Encyclopedia Entry: 25AA640A-I/ST

Product Overview

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

Specifications

• Memory Size: 64 kilobits (8 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 cycles
• Data Retention: 200 Years

Detailed Pin Configuration

The 25AA640A-I/ST IC has a total of 8 pins arranged 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
• Serial interface: Allows easy integration with microcontrollers and other devices
• Low power consumption: Ideal for battery-powered applications
• High-speed data transfer: Supports SPI communication protocol
• Write protection: Prevents accidental modification of stored data
• Hold input: Pauses ongoing operations without losing data

Advantages

• Compact size and high density enable integration in space-constrained designs
• Wide operating voltage range allows compatibility with various systems
• Long data retention period ensures reliable storage of critical information
• High write endurance withstands frequent read/write cycles
• SPI interface simplifies communication with other devices

Disadvantages

• Limited memory capacity may not be suitable for applications requiring larger storage
• Lack of additional security features, such as encryption or authentication

Working Principles

The 25AA640A-I/ST is based on Electrically Erasable Programmable Read-Only Memory (EEPROM) technology. It utilizes a floating gate transistor structure to store and retrieve digital data. The IC communicates with the host device through the SPI interface, enabling efficient data transfer and control.

Detailed Application Field Plans

The 25AA640A-I/ST finds application in various electronic devices, including but not limited to: - Consumer electronics: Smartphones, tablets, digital cameras - Automotive systems: Infotainment, instrument clusters, engine control units - Industrial equipment: Data loggers, sensors, control systems - Medical devices: Patient monitors, diagnostic equipment, infusion pumps - Communication devices: Routers, modems, network switches

Detailed Alternative Models

• AT25080AN-10SU-2.7: 8 kilobit SPI Serial EEPROM, 2.7V, SOIC package
• CAT24C256WI-GT3: 256 kilobit I2C Serial EEPROM, 1.8V, TSSOP package
• M93C66-WMN6TP: 4 kilobit Microwire Serial EEPROM, 5V, SOIC package
• 24AA1025-I/SN: 128 kilobit I2C Serial EEPROM, 2.5V, SOP package

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

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This encyclopedia entry provides an overview of the 25AA640A-I/ST, a non-volatile serial EEPROM memory IC. It includes information about its category, use, characteristics, package, essence, packaging/quantity, specifications, detailed pin configuration, functional features, advantages and disadvantages, working principles, detailed application field plans, and alternative models.