Encyclopedia Entry: 25AA640A-I/MS

Product Overview

Category

The 25AA640A-I/MS belongs to the category of Serial EEPROM (Electrically Erasable Programmable Read-Only Memory) integrated circuits.

Use

This product is commonly used for non-volatile data storage in various electronic devices, such as microcontrollers, sensors, and communication modules.

Characteristics

• The 25AA640A-I/MS offers a storage capacity of 64 kilobits (8 kilobytes).
• It operates on a low voltage range of 1.8V to 5.5V, making it suitable for a wide range of applications.
• This EEPROM supports high-speed SPI (Serial Peripheral Interface) communication protocol.
• It provides reliable data retention and endurance, with a typical endurance of 1 million write cycles.

Package

The 25AA640A-I/MS is available in an industry-standard 8-pin Small Outline Integrated Circuit (SOIC) package.

Essence

The essence of this product lies in its ability to store and retrieve digital information reliably in a compact and low-power package.

Packaging/Quantity

The 25AA640A-I/MS is typically supplied in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Storage Capacity: 64 kilobits (8 kilobytes)
• Operating Voltage Range: 1.8V to 5.5V
• Communication Protocol: SPI (Serial Peripheral Interface)
• Endurance: 1 million write cycles (typical)
• Data Retention: 200 years (typical)

Detailed Pin Configuration

The 25AA640A-I/MS features the following pin configuration:

1. Chip Select (/CS)
2. Serial Clock (SCK)
3. Serial Data Input/Output (SI/O)
4. Write Protect (/WP)
5. Ground (GND)
6. Serial Data Output (SO)
7. Hold (/HOLD)
8. Power Supply (VCC)

Functional Features

• Byte and Page Write Operations: The 25AA640A-I/MS allows individual byte or page-level write operations, providing flexibility in data storage.
• Sequential Read: It supports sequential read operations, enabling efficient retrieval of stored data.
• Software Protection: The write protect pin (/WP) can be used to prevent accidental modification of stored data.
• Hardware Hold: The hold pin (/HOLD) allows pausing ongoing operations without losing data.

Advantages and Disadvantages

Advantages

• Compact and low-power design
• Wide operating voltage range
• High-speed SPI communication protocol
• Reliable data retention and endurance
• Flexible write and read operations

Disadvantages

• Limited storage capacity compared to larger EEPROM variants
• Requires an external microcontroller or interface for communication

Working Principles

The 25AA640A-I/MS utilizes the principles of EEPROM technology. It consists of a grid of memory cells that can be electrically programmed and erased. The stored data is retained even when power is removed from the device. The SPI communication protocol enables seamless interaction between the host microcontroller and the EEPROM, allowing for efficient read and write operations.

Detailed Application Field Plans

The 25AA640A-I/MS finds applications in various fields, including but not limited to: 1. Internet of Things (IoT) devices 2. Automotive electronics 3. Industrial control systems 4. Medical equipment 5. Consumer electronics

Detailed and Complete Alternative Models

Some alternative models to the 25AA640A-I/MS include: 1. AT24C64 - Atmel Corporation 2. CAT24C64 - ON Semiconductor 3. M24C64 - STMicroelectronics 4. 93LC66B - Microchip Technology Inc. 5. FM24C64 - Cypress Semiconductor

These alternative models offer similar functionality and can be considered as substitutes based on specific requirements.

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