AT28HC256F-12UM/883

Product Overview

Category

AT28HC256F-12UM/883 belongs to the category of high-speed, high-density Electrically Erasable Programmable Read-Only Memory (EEPROM) chips.

Use

This product is primarily used for non-volatile data storage in various electronic devices such as microcontrollers, computers, and communication systems.

Characteristics

• High-speed operation: The AT28HC256F-12UM/883 offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• High-density storage: With a capacity of 256 kilobits, this EEPROM chip can store a significant amount of data.
• Electrically erasable and programmable: The AT28HC256F-12UM/883 allows for easy modification of stored data through electrical signals, eliminating the need for physical erasure or replacement.
• Reliable and durable: This chip is designed to withstand harsh environmental conditions and has a long lifespan.

Package and Quantity

The AT28HC256F-12UM/883 is available in a ceramic package. It is typically sold in bulk quantities, with packaging options ranging from trays to tubes, depending on customer requirements.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 120 ns
• Organization: 32,768 words x 8 bits
• Endurance: 100,000 write cycles
• Data retention: 10 years
• Temperature range: -55°C to +125°C

Pin Configuration

The AT28HC256F-12UM/883 has a total of 28 pins, which are assigned specific functions. The pin configuration is as follows:

1. A0
2. A1
3. A2
4. A3
5. A4
6. A5
7. A6
8. A7
9. A8
10. A9
11. A10
12. A11
13. A12
14. A13
15. A14
16. A15
17. /OE (Output Enable)
18. /WE (Write Enable)
19. VCC (Power Supply)
20. GND (Ground)
21. DQ0
22. DQ1
23. DQ2
24. DQ3
25. DQ4
26. DQ5
27. DQ6
28. DQ7

Functional Features

• Byte-wise read and write operations: The AT28HC256F-12UM/883 allows for individual byte access, enabling efficient data manipulation.
• Hardware and software protection: This chip provides mechanisms to protect stored data from accidental modification or unauthorized access.
• Automatic page write: The device supports automatic programming of a full page of data, enhancing programming efficiency.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick access to stored data.
• Electrically erasable and programmable nature allows for easy data modification.
• Reliable and durable design ensures long-term performance.
• Hardware and software protection features enhance data security.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per bit compared to some alternative memory solutions.

Working Principles

The AT28HC256F-12UM/883 utilizes EEPROM technology, which relies on the presence or absence of an electrical charge to represent binary data. Data can be written by applying appropriate voltage levels to specific pins, and it can be read by sensing the voltage levels on the output pins.

Application Field Plans

The AT28HC256F-12UM/883 finds applications in various fields, including: 1. Microcontrollers: Used for storing firmware, configuration data, and non-volatile variables. 2. Computers: Employed in BIOS chips and other critical storage applications. 3. Communication systems: Utilized for storing network parameters, device settings, and firmware updates.

Alternative Models

Several alternative models are available that offer similar functionality to the AT28HC256F-12UM/883. Some notable alternatives include: - AT28C256 - 24LC256 - M93C86

These models differ in terms of package type, voltage requirements, and specific features, but they serve the same purpose of non-volatile data storage.

In conclusion, the AT28HC256F-12UM/883 is a high-speed, high-density EEPROM chip used for non-volatile data storage in various electronic devices. Its characteristics, functional features, and application field plans make it a reliable choice for applications requiring quick access to stored data. While it has certain limitations, there are alternative models available to suit different requirements.