25LC256T-I/ST

Product Overview

Category: Integrated Circuits (ICs)

Use: The 25LC256T-I/ST 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-speed operation - Wide operating voltage range - Small form factor - Reliable data retention

Package: The 25LC256T-I/ST is available in a surface mount package, specifically the 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence: This IC is designed to store and retrieve data electronically, providing a reliable and efficient solution for non-volatile memory requirements in electronic devices.

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

Detailed Pin Configuration

The 25LC256T-I/ST 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

• High-speed data transfer using the Serial Peripheral Interface (SPI)
• Byte-level read and write operations
• Software and hardware write protection options
• Sequential and random read modes
• Self-timed erase and write cycles for easy integration into systems

Advantages and Disadvantages

Advantages: - Low power consumption makes it suitable for battery-powered devices - Wide operating voltage range allows compatibility with various systems - Small form factor enables space-efficient designs - Reliable data retention ensures long-term storage of critical information

Disadvantages: - Limited storage capacity compared to other memory technologies - Relatively slower write speeds compared to some alternative models - Vulnerable to electromagnetic interference due to its small size

Working Principles

The 25LC256T-I/ST utilizes an EEPROM technology that allows data to be written and erased electrically. It uses a serial interface, specifically the SPI protocol, to communicate with the host system. The chip select (CS) pin is used to enable communication, while the serial clock (SCK) synchronizes data transfer. The serial input (SI) pin is used to send data to the memory, and the serial output (SO) pin transmits data from the memory.

Detailed Application Field Plans

The 25LC256T-I/ST finds applications in various electronic devices, including but not limited to: 1. Consumer electronics: Used for storing configuration settings, user preferences, and firmware updates in devices such as TVs, set-top boxes, and audio players. 2. Industrial automation: Provides non-volatile storage for critical parameters, calibration data, and event logging in industrial control systems. 3. Automotive electronics: Used for storing vehicle-specific data, such as mileage, fault codes, and user preferences in automotive control units. 4. Medical devices: Provides storage for patient data, device settings, and firmware updates in medical equipment like monitors and infusion pumps.

Detailed and Complete Alternative Models

1. 25LC512-I/SN: Similar to the 25LC256T-I/ST but with double the memory capacity (512 kilobits).
2. 25AA1024-I/MS: Offers a larger memory size (1 megabit) and compatibility with both SPI and I2C interfaces.
3. AT24C256C-SSHL-T: Another serial EEPROM with a similar memory size (256 kilobits) but featuring an I2C interface.

These alternative models provide options with different memory capacities and interface compatibility, allowing designers to choose the most suitable option for their specific requirements.

In conclusion, the 25LC256T-I/ST is a versatile serial EEPROM that offers reliable non-volatile storage for various electronic devices. Its low power consumption, small form factor, and wide operating voltage range make it an ideal