Microchip Technology
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AT28HC256F-90TU
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AT28HC256F-90TU

Product Overview

Category

AT28HC256F-90TU belongs to the category of high-speed, low-power Electrically Erasable Programmable Read-Only Memory (EEPROM) chips.

Use

This product is primarily used for non-volatile storage of data in various electronic devices such as microcontrollers, computers, and consumer electronics.

Characteristics

  • High-speed operation
  • Low power consumption
  • Non-volatile memory
  • Large storage capacity
  • Reliable data retention
  • Easy to interface with other electronic components

Package

AT28HC256F-90TU is available in a small form factor package, making it suitable for space-constrained applications. The specific package type may vary depending on the manufacturer.

Essence

The essence of AT28HC256F-90TU lies in its ability to provide reliable and non-volatile storage of data, ensuring that critical information is retained even when power is disconnected.

Packaging/Quantity

AT28HC256F-90TU is typically sold in reels or trays, containing a specific quantity of chips per package. The exact packaging and quantity may vary based on the manufacturer's specifications.

Specifications

  • Operating Voltage: 2.7V - 5.5V
  • Storage Capacity: 256 kilobits (32 kilobytes)
  • Access Time: 90 nanoseconds
  • Interface: Serial Peripheral Interface (SPI)
  • Data Retention: Up to 10 years
  • Endurance: 100,000 write cycles

Detailed Pin Configuration

The AT28HC256F-90TU chip has a standard pin configuration consisting of the following pins:

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

Functional Features

  • High-speed data transfer using the Serial Peripheral Interface (SPI) protocol.
  • Flexible write and erase operations, allowing for easy modification of stored data.
  • Low power consumption during both active and standby modes.
  • Hardware and software protection mechanisms to prevent unauthorized access or accidental modifications.

Advantages and Disadvantages

Advantages

  • Fast access time enables quick retrieval of stored data.
  • Non-volatile memory ensures data retention even in the absence of power.
  • Low power consumption prolongs battery life in portable devices.
  • Easy integration with other electronic components due to standard interface protocols.

Disadvantages

  • Limited storage capacity compared to other memory technologies.
  • Relatively higher cost per unit compared to alternative memory solutions.
  • Limited endurance may restrict the number of write cycles.

Working Principles

AT28HC256F-90TU utilizes EEPROM technology, which allows for electrically erasing and reprogramming of data. The chip stores information in a grid of memory cells, each capable of holding a single bit. When data needs to be written or modified, the appropriate voltage levels are applied to specific memory cells, altering their state. During read operations, the stored data is retrieved by sensing the voltage levels within the memory cells.

Detailed Application Field Plans

AT28HC256F-90TU finds applications in various fields, including:

  1. Microcontrollers: Used for storing firmware, configuration settings, and calibration data.
  2. Computers: Employed in BIOS chips, expansion cards, and embedded systems.
  3. Consumer Electronics: Utilized in smart TVs, set-top boxes, and gaming consoles for data storage and firmware updates.
  4. Automotive: Integrated into electronic control units (ECUs) for storing critical vehicle parameters and sensor data.

Detailed and Complete Alternative Models

  1. AT28C256: Similar to AT28HC256F-90TU, but with a slower access time of 150 nanoseconds.
  2. AT24C256: I2C-compatible EEPROM chip with the same storage capacity and similar characteristics.

These alternative models provide options for different performance requirements or compatibility with specific interface protocols.

In conclusion, AT28HC256F-90TU is a high-speed, low-power EEPROM chip that offers reliable non-volatile data storage. Its compact package, flexible functionality, and wide range of applications make it a popular choice in the electronics industry.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van AT28HC256F-90TU in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of AT28HC256F-90TU in technical solutions:

  1. Q: What is the AT28HC256F-90TU? A: The AT28HC256F-90TU is a high-speed, low-power CMOS 256K (32K x 8) EEPROM memory chip.

  2. Q: What are some typical applications for the AT28HC256F-90TU? A: The AT28HC256F-90TU is commonly used in embedded systems, microcontrollers, automotive electronics, industrial control systems, and other applications that require non-volatile memory storage.

  3. Q: What is the operating voltage range of the AT28HC256F-90TU? A: The AT28HC256F-90TU operates within a voltage range of 4.5V to 5.5V.

  4. Q: What is the maximum clock frequency supported by the AT28HC256F-90TU? A: The AT28HC256F-90TU supports a maximum clock frequency of 90 MHz.

  5. Q: How much data can be stored in the AT28HC256F-90TU? A: The AT28HC256F-90TU has a capacity of 256 kilobits, which is equivalent to 32 kilobytes or 262,144 bytes.

  6. Q: Does the AT28HC256F-90TU support byte-level read and write operations? A: Yes, the AT28HC256F-90TU supports byte-level random read and write operations.

  7. Q: Can the AT28HC256F-90TU be reprogrammed multiple times? A: Yes, the AT28HC256F-90TU is electrically erasable and can be reprogrammed multiple times.

  8. Q: What is the endurance of the AT28HC256F-90TU? A: The AT28HC256F-90TU has an endurance of at least 100,000 write cycles.

  9. Q: Does the AT28HC256F-90TU have any built-in security features? A: Yes, the AT28HC256F-90TU supports software and hardware data protection mechanisms to prevent unauthorized access.

  10. Q: Is the AT28HC256F-90TU RoHS compliant? A: Yes, the AT28HC256F-90TU is RoHS (Restriction of Hazardous Substances) compliant, ensuring it meets environmental standards.

Please note that these answers are based on general information about the AT28HC256F-90TU and may vary depending on specific implementation details and datasheet specifications.