AT28C256-20DM/883-815

Product Overview

Category

AT28C256-20DM/883-815 belongs to the category of non-volatile memory devices.

Use

This product is primarily used for storing and retrieving digital information in electronic systems.

Characteristics

• Non-volatile: The stored data is retained even when power is removed.
• High capacity: The AT28C256-20DM/883-815 has a storage capacity of 256 kilobits (32 kilobytes).
• Fast access time: It operates at a speed of 200 nanoseconds, allowing for quick data retrieval.
• Low power consumption: The device is designed to minimize power usage, making it suitable for battery-powered applications.

Package

The AT28C256-20DM/883-815 comes in a Dual In-line Package (DIP), which consists of two parallel rows of pins. This package type allows for easy integration into various electronic systems.

Essence

The essence of this product lies in its ability to provide reliable and non-volatile storage for digital data, ensuring that information is preserved even in the absence of power.

Packaging/Quantity

The AT28C256-20DM/883-815 is typically packaged in tubes or trays, with each containing a specific quantity of devices. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Operating voltage: 5V
• Access time: 200 ns
• Organization: 32K x 8 bits
• Endurance: 10,000 write cycles
• Data retention: 10 years
• Operating temperature range: -40°C to +85°C

Detailed Pin Configuration

The AT28C256-20DM/883-815 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. 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. A8 - Address Input
26. A9 - Address Input
27. A10 - Address Input
28. A11 - Address Input

Functional Features

The AT28C256-20DM/883-815 offers the following functional features:

• Random access: The device allows for direct access to any memory location, enabling efficient data retrieval.
• Byte-wise programming: It supports byte-level programming, allowing for flexible and precise data storage.
• Hardware and software protection: The product includes features that protect against accidental writes or unauthorized access to stored data.

Advantages and Disadvantages

Advantages

• Non-volatile nature ensures data retention even during power loss.
• High storage capacity suitable for various applications.
• Fast access time enables quick data retrieval.
• Low power consumption extends battery life in portable devices.

Disadvantages

• Limited endurance with a maximum of 10,000 write cycles.
• Relatively higher cost compared to other memory technologies.

Working Principles

The AT28C256-20DM/883-815 utilizes electrically erasable and programmable read-only memory (EEPROM) technology. It stores data by trapping electrical charges within floating gate transistors. These charges represent binary information, which can be read or modified through specific control signals.

During a write operation, the device applies a high voltage to the control gates of selected memory cells, allowing electrons to tunnel through the insulating layer and into the floating gate. This process alters the threshold voltage of the transistor, effectively storing the desired data.

When reading data, the control signals activate the appropriate memory cells, and the stored charge is sensed to determine the logic state (0 or 1) of each bit.

Detailed Application Field Plans

The AT28C256-20DM/883-815 finds applications in various fields, including:

1. Embedded systems: The product is commonly used in microcontrollers and other embedded devices for program storage.
2. Industrial automation: It is utilized in control systems