AT45D021-TC

Product Overview

Category: Integrated Circuit (IC)

Use: Data Storage

Characteristics: - Non-volatile memory - Serial interface - High-speed data transfer - Low power consumption

Package: Thin Small Outline Package (TSOP)

Essence: The AT45D021-TC is a non-volatile memory IC that provides high-speed data storage and retrieval capabilities. It is commonly used in various electronic devices for storing critical data.

Packaging/Quantity: The AT45D021-TC is typically packaged in a Thin Small Outline Package (TSOP) and is available in different quantities depending on the manufacturer's specifications.

Specifications

The AT45D021-TC has the following specifications:

• Memory Capacity: 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
• Write Endurance: 10,000 cycles

Pin Configuration

The AT45D021-TC has a total of 8 pins, which are assigned specific functions as follows:

1. Chip Select (/CS): Enables or disables the device for communication.
2. Output Enable (/OE): Controls the output buffer.
3. Serial Clock (SCK): Provides the clock signal for data transfer.
4. Serial Data Input (SI): Receives data from the microcontroller.
5. Serial Data Output (SO): Transmits data to the microcontroller.
6. Write Protect (/WP): Protects the memory from accidental writes.
7. VCC: Power supply voltage.
8. Ground (GND): Common ground reference.

Functional Features

The AT45D021-TC offers the following functional features:

• High-speed data transfer: The serial interface allows for fast and efficient data transfer between the IC and the microcontroller.
• Non-volatile memory: The stored data is retained even when power is disconnected, ensuring data integrity.
• Low power consumption: The IC operates at low power levels, making it suitable for battery-powered devices.
• Write protection: The write protect pin prevents accidental modification of stored data.

Advantages and Disadvantages

Advantages: - High-speed data transfer enables quick access to stored information. - Non-volatile memory ensures data retention even during power loss. - Low power consumption prolongs battery life in portable devices. - Write protection feature prevents accidental data modification.

Disadvantages: - Limited storage capacity compared to other memory options. - Serial interface may require additional circuitry for compatibility with certain microcontrollers. - Relatively higher cost compared to some alternative memory solutions.

Working Principles

The AT45D021-TC utilizes flash memory technology to store and retrieve data. It employs a serial interface, allowing for efficient communication with a microcontroller. When data needs to be stored, the microcontroller sends the information through the serial input pin (SI) and clock signal (SCK). The IC then stores the data in its non-volatile memory cells. To retrieve the stored data, the microcontroller sends read commands, and the IC transmits the requested data through the serial output pin (SO).

Detailed Application Field Plans

The AT45D021-TC finds applications in various electronic devices that require reliable and non-volatile data storage. Some common application fields include:

1. Consumer Electronics: Used in digital cameras, MP3 players, and handheld gaming devices for storing user data, firmware, and configuration settings.
2. Industrial Automation: Employed in programmable logic controllers (PLCs) and industrial control systems for storing critical process data and program code.
3. Automotive Electronics: Utilized in car navigation systems, infotainment systems, and engine control units (ECUs) for storing maps, multimedia data, and firmware.
4. Medical Devices: Integrated into medical equipment such as patient monitors and diagnostic devices to store patient data and device configurations.

Detailed and Complete Alternative Models

1. AT45DB021D-SSU: Similar to the AT45D021-TC, this model offers 2 Megabits of non-volatile memory with a serial interface. It comes in a Small-Outline IC (SOIC) package.
2. W25Q16JVSSIQ: This alternative model provides 16 Megabits of flash memory with a quad SPI interface. It operates at a wider voltage range and is available in a Very Small Outline Package (VSOP).
3. MX25L12835FZNI-10G: With a capacity of 128 Megabits, this model offers significantly higher storage space. It features a standard SPI interface and operates at a wider temperature range. It comes in a Ball Grid Array (BGA) package.

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