AT45DB021E-UUN2B-T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Storage
• Characteristics: Non-volatile, Serial Interface, Flash Memory
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: The AT45DB021E-UUN2B-T is a flash memory IC that provides non-volatile data storage capabilities. It features a serial interface, making it suitable for applications where space is limited.
• Packaging/Quantity: The AT45DB021E-UUN2B-T is typically sold in reels containing 2500 units.

Specifications

• Memory Size: 2 Megabits (256 Kilobytes)
• Interface: Serial Peripheral Interface (SPI)
• Operating Voltage: 2.7V to 3.6V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Up to 20 years
• Program/Erase Cycles: 10,000 cycles

Pin Configuration

The AT45DB021E-UUN2B-T has the following pin configuration:

1. Chip Select (/CS)
2. Output Enable (/OE)
3. Serial Clock (SCK)
4. Serial Data Input (SI)
5. Serial Data Output (SO)
6. Write Protect (/WP)
7. Reset (/RESET)
8. VCC (Power Supply)

Functional Features

• Page Program Operation: Allows individual bytes or entire pages to be programmed.
• Sector Erase Operation: Erases a sector of memory, allowing for efficient data management.
• Continuous Read Mode: Enables fast sequential reading of data from the memory.
• Software Protection: Provides write protection for specific sectors or the entire memory array.
• Deep Power-down Mode: Reduces power consumption when the device is not in use.

Advantages and Disadvantages

Advantages: - Compact size and low pin count make it suitable for space-constrained applications. - Non-volatile memory ensures data retention even during power loss. - Serial interface simplifies integration with microcontrollers and other devices. - High endurance with 10,000 program/erase cycles.

Disadvantages: - Limited storage capacity compared to larger flash memory ICs. - Slower write speeds compared to some other memory technologies. - Requires external components (such as resistors) for proper operation.

Working Principles

The AT45DB021E-UUN2B-T utilizes a floating gate transistor technology to store data. It employs a serial peripheral interface (SPI) for communication with external devices. The memory can be programmed or erased using specific commands sent through the SPI interface. Data is stored in individual pages, which can be read sequentially or randomly accessed.

Detailed Application Field Plans

The AT45DB021E-UUN2B-T is commonly used in various applications, including but not limited to:

1. Embedded Systems: Used for storing firmware, configuration data, and log files in microcontroller-based systems.
2. Consumer Electronics: Employed in devices such as digital cameras, portable media players, and set-top boxes for data storage purposes.
3. Industrial Automation: Utilized in industrial control systems, sensors, and data loggers for storing critical information.
4. Automotive Electronics: Integrated into automotive systems for storing calibration data, event logs, and firmware updates.
5. Medical Devices: Used in medical equipment for storing patient data, device settings, and software updates.

Detailed and Complete Alternative Models

1. AT45DB041E: Offers double the memory capacity (4 Megabits) compared to the AT45DB021E-UUN2B-T.
2. AT45DB081E: Provides eight times the memory capacity (8 Megabits) compared to the AT45DB021E-UUN2B-T.
3. AT45DB161E: Offers sixteen times the memory capacity (16 Megabits) compared to the AT45DB021E-UUN2B-T.

These alternative models provide increased storage capacity while maintaining similar functionality and interface compatibility.

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