground reference for the device.
8. Hold (/HOLD): Used to pause serial communication temporarily.

Functional Features

• Byte-level Read and Write Operations: The 25LC640T-E/SN allows individual bytes of data to be read from or written to the memory, providing flexibility in data manipulation.
• Sequential Read: It supports sequential read operations, allowing for efficient retrieval of consecutive data bytes.
• Hardware Write Protection: The write protect feature ensures that the memory contents are not accidentally modified, enhancing data integrity.
• Low Power Consumption: The device operates at low power levels, making it suitable for battery-powered applications.
• High Reliability: With a high write endurance and long data retention period, the 25LC640T-E/SN offers reliable data storage over an extended period.

Advantages and Disadvantages

Advantages: - Compact size and easy integration into circuit boards - Wide operating voltage range allows compatibility with various systems - Fast read and write operations enhance overall system performance - High reliability ensures data integrity - Low power consumption extends battery life in portable devices

Disadvantages: - Limited storage capacity compared to other memory technologies - Requires a dedicated SPI interface for communication

Working Principles

The 25LC640T-E/SN utilizes EEPROM technology, which allows for non-volatile storage of data. It uses an SPI interface to communicate with the host microcontroller or system. During write operations, data is sent serially to the device and stored in the memory cells. Read operations retrieve the stored data by sequentially accessing the memory locations.

Detailed Application Field Plans

The 25LC640T-E/SN finds applications in various electronic devices, including but not limited to: - Consumer electronics: Used for storing configuration data, user settings, and firmware updates in devices such as TVs, set-top boxes, and audio systems. - Industrial automation: Enables storage of calibration data, device parameters, and system configurations in industrial control systems. - Automotive electronics: Utilized for storing vehicle-specific data, sensor calibration values, and firmware updates in automotive modules. - Medical devices: Provides non-volatile memory for storing patient data, device settings, and firmware updates in medical equipment.

Detailed and Complete Alternative Models

• 25LC320A: A lower capacity variant with 32 kilobits (4 kilobytes) of memory.
• 25LC1024: A higher capacity variant with 1 megabit (128 kilobytes) of memory.
• 25AA040: A similar EEPROM with a smaller memory size of 4 kilobits (512 bytes).
• 24LC256: An I2C-compatible EEPROM with a larger memory size of 256 kilobits (32 kilobytes).

These alternative models offer different memory capacities and communication interfaces, allowing users to choose the most