Microchip Technology
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AT27C256R-55PC
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AT27C256R-55PC

Product Overview

Category

AT27C256R-55PC belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used in electronic devices for storing non-volatile data that needs to be permanently stored even when power is turned off.

Characteristics

  • Non-volatile: The data stored in AT27C256R-55PC remains intact even without power.
  • Programmable: The memory can be programmed with specific data before being installed in a device.
  • Read-only: Once programmed, the data cannot be modified or erased.

Package

AT27C256R-55PC is available in a 28-pin plastic dual in-line package (PDIP).

Essence

The essence of AT27C256R-55PC lies in its ability to provide reliable and permanent storage of data in electronic devices.

Packaging/Quantity

This product is typically packaged in tubes or trays, with each containing a specified quantity of AT27C256R-55PC chips.

Specifications

  • Operating Voltage: 5V
  • Access Time: 55ns
  • Memory Size: 256 kilobits (32 kilobytes)
  • Organization: 32K x 8 bits
  • Programming Method: Parallel
  • Erase Method: Not applicable (read-only memory)

Detailed Pin Configuration

  1. A14
  2. A12
  3. A7
  4. A6
  5. A5
  6. A4
  7. A3
  8. A2
  9. A1
  10. A0
  11. /OE (Output Enable)
  12. /CE (Chip Enable)
  13. NC (No Connection)
  14. D0
  15. D1
  16. D2
  17. D3
  18. D4
  19. D5
  20. D6
  21. D7
  22. VCC (Power Supply)
  23. /PGM (Program)
  24. /BYTE (Byte/Word Organization)
  25. A8
  26. A9
  27. A11
  28. GND (Ground)

Functional Features

  • High-speed access: The AT27C256R-55PC offers fast access times, allowing for efficient data retrieval.
  • Reliable storage: The non-volatile nature of this memory chip ensures that the stored data remains intact over extended periods.
  • Easy integration: The parallel programming method simplifies the integration process into electronic devices.

Advantages and Disadvantages

Advantages

  • Permanent storage of data
  • Fast access times
  • Easy integration into electronic devices

Disadvantages

  • Inability to modify or erase programmed data
  • Limited memory size compared to other storage options

Working Principles

AT27C256R-55PC operates by storing data in a grid of memory cells. These cells can be programmed with specific data using a parallel programming method. Once programmed, the data can be accessed by enabling the chip and providing the appropriate address.

Detailed Application Field Plans

AT27C256R-55PC finds applications in various electronic devices, including but not limited to: 1. Microcontrollers 2. Embedded systems 3. Industrial control systems 4. Automotive electronics 5. Communication devices

Alternative Models

  1. AT28C256-15PU: Similar specifications with a different package type (PDIP).
  2. AT27C256R-70PU: Higher access time variant (70ns) with the same package type (PDIP).
  3. AT27C512R-45PU: Double the memory size (512 kilobits) with a similar package type (PDIP).

These alternative models provide similar functionality and can be considered as alternatives to AT27C256R-55PC based on specific requirements.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van AT27C256R-55PC in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of AT27C256R-55PC in technical solutions:

  1. Q: What is the AT27C256R-55PC? A: The AT27C256R-55PC is a 32K x 8 low-power, high-performance CMOS EPROM (Electrically Programmable Read-Only Memory) chip.

  2. Q: What is the operating voltage range for the AT27C256R-55PC? A: The operating voltage range for this chip is typically between 4.5V and 5.5V.

  3. Q: How much data can the AT27C256R-55PC store? A: This chip has a storage capacity of 256 kilobits or 32 kilobytes.

  4. Q: Can the AT27C256R-55PC be reprogrammed? A: No, this chip is not reprogrammable. Once programmed, the data remains fixed.

  5. Q: What is the programming time for the AT27C256R-55PC? A: The typical programming time for this chip is around 50 microseconds per byte.

  6. Q: Does the AT27C256R-55PC require an external power supply? A: Yes, this chip requires an external power supply within the specified voltage range.

  7. Q: What is the maximum operating frequency of the AT27C256R-55PC? A: The maximum operating frequency for this chip is 55 MHz.

  8. Q: Can the AT27C256R-55PC withstand high temperatures? A: Yes, this chip is designed to operate reliably at extended temperature ranges, typically up to 125°C.

  9. Q: What is the package type for the AT27C256R-55PC? A: The AT27C256R-55PC comes in a 28-pin PDIP (Plastic Dual In-line Package) format.

  10. Q: What are some common applications of the AT27C256R-55PC? A: This chip is commonly used in various technical solutions such as microcontrollers, embedded systems, automotive electronics, and industrial control systems where non-volatile memory storage is required.

Please note that these answers are based on general information about the AT27C256R-55PC and may vary depending on specific use cases or requirements.