Microchip Technology
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AT27C256R-90JI
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AT27C256R-90JI

Product Overview

Category

The AT27C256R-90JI belongs to the category of electrically erasable programmable read-only memory (EEPROM).

Use

It is used for storing and retrieving data in electronic devices, such as microcontrollers, computers, and other digital systems.

Characteristics

  • Non-volatile memory
  • Electrically erasable and reprogrammable
  • High reliability and endurance
  • Low power consumption

Package

The AT27C256R-90JI is typically available in a 28-pin dual in-line package (DIP) or a surface-mount package.

Essence

The essence of the AT27C256R-90JI lies in its ability to retain stored data even when the power is turned off.

Packaging/Quantity

It is commonly packaged in tubes or trays and is available in various quantities depending on the manufacturer's specifications.

Specifications

  • Capacity: 256 kilobits
  • Access Time: 90 nanoseconds
  • Operating Voltage: 5V
  • Operating Temperature: -40°C to 125°C
  • Endurance: 10,000 erase/write cycles

Detailed Pin Configuration

The AT27C256R-90JI has a standard 28-pin configuration with specific pins dedicated to address lines, data input/output, control signals, and power supply connections.

Functional Features

  • Byte-wide access for easy interfacing
  • Fast access time for efficient data retrieval
  • Low power consumption for energy efficiency
  • Built-in protection against accidental write operations

Advantages

  • Non-volatile storage ensures data retention without power
  • Electrically erasable and reprogrammable for flexibility
  • High reliability and endurance for long-term use
  • Compatibility with various electronic systems

Disadvantages

  • Limited erase/write cycles compared to some newer memory technologies
  • Relatively slower access times compared to certain modern memory solutions

Working Principles

The AT27C256R-90JI operates by using electrical signals to program and erase memory cells within the device. When data is written or erased, the electrical charge on specific memory cells is altered, allowing for the storage and modification of information.

Detailed Application Field Plans

The AT27C256R-90JI is commonly used in applications such as: - Embedded systems - Industrial control systems - Automotive electronics - Consumer electronics - Communication devices

Detailed and Complete Alternative Models

Some alternative models to the AT27C256R-90JI include: - AT28C256 - 27C256 - 29C256 - SST27SF256

In conclusion, the AT27C256R-90JI is a reliable and versatile EEPROM that finds widespread use in various electronic applications due to its non-volatile nature, reprogrammability, and compatibility with different systems.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van AT27C256R-90JI in technische oplossingen

  1. What is the AT27C256R-90JI?

    • The AT27C256R-90JI is a 256K (32K x 8) one-time programmable read-only memory (OTP EPROM) chip.

  2. What are the key features of the AT27C256R-90JI?

    • The key features include a 90ns access time, low power consumption, and a wide operating voltage range.

  3. How is the AT27C256R-90JI typically used in technical solutions?

    • It is commonly used for storing firmware, configuration data, and other fixed data in embedded systems and electronic devices.

  4. What are the programming considerations for the AT27C256R-90JI?

    • The AT27C256R-90JI is a one-time programmable device, meaning that its contents can only be programmed once using specialized programming equipment.

  5. What are the typical applications of the AT27C256R-90JI?

    • It is often used in industrial control systems, automotive electronics, consumer electronics, and various other embedded systems.

  6. What are the advantages of using the AT27C256R-90JI in technical solutions?

    • Its non-volatile nature, fast access time, and low power consumption make it suitable for applications requiring reliable and fast access to fixed data.

  7. Are there any limitations or considerations when using the AT27C256R-90JI?

    • One limitation is that it can only be programmed once, so careful consideration must be given to the data being programmed onto the chip.

  8. What are the environmental and reliability specifications of the AT27C256R-90JI?

    • It typically operates within a specified temperature range and has a minimum data retention period, making it suitable for various environmental conditions.

  9. Can the AT27C256R-90JI be replaced with other memory devices in certain applications?

    • Depending on the specific requirements of the application, alternatives such as EEPROMs or flash memories may be considered as replacements.

  10. Where can I find detailed technical information and datasheets for the AT27C256R-90JI?

    • Detailed technical information and datasheets for the AT27C256R-90JI can be found on the manufacturer's website or through authorized distributors.