AT28HC256-90SC

Product Overview

Category

AT28HC256-90SC belongs to the category of high-speed, high-capacity EEPROM (Electrically Erasable Programmable Read-Only Memory) chips.

Use

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

Characteristics

• High-speed operation: The AT28HC256-90SC offers fast read and write speeds, making it suitable for applications that require quick access to stored data.
• High capacity: With a storage capacity of 256 kilobits, this chip provides ample space for storing large amounts of data.
• Low power consumption: The AT28HC256-90SC is designed to operate efficiently with minimal power consumption, making it ideal for battery-powered devices.
• Reliable data retention: This EEPROM chip ensures data integrity even in harsh environmental conditions, thanks to its robust design and advanced error correction techniques.

Package

The AT28HC256-90SC comes in a small outline integrated circuit (SOIC) package, which provides ease of integration into various electronic systems.

Essence

The essence of the AT28HC256-90SC lies in its ability to provide high-speed, high-capacity non-volatile data storage in a compact form factor.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of AT28HC256-90SC chips. The exact packaging and quantity may vary depending on the manufacturer's specifications.

Specifications

• Operating voltage: 2.7V to 5.5V
• Maximum clock frequency: 20 MHz
• Access time: 90 ns
• Organization: 32,768 words x 8 bits
• Endurance: 100,000 write cycles
• Data retention: 10 years

Detailed Pin Configuration

The AT28HC256-90SC 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. /WE - Write Enable
19. /CE - Chip Enable
20. VCC - Power Supply
21. GND - Ground
22. DQ0 - Data Input/Output
23. DQ1 - Data Input/Output
24. DQ2 - Data Input/Output
25. DQ3 - Data Input/Output
26. DQ4 - Data Input/Output
27. DQ5 - Data Input/Output
28. DQ6 - Data Input/Output

Functional Features

• High-speed operation allows for quick access to stored data.
• Non-volatile memory ensures data retention even when power is disconnected.
• Low power consumption makes it suitable for battery-powered devices.
• Advanced error correction techniques enhance data reliability.
• Wide operating voltage range provides flexibility in various applications.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data access.
• Large storage capacity accommodates extensive data requirements.
• Low power consumption prolongs battery life.
• Robust design ensures reliable data retention.
• Versatile operating voltage range allows for compatibility with different systems.

Disadvantages

• Limited endurance of 100,000 write cycles may be a constraint in certain applications.
• Relatively higher cost compared to lower-capacity EEPROM chips.
• The small form factor may require additional measures for ease of handling during assembly.

Working Principles

The AT28HC256-90SC operates based on the principles of EEPROM technology. It utilizes electrically controlled floating gate transistors to store and retrieve data. When data is written, an electrical charge is trapped in the floating gate, altering the transistor's behavior. This change can be detected during read operations, allowing the retrieval of stored information.

Detailed Application Field Plans

The AT28HC256-90SC finds application in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration settings, and calibration data.
2. Computers: Employed in BIOS (Basic Input/Output System) chips for non-volatile storage of system parameters.
3. Consumer Electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for data