Encyclopedia Entry: 25AA02E48T-I/SN

Product Overview

Category: Integrated Circuit (IC)

Use: Non-volatile Memory

Characteristics: The 25AA02E48T-I/SN is a small-sized, low-power, and high-performance non-volatile memory IC. It is designed to store and retrieve data even when the power supply is disconnected.

Package: The 25AA02E48T-I/SN is available in an 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence: This IC is essential for applications that require reliable and persistent data storage, such as microcontrollers, embedded systems, and various electronic devices.

Packaging/Quantity: The 25AA02E48T-I/SN is typically sold in reels containing 2500 units per reel.

Specifications

• Memory Size: 2 Kbits (256 bytes)
• Interface: Serial Peripheral Interface (SPI)
• Supply Voltage: 1.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Up to 200 years
• Write Endurance: 1,000,000 cycles

Detailed Pin Configuration

The 25AA02E48T-I/SN has eight pins, each serving a specific purpose:

1. Chip Select (/CS): Enables communication with the IC when set to a low logic level.
2. Serial Clock (SCK): Provides the clock signal for synchronous data transfer.
3. Serial Data Input (SI): Transfers data from the microcontroller to the IC.
4. Serial Data Output (SO): Transfers data from the IC to the microcontroller.
5. Write Protect (/WP): When set to a low logic level, prevents write operations.
6. VCC: Power supply input (+1.7V to +5.5V).
7. Ground (GND): Common ground reference.
8. Hold (/HOLD): Suspends ongoing operations when set to a low logic level.

Functional Features

• Non-volatile Storage: Retains data even without power supply.
• High-Speed Performance: Supports fast read and write operations.
• Low Power Consumption: Ideal for battery-powered devices.
• Write Protection: Ensures data integrity by preventing accidental writes.
• SPI Interface: Allows easy integration with microcontrollers and other devices.

Advantages and Disadvantages

Advantages: - Compact size and low power consumption make it suitable for portable devices. - High-speed performance enables quick data access. - Long data retention period ensures data integrity over extended periods. - Write protection feature prevents unauthorized modifications.

Disadvantages: - Limited storage capacity (2 Kbits) may not be sufficient for certain applications. - Requires an external microcontroller or device for data transfer and control.

Working Principles

The 25AA02E48T-I/SN utilizes the Serial Peripheral Interface (SPI) protocol to communicate with a microcontroller or host device. It employs a floating gate technology that allows data to be stored in non-volatile memory cells. The IC uses a combination of electrical charges to represent binary data, which can be read or written through the SPI interface.

Detailed Application Field Plans

The 25AA02E48T-I/SN finds application in various fields, including:

1. Microcontrollers: Used as a storage medium for program code, configuration settings, and data logging.
2. Embedded Systems: Provides non-volatile memory for critical system parameters and firmware updates.
3. Consumer Electronics: Enables persistent storage of user preferences, calibration data, and device settings.
4. Industrial Automation: Stores configuration data, sensor calibration values, and event logs.
5. Automotive Electronics: Utilized for storing vehicle-specific data, such as mileage, error codes, and user preferences.

Detailed and Complete Alternative Models

1. 25AA02E48T-I/OT: Similar to the 25AA02E48T-I/SN but available in an SOT-23 package.
2. 25AA02E48T-I/MF: Offers the same functionality but comes in a DFN (Dual Flat No-leads) package.
3. 25AA02E48T-I/MS: Surface mount version of the IC, available in a small MSOP (Mini Small Outline Package).

These alternative models provide similar features and performance characteristics, allowing users to choose the most suitable option based on their specific requirements.

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