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AT27C256R-90PC
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AT27C256R-90PC

Product Overview

Category

The AT27C256R-90PC belongs to the category of programmable read-only memory (PROM) chips.

Use

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

Characteristics

  • Non-volatile memory
  • High-speed access
  • Low power consumption
  • Durable and reliable
  • Wide operating voltage range

Package

The AT27C256R-90PC is typically available in a dual in-line package (DIP) with 28 pins.

Essence

The essence of the AT27C256R-90PC 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.

Specifications

  • Capacity: 256 kilobits (32K x 8)
  • Access Time: 90 nanoseconds
  • Operating Voltage: 4.5V to 5.5V
  • Operating Temperature: -40°C to 125°C
  • Endurance: 100,000 write cycles

Detailed Pin Configuration

The detailed pin configuration of the AT27C256R-90PC is as follows: 1. A16 2. A15 3. A12 4. A7 5. A6 6. A5 7. A4 8. A3 9. A2 10. A1 11. A0 12. E (Chip Enable) 13. O0 14. O1 15. O2 16. O3 17. O4 18. O5 19. O6 20. O7 21. Vcc (+5V) 22. CE (Output Enable) 23. OE (Output Enable) 24. WE (Write Enable) 25. A8 26. A9 27. A11 28. GND (Ground)

Functional Features

The AT27C256R-90PC offers the following functional features: - Random access for reading - Output enable control - Write enable control - Chip enable control - High-speed operation

Advantages and Disadvantages

Advantages

  • Non-volatile storage
  • Fast access time
  • Low power consumption
  • Wide operating temperature range

Disadvantages

  • Inability to be reprogrammed
  • Limited endurance for write cycles

Working Principles

The AT27C256R-90PC operates based on the principle of electrical signals controlling the flow of data into and out of its memory cells. When the chip enable, output enable, and write enable signals are appropriately set, the device allows for reading and writing operations.

Detailed Application Field Plans

The AT27C256R-90PC is widely used in various applications, including: - Automotive electronics - Industrial control systems - Consumer electronics - Medical devices - Communication equipment

Detailed and Complete Alternative Models

Some alternative models to the AT27C256R-90PC include: - AT28C256 - AM27C256 - M27C256B

In conclusion, the AT27C256R-90PC is a versatile PROM chip that offers fast and reliable non-volatile memory storage, making it suitable for a wide range of electronic applications.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací AT27C256R-90PC v technických řešeních

  1. What is the AT27C256R-90PC?

    • The AT27C256R-90PC is a 256K (32K x 8) one-time programmable read-only memory (OTP EPROM) chip with a speed grade of 90 nanoseconds.

  2. What are the typical applications of the AT27C256R-90PC?

    • Common applications include storing firmware, boot code, and configuration data in embedded systems, microcontrollers, and other electronic devices.

  3. What voltage does the AT27C256R-90PC operate at?

    • The AT27C256R-90PC operates at a standard voltage range of 4.5V to 5.5V.

  4. How do I program the AT27C256R-90PC?

    • The AT27C256R-90PC is programmed using a conventional EPROM programmer that supplies the necessary programming voltage and control signals.

  5. Can the AT27C256R-90PC be reprogrammed?

    • No, the AT27C256R-90PC is a one-time programmable device and cannot be reprogrammed after initial programming.

  6. What is the storage capacity of the AT27C256R-90PC?

    • The AT27C256R-90PC has a storage capacity of 256 kilobits, organized as 32 kilobytes of data.

  7. What is the operating temperature range of the AT27C256R-90PC?

    • The AT27C256R-90PC is designed to operate within a temperature range of -40°C to 85°C.

  8. Does the AT27C256R-90PC require an external power supply for operation?

    • Yes, the AT27C256R-90PC requires an external power supply within the specified voltage range for proper operation.

  9. What are the pinout and package type of the AT27C256R-90PC?

    • The AT27C256R-90PC is available in a 28-pin PDIP (Plastic Dual In-line Package) with a specific pinout for addressing, data input/output, and control signals.

  10. Is the AT27C256R-90PC compatible with standard microcontroller interfaces?

    • Yes, the AT27C256R-90PC is designed to be compatible with common microcontroller and system bus interfaces, making it easy to integrate into various technical solutions.