AT28C64E-25PI

Product Overview

Category

AT28C64E-25PI belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used for non-volatile storage in various electronic devices, such as microcontrollers, computers, and consumer electronics.

Characteristics

• Electrically erasable: The AT28C64E-25PI can be erased and reprogrammed electronically, making it convenient for updating data.
• Non-volatile: The stored data remains even when power is removed.
• High capacity: This chip has a capacity of 64 kilobits, allowing for substantial data storage.
• Low power consumption: The AT28C64E-25PI operates on low power, making it suitable for battery-powered devices.

Package

The AT28C64E-25PI comes in a 28-pin dual in-line package (DIP), which is a common form factor for integrated circuits.

Essence

The essence of this product lies in its ability to store and retrieve digital information reliably and efficiently.

Packaging/Quantity

The AT28C64E-25PI is typically packaged in tubes or trays, with each containing a specific quantity of chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 250ns
• Organization: 8,192 words x 8 bits
• Endurance: 10,000 write/erase cycles
• Data retention: 10 years

Detailed Pin Configuration

The AT28C64E-25PI has a total of 28 pins, each serving a specific purpose. Here is a detailed pin configuration:

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. VCC - Power Supply
10. OE - Output Enable
11. CE - Chip Enable
12. WE - Write Enable
13. I/O0 - Data Input/Output
14. I/O1 - Data Input/Output
15. I/O2 - Data Input/Output
16. I/O3 - Data Input/Output
17. I/O4 - Data Input/Output
18. I/O5 - Data Input/Output
19. I/O6 - Data Input/Output
20. I/O7 - Data Input/Output
21. NC - No Connection
22. NC - No Connection
23. NC - No Connection
24. GND - Ground
25. NC - No Connection
26. NC - No Connection
27. NC - No Connection
28. NC - No Connection

Functional Features

The AT28C64E-25PI offers the following functional features:

• Byte-wise programmable: The chip allows individual bytes to be programmed or erased, providing flexibility in data manipulation.
• Hardware and software protection: It supports various protection mechanisms to prevent unauthorized access or accidental modification of stored data.
• High-speed operation: With a fast access time of 250ns, this EEPROM chip enables efficient data retrieval.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable, allowing for easy updates and modifications.
• Non-volatile storage ensures data retention even during power loss.
• High capacity provides ample space for storing large amounts of data.
• Low power consumption makes it suitable for battery-powered devices.

Disadvantages

• Limited endurance of 10,000 write/erase cycles may be a constraint in certain applications.
• Relatively slower access time compared to other types of memory chips.

Working Principles

The AT28C64E-25PI utilizes a combination of electronic circuits and floating gate transistors to store and retrieve data. When programming or erasing, an electric charge is applied to the floating gate, altering its electrical characteristics. This change determines whether the transistor represents a logical "0" or "1". During read operations, the stored charge is measured to determine the stored data.

Detailed Application Field Plans

The AT28C64E-25PI finds application in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration settings, and calibration data.
2. Computers: Employed in BIOS chips, expansion cards, and other storage requirements.
3. Consumer Electronics: Utilized in devices like digital cameras, smart TVs, and gaming consoles for data storage.

Detailed and Complete Alternative Models

1. AT28C64B-15PU: A similar EEPROM chip with a lower access time of 150ns. 2