AT27C256R-15JI

Product Overview

Category

AT27C256R-15JI belongs to the category of programmable read-only memory (PROM) chips.

Use

This chip is primarily used for storing data that needs to be permanently written and cannot be modified or erased. It finds applications in various electronic devices where non-volatile memory is required.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C256R-15JI has a capacity of 256 kilobits (32 kilobytes).
• Fast access time: It operates at a maximum access time of 150 nanoseconds.
• Low power consumption: The chip is designed to consume minimal power during operation.

Package

The AT27C256R-15JI is available in a 28-pin plastic dual in-line package (PDIP). This package provides easy integration into circuit boards and ensures reliable connections.

Essence

The essence of the AT27C256R-15JI lies in its ability to store data permanently, making it ideal for applications where data integrity is crucial.

Packaging/Quantity

The chip is typically sold in reels or tubes, with each reel or tube containing a specific quantity of AT27C256R-15JI chips. The exact quantity may vary depending on the supplier.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: 150 nanoseconds
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 28-pin PDIP

Detailed Pin Configuration

The AT27C256R-15JI chip has a total of 28 pins, each serving a specific purpose. Here is the detailed pin configuration:

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

Functional Features

• Permanent data storage: The AT27C256R-15JI allows for the permanent storage of data, ensuring data integrity even in the absence of power.
• High-speed access: With a maximum access time of 150 nanoseconds, this chip provides fast read operations.
• Low power consumption: The chip is designed to consume minimal power during operation, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data integrity.
• High storage capacity for various applications.
• Fast access time allows for quick data retrieval.
• Low power consumption prolongs battery life.

Disadvantages

• Inability to modify or erase stored data limits flexibility.
• Limited storage capacity compared to other memory technologies.

Working Principles

The AT27C256R-15JI operates based on the principle of electrical charge trapping. The data is programmed into the memory cells during the manufacturing process and remains permanently stored until the chip is replaced. When an address is provided, the chip retrieves the corresponding data from the memory cells and outputs it for further processing.

Detailed Application Field Plans

The AT27C256R-15JI finds applications in various fields where non-volatile memory is required. Some of the detailed application field plans include:

1. Embedded Systems: The chip can be used in embedded systems to store firmware or configuration data that needs to be retained even after power cycles.
2. Automotive Electronics: It can be utilized in automotive electronics for storing critical data such as calibration values or system parameters.
3. Industrial Control Systems: The chip can be employed in industrial control systems to store program code or configuration settings.
4. Medical Devices: It finds use in medical devices for storing patient data or device-specific information.

Detailed and Complete Alternative Models

1. AT28C256: This is