AT28HC256F-90PC

Product Overview

Category

AT28HC256F-90PC belongs to the category of high-speed, high-density 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

• High-speed operation
• High-density storage capacity
• Non-volatile memory
• Electrically erasable and programmable
• Reliable and durable

Package

AT28HC256F-90PC comes in a standard 28-pin plastic dual in-line package (PDIP).

Essence

The essence of AT28HC256F-90PC lies in its ability to provide reliable and high-speed non-volatile memory storage for electronic devices.

Packaging/Quantity

AT28HC256F-90PC is typically packaged in reels or tubes, with a quantity of 25 pieces per tube.

Specifications

• Operating Voltage: 4.5V to 5.5V
• Access Time: 90ns
• Memory Size: 256 kilobits (32 kilobytes)
• Organization: 32K x 8 bits
• Interface: Parallel
• Data Retention: 10 years
• Endurance: 100,000 write cycles

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. CE - Chip Enable
11. OE - Output 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. GND - Ground
23. A8 - Address Input
24. A9 - Address Input
25. A10 - Address Input
26. A11 - Address Input
27. A12 - Address Input
28. A13 - Address Input

Functional Features

• High-speed operation allows for quick data access and retrieval.
• High-density storage capacity enables the storage of large amounts of data in a compact chip.
• Electrically erasable and programmable feature allows for easy modification of stored data.
• Non-volatile memory ensures that data is retained even when power is disconnected.
• Reliable and durable design ensures long-term data integrity.

Advantages and Disadvantages

Advantages

• High-speed operation facilitates efficient data processing.
• High-density storage capacity meets the demands of modern electronic devices.
• Electrically erasable and programmable feature allows for flexibility in data management.
• Non-volatile memory ensures data retention without the need for constant power supply.
• Reliable and durable design guarantees long-lasting performance.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per unit compared to some alternative memory solutions.
• Requires careful handling during installation to prevent damage.

Working Principles

AT28HC256F-90PC utilizes EEPROM technology, which allows for electrically erasing and programming data. The memory cells within the chip store data as charge levels, which can be modified by applying appropriate voltage levels. The chip's control pins enable the user to address specific memory locations, read or write data, and control the chip's operation.

Detailed Application Field Plans

AT28HC256F-90PC finds applications in various fields, including: 1. Microcontrollers: Used for storing firmware, configuration data, and program code. 2. Computers: Employed in BIOS chips and other non-volatile memory requirements. 3. Consumer Electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for data storage.

Detailed and Complete Alternative Models

1. AT28C256 - Similar EEPROM chip with slower access time but lower cost.
2. AT29C256 - Flash memory chip with similar capacity and faster access time.
3. 24LC256 - I2C-compatible EEPROM chip with smaller package size and lower power consumption.

These alternative models offer different features and trade-offs, allowing users to choose based on their specific requirements.

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