AT28C256-15PU

Product Overview

Category

AT28C256-15PU belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used for non-volatile data storage in various electronic devices, such as microcontrollers, computers, and consumer electronics.

Characteristics

• Non-volatile: The stored data remains even when power is removed.
• Electrically erasable: The memory can be erased and reprogrammed electronically.
• High capacity: The AT28C256-15PU has a capacity of 256 kilobits (32 kilobytes).
• Low power consumption: It operates at low voltage and consumes minimal power.
• Fast access time: The chip has a maximum access time of 150 nanoseconds.

Package

The AT28C256-15PU comes in a plastic DIP (Dual In-line Package) with 28 pins.

Essence

The essence of this product lies in its ability to store and retrieve digital information reliably and efficiently.

Packaging/Quantity

The AT28C256-15PU is typically packaged in tubes or trays, with each package containing a specified quantity of chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

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

Pin Configuration

The AT28C256-15PU 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. 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: The AT28C256-15PU allows random access to any memory location, enabling efficient data retrieval.
• High-Speed Operation: With a maximum access time of 150 nanoseconds, this chip ensures fast read and write operations.
• Low Power Consumption: The product operates at low voltage and consumes minimal power, making it suitable for battery-powered devices.
• Data Protection: It features a write protection mechanism to prevent accidental modification or erasure of stored data.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data retention even during power loss.
• Electrically erasable and reprogrammable, allowing flexibility in data storage.
• High capacity enables storage of large amounts of information.
• Fast access time facilitates quick data retrieval.
• Low power consumption prolongs battery life in portable devices.

Disadvantages

• Limited endurance: The EEPROM has a limited number of erase/write cycles before it may become unreliable.
• Relatively higher cost compared to other types of memory.

Working Principles

The AT28C256-15PU utilizes a floating-gate transistor structure to store data. It employs a combination of electric fields and charge trapping to represent binary information as electrical charges. When a specific voltage is applied, the trapped charges can be manipulated to either store or erase data.

Detailed Application Field Plans

The AT28C256-15PU finds applications in various fields, including: 1. Embedded Systems: Used for firmware storage in microcontrollers and embedded systems. 2. Computer Memory Expansion: Provides additional non-volatile storage capacity for computers. 3. Consumer Electronics: Used in devices like digital cameras, printers, and set-top boxes for data storage. 4. Automotive Electronics: Utilized in automotive systems for storing calibration data, firmware, and configuration settings.

Detailed and Complete Alternative Models

1. AT28C64B-15PU: 64 kilobit (8