AT28HC256-90LM/883

Product Overview

Category

AT28HC256-90LM/883 belongs to the category of high-speed, high-capacity electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is primarily used for storing and retrieving data in electronic devices. It provides non-volatile memory storage that can be electrically erased and reprogrammed.

Characteristics

• High speed: The AT28HC256-90LM/883 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 EEPROM chip can accommodate a significant amount of data.
• Electrically erasable: Unlike traditional ROM chips, the AT28HC256-90LM/883 can be erased and reprogrammed without the need for UV light exposure or physical removal from the device.
• Low power consumption: This chip is designed to operate efficiently with minimal power requirements.
• Durable: The AT28HC256-90LM/883 is built to withstand harsh environmental conditions, making it suitable for use in rugged applications.
• Extended temperature range: It can operate reliably within a wide temperature range, making it suitable for both commercial and industrial applications.

Package and Quantity

The AT28HC256-90LM/883 is available in a ceramic package, denoted by the "LM" suffix. It is supplied in a quantity of one unit per package.

Specifications

• Part Number: AT28HC256-90LM/883
• Memory Type: Electrically Erasable Programmable Read-Only Memory (EEPROM)
• Capacity: 256 kilobits (32 kilobytes)
• Access Time: 90 nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: Ceramic
• Package Pin Count: 28

Detailed Pin Configuration

The AT28HC256-90LM/883 has a total of 28 pins, which are assigned specific functions as follows:

1. A16 - Address Input
2. A15 - Address Input
3. A12 - Address Input
4. A7 - Address Input
5. A6 - Address Input
6. A5 - Address Input
7. A4 - Address Input
8. A3 - Address Input
9. A2 - Address Input
10. A1 - Address Input
11. A0 - Address Input
12. CE - Chip Enable Input
13. OE - Output Enable Input
14. WE - Write Enable Input
15. I/O0 - Data Input/Output
16. I/O1 - Data Input/Output
17. I/O2 - Data Input/Output
18. I/O3 - Data Input/Output
19. I/O4 - Data Input/Output
20. I/O5 - Data Input/Output
21. I/O6 - Data Input/Output
22. I/O7 - Data Input/Output
23. VCC - Power Supply
24. GND - Ground
25. NC - No Connection
26. A8 - Address Input
27. A9 - Address Input
28. A11 - Address Input

Functional Features

• High-speed operation allows for quick data access and retrieval.
• Electrically erasable memory enables easy reprogramming without the need for specialized equipment.
• Low power consumption ensures efficient use of energy resources.
• Durable construction makes it suitable for use in demanding environments.
• Wide operating temperature range allows for reliable performance in various conditions.

Advantages and Disadvantages

Advantages

• Fast read and write operations
• High storage capacity
• Easy reprogramming without physical removal
• Low power consumption
• Suitable for rugged applications
• Wide operating temperature range

Disadvantages

• Limited compatibility with certain devices or systems
• Relatively higher cost compared to other memory options
• Requires careful handling to prevent damage during installation or removal

Working Principles

The AT28HC256-90LM/883 operates based on the principles of EEPROM technology. It utilizes a grid of floating-gate transistors to store and retrieve data. When data is written, an electrical charge is applied to specific cells within the memory array, altering their state. To read the stored data, the charge level of each cell is measured, allowing the retrieval of the stored information.

Detailed Application Field Plans

The AT28HC256-90LM/883 finds application in various fields, including but not limited to:

1. Embedded Systems: Used for storing firmware, configuration data, and critical system parameters.
2. Automotive Electronics: Employed in engine control units, infotainment systems, and other automotive electronics that require non-volatile memory storage.