AT28HC256-90FM/883

Product Overview

Category: Integrated Circuit (IC)

Use: The AT28HC256-90FM/883 is a high-speed, low-power Electrically Erasable Programmable Read-Only Memory (EEPROM) IC. It is designed to store and retrieve digital information in various electronic systems.

Characteristics: - High speed: The AT28HC256-90FM/883 operates at a fast access time of 90 nanoseconds, allowing for quick data retrieval. - Low power consumption: This IC is designed to minimize power consumption, making it suitable for battery-powered devices. - Non-volatile memory: The stored data remains intact even when the power supply is disconnected. - High capacity: The AT28HC256-90FM/883 has a storage capacity of 256 kilobits, providing ample space for storing digital information. - Extended temperature range: It can operate reliably in a wide temperature range, making it suitable for harsh environments.

Package: The AT28HC256-90FM/883 is available in a ceramic package, denoted by the "883" suffix. This package provides excellent protection against environmental factors such as moisture and temperature variations.

Essence: The essence of the AT28HC256-90FM/883 lies in its ability to provide reliable, non-volatile storage for digital information in a compact and efficient manner.

Packaging/Quantity: The AT28HC256-90FM/883 is typically sold in reels or tubes, with each reel or tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Access Time: 90 nanoseconds
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Storage Capacity: 256 kilobits
• Package Type: Ceramic (883)

Detailed Pin Configuration

The AT28HC256-90FM/883 has a total of 28 pins, each serving a specific function. The pin configuration is 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. VCC - Power Supply
20. GND - Ground
21. NC - No Connection
22. I/O4 - Data Input/Output
23. I/O5 - Data Input/Output
24. I/O6 - Data Input/Output
25. I/O7 - Data Input/Output
26. A8 - Address Input
27. A9 - Address Input
28. A11 - Address Input

Functional Features

The AT28HC256-90FM/883 offers the following functional features:

• High-speed data access: With an access time of 90 nanoseconds, it allows for quick retrieval of stored information.
• Non-volatile storage: The EEPROM technology ensures that the stored data remains intact even when the power supply is disconnected.
• Easy integration: The IC can be easily integrated into various electronic systems due to its compact size and standard pin configuration.
• Low power consumption: The AT28HC256-90FM/883 is designed to minimize power consumption, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - High-speed data access - Non-volatile storage - Compact size - Easy integration into electronic systems - Low power consumption

Disadvantages: - Limited storage capacity compared to other memory technologies - Relatively higher cost per bit of storage compared to some alternatives

Working Principles

The AT28HC256-90FM/883 utilizes EEPROM technology to store and retrieve digital information. It consists of a grid of memory cells, each capable of storing a single bit of data. These memory cells can be electrically programmed and erased, allowing for the modification of stored information.

When data needs to be stored, the appropriate address is provided to the IC's address pins along with the data to be written. The Write Enable (WE) pin is activated to allow the data to be written into the specified memory cell. Similarly, when data needs to be retrieved, the address is provided, and the