25LC256T-I/SN

Product Overview

Category: Integrated Circuits (ICs)

Use: The 25LC256T-I/SN is a serial EEPROM (Electrically Erasable Programmable Read-Only Memory) that provides non-volatile storage of data. It is commonly used in various electronic devices for storing configuration settings, calibration data, and other small amounts of information.

Characteristics: - Low power consumption - High-speed operation - Wide operating voltage range - Small form factor - Reliable data retention

Package: The 25LC256T-I/SN is available in an 8-pin SOIC (Small Outline Integrated Circuit) package, which allows for easy integration into circuit boards.

Essence: This IC is designed to provide reliable and non-volatile storage of data in electronic devices, ensuring that important information is retained even when power is removed.

Packaging/Quantity: The 25LC256T-I/SN is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Memory Size: 256 kilobits (32 kilobytes)
• Interface: Serial Peripheral Interface (SPI)
• Operating Voltage Range: 2.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1,000,000 cycles
• Data Retention: 200 years

Pin Configuration

The 25LC256T-I/SN has the following pin configuration:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | CS | Chip Select | | 2 | SCK | Serial Clock | | 3 | SI | Serial Input | | 4 | SO | Serial Output | | 5 | WP | Write Protect | | 6 | VSS | Ground | | 7 | HOLD | Hold Input | | 8 | VCC | Power Supply |

Functional Features

• Byte-level read and write operations
• Sequential read and write operations
• Software write protection
• Hardware write protection using the WP pin
• Deep power-down mode for ultra-low power consumption
• Self-timed programming cycle

Advantages and Disadvantages

Advantages: - Low power consumption makes it suitable for battery-powered devices - High-speed operation allows for efficient data transfer - Wide operating voltage range provides flexibility in various applications - Small form factor enables integration into space-constrained designs - Reliable data retention ensures long-term storage of critical information

Disadvantages: - Limited storage capacity compared to other memory technologies - Requires a serial interface, which may not be suitable for all applications - Relatively higher cost per bit compared to larger memory devices

Working Principles

The 25LC256T-I/SN operates based on the principles of EEPROM technology. It uses a floating gate transistor structure to store charge, which represents the binary data. The stored charge can be electrically erased and reprogrammed, allowing for non-volatile data storage.

During write operations, the data is transferred serially through the SPI interface and stored in the memory cells. Reading data involves retrieving the stored charge from the memory cells and transferring it back through the SPI interface.

Detailed Application Field Plans

The 25LC256T-I/SN finds application in various electronic devices that require non-volatile storage of configuration settings, calibration data, or small amounts of information. Some common application fields include:

1. Consumer Electronics:

   • Smartphones
   • Tablets
   • Digital cameras
   • Gaming consoles

2. Automotive:

   • Engine control units
   • Infotainment systems
   • Instrument clusters

3. Industrial Automation:

   • Programmable logic controllers (PLCs)
   • Human-machine interfaces (HMIs)
   • Data loggers

4. Medical Devices:

   • Patient monitoring systems
   • Portable medical equipment
   • Implantable devices

Detailed and Complete Alternative Models

1. 25LC512-I/SN: Similar to the 25LC256T-I/SN, but with double the memory size (512 kilobits).
2. 25AA256-I/SN: A compatible alternative from a different manufacturer, offering the same memory size and functionality.
3. AT25080AN-10SU-2.7: Another serial EEPROM with similar specifications, but from a different IC manufacturer.

These alternative models can be considered based on specific requirements and availability in the market.

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