25LC256T-I/SM

Product Overview

Category: Integrated Circuits (ICs)

Use: The 25LC256T-I/SM 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 - Serial interface for easy integration

Package: The 25LC256T-I/SM is available in an industry-standard SOIC (Small Outline Integrated Circuit) package, which allows for easy soldering onto printed circuit boards.

Essence: This IC is designed to provide reliable and non-volatile storage for critical data in electronic systems. It offers a compact and efficient solution for storing information that needs to be retained even when power is removed.

Packaging/Quantity: The 25LC256T-I/SM 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: 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
• Package Type: SOIC-8

Pin Configuration

The 25LC256T-I/SM has 8 pins arranged as follows:

┌───┬───┐ │ 1 │ 8 │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ 4 │ 5 │ └───┴───┘

1. Chip Select (CS): Used to enable or disable the IC for communication.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Master Input Slave Output (MISO): Transmits data from the IC to the master device.
4. Ground (GND): Connected to the ground reference of the system.
5. Serial Data Input/Output (SDI/SDO): Bi-directional data line for communication.
6. Write Protect (WP): Allows write protection of the memory array.
7. VCC: Power supply voltage input.
8. Hold (HOLD): Pauses serial communication without resetting the IC.

Functional Features

• Byte-level read and write operations
• Sequential read and write modes for efficient data transfer
• Software write protection for enhanced security
• Self-timed programming cycle for easy integration
• Low-power standby mode for reduced energy consumption

Advantages and Disadvantages

Advantages: - Compact size and low power consumption make it suitable for portable devices - High reliability ensures data integrity in critical applications - Wide operating voltage range allows compatibility with various systems - Easy integration with a standard serial interface

Disadvantages: - Limited storage capacity compared to other memory technologies - Slower write speeds compared to some alternative models - Relatively higher cost per kilobyte of storage

Working Principles

The 25LC256T-I/SM uses EEPROM technology, which allows for non-volatile storage of data. It utilizes an electrically controlled floating gate to store charge, representing binary information. The stored data can be read, modified, or erased using the serial interface provided.

During write operations, the IC applies a high voltage to the floating gate, allowing electrons to tunnel through an insulating layer and modify the charge. Reading data involves sensing the charge level on the floating gate, while erasing data resets the charge to its original state.

Application Field Plans

The 25LC256T-I/SM is widely used in various electronic devices and systems, including but not limited to: - Consumer electronics (e.g., smartwatches, digital cameras) - Automotive applications (e.g., engine control units, infotainment systems) - Industrial automation (e.g., programmable logic controllers, sensors) - Medical devices (e.g., patient monitoring systems, diagnostic equipment) - Communication systems (e.g., routers, modems)

Its compact size, low power consumption, and reliable performance make it suitable for applications where space, energy efficiency, and data integrity are crucial.

Alternative Models

For users seeking alternative options, the following models offer similar functionality to the 25LC256T-I/SM: - AT25080A-10PU-2