AT27C256R-45TC

Product Overview

Category

AT27C256R-45TC 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 stored and cannot be modified. It is commonly used in applications where non-volatile memory is required, such as in embedded systems, microcontrollers, and other electronic devices.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C256R-45TC has a storage capacity of 256 kilobits (32 kilobytes).
• Fast access time: With a maximum access time of 45 nanoseconds, it provides quick retrieval of stored data.
• Low power consumption: The chip operates at low power levels, making it suitable for battery-powered devices.
• Durable: The AT27C256R-45TC is designed to withstand multiple read and write cycles without degradation.

Package

The AT27C256R-45TC comes in a standard 28-pin dual in-line package (DIP), which is widely used in the electronics industry.

Essence

The essence of the AT27C256R-45TC lies in its ability to provide reliable and non-volatile storage of data in various electronic applications.

Packaging/Quantity

The AT27C256R-45TC is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Storage Capacity: 256 kilobits (32 kilobytes)
• Access Time: 45 nanoseconds
• Operating Voltage: 5 volts
• Operating Temperature Range: -40°C to +85°C
• Data Retention: 10 years

Detailed Pin Configuration

The AT27C256R-45TC has a total of 28 pins, each serving a specific function. The pin configuration is as follows:

1. A0 - Address Input
2. A1 - Address Input
3. A2 - Address Input
4. A3 - Address Input
5. A4 - Address Input
6. A5 - Address Input
7. A6 - Address Input
8. A7 - Address Input
9. A8 - Address Input
10. A9 - Address Input
11. A10 - Address Input
12. A11 - Address Input
13. A12 - Address Input
14. A13 - Address Input
15. A14 - Address Input
16. A15 - Address Input
17. /OE - Output Enable
18. /CE - Chip Enable
19. /WE - Write Enable
20. VCC - Power Supply
21. D0 - Data Input/Output
22. D1 - Data Input/Output
23. D2 - Data Input/Output
24. D3 - Data Input/Output
25. D4 - Data Input/Output
26. D5 - Data Input/Output
27. D6 - Data Input/Output
28. D7 - Data Input/Output

Functional Features

The AT27C256R-45TC offers the following functional features:

• Read Operation: The chip allows for the retrieval of stored data through the address inputs and data outputs.
• Write Protection: The write enable (/WE) pin can be used to protect the stored data from accidental modification.
• Easy Integration: The chip can be easily integrated into existing electronic circuits due to its standard pin configuration and compatibility with common microcontrollers.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data integrity even during power loss.
• High storage capacity allows for the storage of a significant amount of data.
• Fast access time enables quick retrieval of stored information.
• Low power consumption makes it suitable for battery-powered devices.
• Durable design allows for multiple read and write cycles without degradation.

Disadvantages

• Data cannot be modified once programmed, limiting its flexibility compared to other memory technologies.
• Limited storage capacity compared to more advanced memory technologies.

Working Principles

The AT27C256R-45TC operates based on the principle of electrical charge trapping. During programming, the desired data is stored by applying appropriate voltage levels to specific address inputs and data lines. Once programmed, the stored data remains intact until a new programming operation is performed.

During read operations, the chip uses the address inputs to locate the desired data and outputs it through the data lines. The chip's internal circuitry ensures that the stored data is accurately retrieved and presented to the user.

Detailed Application Field Plans

The AT27C256R-45TC finds applications in various fields where non-volatile memory is required. Some of the detailed application field plans include:

1.