Encyclopedia Entry: 25AA256T-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: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Stores and retrieves digital information in various electronic devices
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel

Specifications

• Memory Size: 256 kilobits (32 kilobytes)
• Interface: Serial Peripheral Interface (SPI)
• Operating Voltage: 1.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1 Million cycles
• Data Retention: 200 Years
• Organization: 32,768 x 8 bits
• Clock Frequency: Up to 10 MHz

Detailed Pin Configuration

The 25AA256T-I/ST IC has the following pin configuration:

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

Functional Features

• Non-volatile memory: Retains data even when power is disconnected
• Serial interface: Allows easy integration with microcontrollers and other devices
• Low power consumption: Ideal for battery-powered applications
• High-speed data transfer: Supports clock frequencies up to 10 MHz
• Write protection: Provides a write protect pin for enhanced security

Advantages and Disadvantages

Advantages: - High-density memory storage - Reliable and durable data retention - Easy integration with various electronic devices - Low power consumption - Secure write protection feature

Disadvantages: - Limited memory size compared to other EEPROM options - Requires an external microcontroller or device for data access

Working Principles

The 25AA256T-I/ST is based on Electrically Erasable Programmable Read-Only Memory (EEPROM) technology. It utilizes a serial interface, allowing data to be written and read in a byte-wise manner. The IC uses a Serial Peripheral Interface (SPI) protocol for communication with the controlling device. When powered, the IC can store and retrieve digital information reliably, even in the absence of power.

Detailed Application Field Plans

The 25AA256T-I/ST IC finds applications in various electronic devices that require non-volatile memory storage. Some common application fields include: 1. Consumer Electronics: Used in smart TVs, set-top boxes, and audio systems for storing configuration settings and user preferences. 2. Automotive: Employed in car infotainment systems, instrument clusters, and engine control units for data logging and parameter storage. 3. Industrial Automation: Integrated into programmable logic controllers (PLCs), sensors, and industrial equipment for storing calibration data and system parameters. 4. Medical Devices: Utilized in medical instruments and monitoring devices for storing patient data, device configurations, and firmware updates.

Detailed and Complete Alternative Models

1. 25LC256-I/SN: Similar 256 kilobit EEPROM IC with SPI interface, available in 8-pin SOIC package.
2. AT25080AN-10SU-2.7: 8 kilobyte EEPROM IC with SPI interface, available in 8-pin SOIC package.
3. CAT24C256WI-GT3: 256 kilobit EEPROM IC with I2C interface, available in 8-pin SOIC package.

Note: The above alternative models are provided for reference and may have different specifications and features.

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