AT28C256-15PI

Product Overview

Category

AT28C256-15PI belongs to the category of non-volatile memory integrated circuits.

Use

It is primarily used for storing and retrieving digital information in electronic devices.

Characteristics

• Non-volatile: Retains data even when power is turned off.
• High storage capacity: 256 kilobits (32 kilobytes) of memory.
• Fast access time: Operates at a speed of 150 nanoseconds.
• Low power consumption: Designed to minimize energy usage.
• Durable: Can withstand multiple read and write cycles without degradation.

Package

AT28C256-15PI is available in a 28-pin plastic dual in-line package (PDIP).

Essence

The essence of AT28C256-15PI lies in its ability to provide reliable and non-volatile storage for electronic devices, ensuring data integrity and accessibility.

Packaging/Quantity

This product is typically packaged in tubes or trays, with quantities varying based on customer requirements.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: 150 nanoseconds
• Supply Voltage: 4.5V - 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: 10 years minimum

Pin Configuration

The AT28C256-15PI 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. CE - Chip Enable
19. WE - Write Enable
20. I/O0 - Data Input/Output
21. I/O1 - Data Input/Output
22. I/O2 - Data Input/Output
23. I/O3 - Data Input/Output
24. I/O4 - Data Input/Output
25. I/O5 - Data Input/Output
26. I/O6 - Data Input/Output
27. I/O7 - Data Input/Output
28. Vcc - Power Supply

Functional Features

• Random Access: Allows for direct access to any memory location.
• Byte-Writable: Enables individual byte modification without affecting other data.
• Block Erase: Supports erasing of specific blocks of memory.
• Hardware and Software Protection: Provides security features to prevent unauthorized access or modification.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data retention even during power loss.
• High storage capacity suitable for various applications.
• Fast access time allows for quick retrieval of information.
• Low power consumption prolongs battery life in portable devices.
• Durable design withstands frequent read and write operations.

Disadvantages

• Limited storage capacity compared to newer memory technologies.
• Relatively slower access time compared to some modern alternatives.
• Requires additional circuitry for interfacing with microcontrollers or processors.

Working Principles

AT28C256-15PI utilizes a combination of electronic circuits and semiconductor technology to store and retrieve digital information. It employs a floating-gate transistor structure that can trap and release electrical charges, representing binary data as 0s and 1s.

The memory cells are organized into an array of rows and columns, with each cell storing a single bit of information. The address inputs select the desired memory location, while the control signals (CE, OE, WE) determine the read, write, or erase operations.

During a read operation, the selected memory cell's stored charge is sensed and amplified to provide the corresponding data output. For writing or erasing, the control signals enable the necessary voltage levels to modify the charge trapped in the floating gate.

Detailed Application Field Plans

AT28C256-15PI finds applications in various electronic devices that require non-volatile storage, such as:

1. Microcontrollers: Used for program storage and data retention.
2. Embedded Systems: Provides non-volatile memory for firmware and configuration settings.
3. Industrial Control Systems: Stores critical data and parameters for process control.
4. Automotive Electronics: Used in engine management systems, instrument clusters, etc.
5. Consumer Electronics: Enables data storage in devices like digital cameras and printers.

Detailed and Complete Alternative Models

While AT28C