25AA256-E/ST

Product Overview

Category

The 25AA256-E/ST belongs to the category of Serial EEPROM (Electrically Erasable Programmable Read-Only Memory) devices.

Use

It is commonly used for non-volatile data storage in various electronic systems, including consumer electronics, industrial equipment, and automotive applications.

Characteristics

• The 25AA256-E/ST features a small form factor and low power consumption, making it suitable for battery-powered devices.
• It offers high reliability and endurance, with extensive read and write cycles.
• The device supports SPI (Serial Peripheral Interface) for communication with microcontrollers and other integrated circuits.

Package

The 25AA256-E/ST is available in a standard 8-pin SOIC (Small Outline Integrated Circuit) package.

Packaging/Quantity

It is typically supplied in tape and reel packaging, with quantities varying based on customer requirements.

Specifications

• Memory Capacity: 256 Kbits (32 Kbytes)
• Interface: SPI
• Operating Voltage: 1.8V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Write Protect Function
• Data Retention: Minimum 100 years

Detailed Pin Configuration

The 25AA256-E/ST features the following pin configuration: 1. Chip Select (/CS) 2. Serial Clock (SCK) 3. Serial Data Input/Output (SI/SO) 4. Write Protect (/WP) 5. Ground (GND) 6. VCC (Power Supply) 7. Hold (/HOLD) 8. Not Connected (NC)

Functional Features

• Byte and Page Write Modes
• Sequential Read Operation
• Software and Hardware Write Protection
• Self-Timed Write Cycle
• Deep Power-Down Mode for Low Power Consumption

Advantages and Disadvantages

Advantages

• Compact form factor
• Low power consumption
• High reliability and endurance
• Wide operating voltage range

Disadvantages

• Limited storage capacity compared to larger EEPROM devices
• Slower write speeds compared to some other non-volatile memory technologies

Working Principles

The 25AA256-E/ST operates by storing data using electrically programmable cells, allowing for non-volatile data retention even when the power is removed. It communicates with the host system via the SPI interface, enabling seamless integration into various electronic designs.

Detailed Application Field Plans

The 25AA256-E/ST finds application in diverse fields, including: - Consumer Electronics: Smartphones, digital cameras, and portable media players - Industrial Equipment: Programmable logic controllers, sensors, and automation systems - Automotive: Engine control units, infotainment systems, and body control modules

Detailed and Complete Alternative Models

• 25LC256-I/SN: Similar SPI EEPROM with 256 Kbits capacity
• 24AA256-I/P: I2C-compatible EEPROM with 256 Kbits capacity
• AT25DF256-MU: Serial Flash memory with 256 Mbits capacity

In conclusion, the 25AA256-E/ST Serial EEPROM offers a reliable and efficient solution for non-volatile data storage in a wide range of electronic applications, with its compact design, low power consumption, and robust performance making it a popular choice among designers and engineers.

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