Encyclopedia Entry: 25AA256X-I/ST

Product Overview

• Category: Integrated Circuit (IC)
• Use: Non-volatile Serial EEPROM Memory
• Characteristics: High-density, low-power, and reliable data storage solution
• Package: STMicroelectronics SOIC-8 package
• Essence: The 25AA256X-I/ST is a serial EEPROM memory chip designed for storing and retrieving data in electronic devices.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per reel.

Specifications

• Memory Size: 256 kilobits (32 kilobytes)
• Interface: SPI (Serial Peripheral Interface)
• Operating Voltage: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1 million write cycles
• Data Retention: 200 years

Detailed Pin Configuration

The 25AA256X-I/ST features an 8-pin Small Outline Integrated Circuit (SOIC) package with the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 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-Density Storage: The 25AA256X-I/ST offers a large memory size of 256 kilobits, allowing for ample data storage capacity.
• Low-Power Operation: This EEPROM memory chip operates at low power, making it suitable for battery-powered devices.
• Reliable Data Retention: With a data retention period of up to 200 years, the stored information remains intact even during power loss or device shutdown.
• SPI Interface: The Serial Peripheral Interface (SPI) allows for easy integration with microcontrollers and other digital systems.

Advantages and Disadvantages

Advantages: - High-density storage capacity - Low-power operation - Long data retention period - Easy integration with SPI interface

Disadvantages: - Limited write endurance (1 million cycles) - Requires external components for proper operation

Working Principles

The 25AA256X-I/ST utilizes an electrically erasable programmable read-only memory (EEPROM) technology. It stores data by electronically charging and discharging specific memory cells within the chip. The SPI interface enables communication between the memory chip and the controlling device, allowing for data read and write operations.

Detailed Application Field Plans

The 25AA256X-I/ST is widely used in various electronic devices that require non-volatile data storage, such as: - Consumer electronics (smartphones, tablets, digital cameras) - Automotive systems (ECUs, infotainment systems) - Industrial control systems - Medical devices - IoT devices

Detailed and Complete Alternative Models

• AT25080A-10PU-2.7 (Atmel)
• CAT24C256WI-GT3 (ON Semiconductor)
• M95040-WMN6TP (STMicroelectronics)
• 24LC256-I/P (Microchip Technology)

Note: The above alternative models are similar EEPROM memory chips with comparable specifications and functionalities.

This encyclopedia entry provides an overview of the 25AA256X-I/ST serial EEPROM memory chip. Its high-density storage, low-power operation, and reliable data retention make it a popular choice for various electronic applications.