AT28HC256-90PC

Product Overview

Category

AT28HC256-90PC 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: The AT28HC256-90PC offers fast read and write operations, making it suitable for applications requiring 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.
• Non-volatile memory: The EEPROM technology ensures that the stored data remains intact even when power is removed.
• Low power consumption: The AT28HC256-90PC is designed to operate efficiently with minimal power requirements.
• Durable: This chip is built to withstand harsh environmental conditions and has a long lifespan.

Package

The AT28HC256-90PC comes in a standard dual in-line package (DIP), which consists of a rectangular plastic body with two parallel rows of pins.

Essence

The essence of the AT28HC256-90PC lies in its ability to provide reliable and high-speed non-volatile data storage in electronic devices.

Packaging/Quantity

This product is typically packaged in tubes or trays, with each tube or tray containing a specific quantity of chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Manufacturer: Atmel Corporation
• Part Number: AT28HC256-90PC
• Memory Type: EEPROM
• Capacity: 256 kilobits
• Operating Voltage: 2.7V - 5.5V
• Speed: 90 nanoseconds (access time)
• Interface: Parallel
• Package Type: DIP
• Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The AT28HC256-90PC chip has a total of 28 pins, which are assigned specific functions. 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. VSS: Ground
21. DQ0: Data Input/Output
22. DQ1: Data Input/Output
23. DQ2: Data Input/Output
24. DQ3: Data Input/Output
25. DQ4: Data Input/Output
26. DQ5: Data Input/Output
27. DQ6: Data Input/Output
28. DQ7: Data Input/Output

Functional Features

• High-speed access: The AT28HC256-90PC offers fast read and write operations, allowing for quick retrieval and modification of stored data.
• Non-volatile memory: The EEPROM technology ensures that the data remains intact even when power is removed, making it suitable for applications requiring persistent storage.
• Easy integration: This chip can be easily integrated into existing electronic systems due to its standard pin configuration and interface.
• Low power consumption: The AT28HC256-90PC is designed to operate efficiently with minimal power requirements, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• High-speed access allows for quick data retrieval and modification.
• Non-volatile memory ensures data integrity even during power loss.
• Easy integration into existing electronic systems.
• Low power consumption extends battery life in portable devices.

Disadvantages

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

Working Principles

The AT28HC256-90PC utilizes EEPROM technology to store and retrieve data. It consists of a grid of memory cells that can be individually programmed or erased electrically. When data needs to be stored, the chip applies an electrical charge to specific memory cells, altering their state. To read the stored data, the chip measures the electrical characteristics of each memory cell. This process allows for non-volatile data storage and retrieval.

Detailed Application Field Plans

The AT28HC256-90PC finds applications in various fields where non-v