AT45DB321C-CI

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Storage
• Characteristics:
  • Non-volatile memory
  • Serial interface
  • High storage capacity
  • Low power consumption
• Package: Chip Integration
• Essence: Flash Memory
• Packaging/Quantity: Varies depending on supplier

Specifications

• Memory Size: 32 Megabits (4 Megabytes)
• Interface: Serial Peripheral Interface (SPI)
• Operating Voltage: 2.7V to 3.6V
• Operating Temperature Range: -40°C to +85°C
• Erase/Program Time: 5ms typical, 10ms maximum
• Data Retention: 20 years
• Endurance: 100,000 erase/write cycles

Pin Configuration

The AT45DB321C-CI has a total of 28 pins. The pin configuration is as follows:

1. /CS - Chip Select
2. SCK - Serial Clock
3. SI - Serial Input
4. SO - Serial Output
5. WP - Write Protect
6. HOLD - Hold
7. VCC - Power Supply
8. GND - Ground
9. NC - No Connection
10. A0-A18 - Address Inputs
11. RESET - Reset

Functional Features

• Dual-interface: Supports both SPI and RapidS serial interface modes.
• Continuous Read Mode: Allows for sequential reading of data without the need for readdressing.
• Page Program Operation: Enables programming of up to 256 bytes in a single operation.
• Sector Erase: Provides the ability to erase large blocks of data (4KB) at once.
• Deep Power-down Mode: Reduces power consumption when the device is not in use.

Advantages and Disadvantages

Advantages: - High storage capacity - Fast erase/program time - Low power consumption - Dual-interface compatibility

Disadvantages: - Limited endurance (100,000 erase/write cycles) - Relatively high cost compared to other memory options

Working Principles

The AT45DB321C-CI is based on the NAND flash memory technology. It utilizes a floating-gate transistor structure to store data. The memory cells are organized into pages and sectors, allowing for efficient read, write, and erase operations. The device communicates with the host microcontroller through the SPI interface, enabling easy integration into various systems.

Detailed Application Field Plans

The AT45DB321C-CI is commonly used in applications that require non-volatile data storage, such as:

1. Consumer Electronics: Used in digital cameras, MP3 players, and portable gaming devices for storing user data and firmware.
2. Industrial Automation: Employed in control systems, data loggers, and sensor networks for reliable and long-term data storage.
3. Automotive: Integrated into infotainment systems, navigation units, and engine control modules for storing critical information.
4. Medical Devices: Utilized in medical equipment for storing patient data, device configurations, and firmware updates.

Alternative Models

1. AT45DB321D-CI: Similar to AT45DB321C-CI but with extended temperature range (-40°C to +105°C).
2. AT45DB641E-CI: Higher capacity variant with 64 Megabits (8 Megabytes) of memory.
3. AT45DB642D-CI: Similar to AT45DB641E-CI but with extended temperature range (-40°C to +105°C).

These alternative models offer similar functionality but may have variations in capacity, temperature range, or other specifications.

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