Encyclopedia Entry: 25AA256T-I/MF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Non-volatile Serial EEPROM Memory
• Characteristics: High-density, low-power, small form factor
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Data storage and retrieval in electronic devices
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

The 25AA256T-I/MF is a non-volatile serial EEPROM memory chip manufactured by Microchip Technology Inc. It offers a storage capacity of 256 kilobits (32 kilobytes) and operates on a single power supply voltage of 1.8V to 5.5V. The device supports the Serial Peripheral Interface (SPI) communication protocol, enabling easy integration with various microcontrollers and other digital systems.

Pin Configuration

The 25AA256T-I/MF features an 8-pin Small Outline Integrated Circuit (SOIC) package. The pin configuration is as follows:

| 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

• Non-volatile memory: Retains data even when power is disconnected
• High-density storage: 256 kilobits (32 kilobytes) capacity
• Low-power consumption: Ideal for battery-powered devices
• SPI interface: Easy integration with microcontrollers and digital systems
• Write protection: WP pin allows for hardware write protection

Advantages and Disadvantages

Advantages: - Compact size and low power consumption make it suitable for portable devices - High-density storage capacity enables storing large amounts of data - SPI interface ensures compatibility with a wide range of systems - Write protection feature enhances data security

Disadvantages: - Limited storage capacity compared to other memory technologies - Slower data transfer rate compared to some other memory types

Working Principles

The 25AA256T-I/MF utilizes EEPROM (Electrically Erasable Programmable Read-Only Memory) technology. It stores data in a grid of memory cells, which can be electrically programmed and erased. The device operates by sending commands and data through the SPI interface. When data is written, the memory cells are programmed with electrical charges, and when data is read, the charges are detected and converted back into binary information.

Application Field Plans

The 25AA256T-I/MF is widely used in various electronic devices that require non-volatile memory for data storage. Some common application fields include: - Consumer electronics (e.g., smartphones, tablets, digital cameras) - Automotive systems (e.g., infotainment systems, engine control units) - Industrial automation (e.g., programmable logic controllers, sensors) - Medical devices (e.g., patient monitoring systems, diagnostic equipment)

Alternative Models

For those seeking alternative options, the following models offer similar functionality and features: - AT25080AN-10SU-2.7 by Adesto Technologies - CAT24C256WI-GT3 by ON Semiconductor - M95040-WMN6TP by STMicroelectronics

These alternatives provide comparable storage capacities, operating voltages, and package options.

In conclusion, the 25AA256T-I/MF is a high-density, low-power non-volatile serial EEPROM memory chip. Its compact size, SPI interface, and write protection feature make it suitable for a wide range of electronic devices. While it may have limitations in terms of storage capacity and data transfer rate, it remains a reliable choice for applications requiring non-volatile memory.