AT28C256E-25UM/883

Product Overview

Category

AT28C256E-25UM/883 belongs to the category of 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 consumer electronics.

Characteristics

• Non-volatile: The stored data remains even when power is removed.
• Electrically erasable: Data can be erased and reprogrammed electronically.
• High capacity: The AT28C256E-25UM/883 has a storage capacity of 256 kilobits.
• Fast access time: It operates at a speed of 250 nanoseconds.

Package

The AT28C256E-25UM/883 comes in a 28-pin ceramic dual in-line package (DIP).

Essence

The essence of this product lies in its ability to provide reliable and non-volatile data storage in electronic systems.

Packaging/Quantity

The AT28C256E-25UM/883 is typically packaged in tubes or trays, with each containing a specific quantity of chips. The exact quantity may vary depending on the supplier.

Specifications

• Storage Capacity: 256 kilobits (32 kilobytes)
• Operating Voltage: 5V
• Access Time: 250 nanoseconds
• Endurance: 100,000 write/erase cycles
• Data Retention: 10 years
• Package Type: 28-pin ceramic DIP

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. 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. /WE - Write Enable
19. /CE - Chip 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

• High-speed operation: The AT28C256E-25UM/883 offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• Low power consumption: It is designed to minimize power consumption, making it ideal for battery-powered devices.
• Reliable data retention: The EEPROM technology used in this chip ensures long-term data retention even in harsh environmental conditions.
• Easy integration: The standard pin configuration and interface make it compatible with various electronic systems.

Advantages and Disadvantages

Advantages

• Non-volatile storage: Data remains intact even during power loss.
• Electrically erasable: Allows for easy reprogramming without the need for additional hardware.
• High capacity: Offers ample storage space for various applications.
• Fast access time: Enables quick retrieval of data.

Disadvantages

• Limited endurance: The EEPROM technology has a finite number of write/erase cycles.
• Relatively higher cost: Compared to other memory technologies, EEPROM chips can be more expensive.

Working Principles

The AT28C256E-25UM/883 utilizes the EEPROM technology, which allows for electrically erasing and reprogramming of data. It consists of a grid of memory cells that store bits of information. The stored data can be accessed by providing the appropriate address to the chip. The /OE (Output Enable) and /WE (Write Enable) pins control the read and write operations, respectively. When /OE is active low, the chip outputs the data at the specified address. On the other hand, when /WE is active low, data can be written or erased at the specified address.

Detailed Application Field Plans

The AT28C256E-25UM/883 finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration data, and calibration values.
2. Computers: Employed in BIOS chips and other non-volatile memory requirements.
3. Consumer Electronics: Utilized in devices such as set-top boxes, gaming consoles, and smart appliances for data storage.

Detailed and Complete Alternative Models

1. AT28C256-