Encyclopedia Entry: 25AA128-I/W16K

Product Information Overview

Category: Integrated Circuit (IC)

Use: Non-volatile Serial EEPROM Memory

Characteristics: - High-density memory storage - Serial interface for easy integration - Non-volatile data retention - Low power consumption - Wide operating voltage range

Package: W16K (SOIC-8)

Essence: The 25AA128-I/W16K is a non-volatile serial EEPROM memory IC that offers high-density storage and low power consumption. It is commonly used in various electronic devices for data storage purposes.

Packaging/Quantity: The 25AA128-I/W16K is available in a W16K package, also known as SOIC-8 (Small Outline Integrated Circuit with 8 pins). It is typically sold in reels or tubes containing multiple units.

Specifications

• Memory Size: 128 kilobits (16 kilobytes)
• Interface: Serial Peripheral Interface (SPI)
• Operating Voltage Range: 1.8V to 5.5V
• Data Retention: Up to 200 years
• Write Endurance: 1 million write cycles
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 25AA128-I/W16K has 8 pins arranged as follows:

┌───┬───┐ │ 1 │ 2 │ ├───┼───┤ │ 3 │ 4 │ ├───┼───┤ │ 5 │ 6 │ ├───┼───┤ │ 7 │ 8 │ └───┴───┘

1. Chip Select (/CS): Used to enable or disable the IC for communication.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Master Input Slave Output (MISO): Transfers data from the IC to the master device.
4. Master Output Slave Input (MOSI): Transfers data from the master device to the IC.
5. Write Protect (/WP): Allows write protection of the memory.
6. Ground (GND): Common ground reference.
7. VCC: Power supply input.
8. Hold (/HOLD): Suspends serial communication temporarily.

Functional Features

• High-density Memory Storage: The 25AA128-I/W16K offers a memory size of 128 kilobits, providing ample space for data storage.
• Serial Interface: It utilizes the Serial Peripheral Interface (SPI) for easy integration with microcontrollers and other devices.
• Non-volatile Data Retention: The IC retains data even when power is disconnected, ensuring data integrity.
• Low Power Consumption: It operates at low power levels, making it suitable for battery-powered applications.
• Wide Operating Voltage Range: The IC can operate within a voltage range of 1.8V to 5.5V, accommodating various system requirements.

Advantages and Disadvantages

Advantages: - High-density memory storage - Easy integration with SPI interface - Long data retention period - Low power consumption - Versatile operating voltage range

Disadvantages: - Limited memory size compared to higher-capacity EEPROMs - Relatively small package size may require additional space considerations

Working Principles

The 25AA128-I/W16K operates based on the principles of EEPROM (Electrically Erasable Programmable Read-Only Memory). It uses a combination of electrical signals and charge storage mechanisms to read, write, and erase data. The SPI interface facilitates communication between the IC and the controlling device, enabling seamless data transfer.

Detailed Application Field Plans

The 25AA128-I/W16K is widely used in various electronic devices and applications, including but not limited to: - 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) - Internet of Things (IoT) devices (e.g., smart home appliances, wearable devices)

Detailed and Complete Alternative Models

• 25AA256: Offers double the memory size (256 kilobits) compared to 25AA128-I/W16K.
• 25LC640A: Provides higher capacity (64 kilobytes) with a similar pin configuration.
• 24LC32A: Lower capacity (32 kilobits) alternative with compatible features.

These alternative models offer different memory capacities and may have slight variations in specifications, but they serve similar purposes and can be used as substitutes depending on specific requirements.

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