AT27C256R-55TI

Product Overview

Category

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

Use

This product is primarily used for storing data that needs to be permanently written and cannot be modified or erased. It is commonly employed in applications where non-volatile memory is required.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C256R-55TI has a capacity of 256 kilobits (32 kilobytes).
• Fast access time: With a maximum access time of 55 nanoseconds, it provides quick retrieval of stored information.
• Low power consumption: The chip operates at low power levels, making it suitable for battery-powered devices.

Package

The AT27C256R-55TI is available in a standard 28-pin dual in-line package (DIP). This package type ensures compatibility with various electronic systems.

Essence

The essence of this product lies in its ability to store data permanently, making it ideal for applications where data integrity is crucial.

Packaging/Quantity

The AT27C256R-55TI is typically packaged in reels or tubes, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer's specifications.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: Maximum 55 nanoseconds
• Supply Voltage: 5 volts
• Operating Temperature Range: -40°C to +85°C
• Package Type: 28-pin DIP

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. D7
15. D6
16. D5
17. D4
18. D3
19. D2
20. D1
21. D0
22. VCC (Power Supply)
23. /WE (Write Enable)
24. GND (Ground)
25. A8
26. A9
27. A11
28. A13

Functional Features

• Read-only memory: The AT27C256R-55TI allows for the retrieval of stored data but does not support writing or erasing operations.
• High-speed access: With a maximum access time of 55 nanoseconds, it provides quick access to stored information.
• Reliable data retention: The non-volatile nature of this chip ensures that the stored data remains intact over extended periods.

Advantages and Disadvantages

Advantages

• Permanent data storage: The AT27C256R-55TI retains data even when power is removed.
• Fast access time: The chip enables quick retrieval of stored information.
• Low power consumption: It operates at low power levels, making it suitable for battery-powered devices.

Disadvantages

• Limited functionality: This chip only supports read operations and does not allow for data modification or erasure.
• Relatively small capacity: With a capacity of 256 kilobits, it may not be sufficient for applications requiring larger storage space.

Working Principles

The AT27C256R-55TI utilizes a technology known as electrically programmable read-only memory (EPROM). It stores data using a grid of transistors that can be selectively programmed to represent binary values. Once programmed, the data remains permanently stored until the chip is replaced.

Detailed Application Field Plans

The AT27C256R-55TI finds applications in various fields, including:

1. Embedded Systems: It is commonly used in microcontrollers and other embedded systems to store firmware or boot code.
2. Automotive Electronics: The chip can be employed in automotive applications for storing critical data such as calibration values or configuration settings.
3. Industrial Control Systems: It finds use in industrial control systems where non-volatile memory is required for storing parameters or program instructions.
4. Consumer Electronics: The AT27C256R-55TI can be utilized in devices like gaming consoles, set-top boxes, or digital cameras for storing firmware or configuration data.

Detailed and Complete Alternative Models

1. AT28C256-15PU: This alternative model offers a similar capacity of 256 kilobits and operates at a maximum access time of 150 nanoseconds.
2. AT29C010A-12PC: With a capacity of 1 megabit (128 kilobytes), this alternative model provides larger storage space but operates at a slower access time of 120 nanoseconds.
3. AM29F040B