AT28HC256E-12JI

Product Overview

Category

AT28HC256E-12JI belongs to the category of high-speed, low-power 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: The AT28HC256E-12JI offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• Low power consumption: This EEPROM chip is designed to minimize power consumption, making it ideal for battery-powered devices.
• Large storage capacity: With a capacity of 256 kilobits, the AT28HC256E-12JI provides ample space for storing critical data.
• Extended temperature range: It can operate reliably within a wide temperature range, making it suitable for both industrial and consumer applications.

Package and Quantity

The AT28HC256E-12JI is available in a 32-pin plastic J-leaded chip carrier (PLCC) package. It is typically sold in reels containing multiple units.

Specifications

• Organization: 32K x 8 bits
• Supply voltage: 2.7V to 5.5V
• Access time: 120 ns
• Standby current: 100 µA (max)
• Operating temperature range: -40°C to +85°C
• Data retention: 10 years (minimum)

Pin Configuration

The AT28HC256E-12JI has a total of 32 pins, which are assigned specific functions. Here is the detailed pin configuration:

1. A16
2. A15
3. A14
4. A13
5. A12
6. A11
7. A10
8. A9
9. A8
10. VCC
11. OE#
12. CE#
13. WE#
14. I/O0
15. I/O1
16. I/O2
17. I/O3
18. I/O4
19. I/O5
20. I/O6
21. I/O7
22. NC
23. GND
24. NC
25. NC
26. NC
27. NC
28. NC
29. NC
30. NC
31. NC
32. NC

Functional Features

• High-speed operation: The AT28HC256E-12JI offers fast read and write cycles, allowing for efficient data access.
• Low power consumption: It consumes minimal power during both active and standby modes, prolonging battery life in portable devices.
• Hardware and software protection: This EEPROM chip provides various mechanisms to protect stored data from unauthorized access or accidental modification.
• Reliable data retention: The AT28HC256E-12JI ensures long-term data integrity with a minimum data retention period of 10 years.

Advantages and Disadvantages

Advantages

• Fast read and write operations
• Low power consumption
• Large storage capacity
• Extended temperature range
• Data protection features

Disadvantages

• Relatively higher cost compared to other non-volatile memory options
• Limited endurance (number of erase/write cycles) compared to some other memory technologies

Working Principles

The AT28HC256E-12JI utilizes EEPROM technology, which allows for electrically erasing and reprogramming data. It stores information using floating-gate transistors that can retain their charge even when the power is turned off. To read or write data, specific voltage levels are applied to the control pins, enabling the transfer of data between the memory cells and external devices.

Application Field Plans

The AT28HC256E-12JI finds applications in various fields, including: 1. Microcontrollers: It serves as non-volatile memory for program storage in microcontroller-based systems. 2. Computers: Used for storing BIOS (Basic Input/Output System) firmware and other critical data. 3. Consumer Electronics: Found in devices like digital cameras, set-top boxes, and smart home appliances for data storage purposes.

Alternative Models

There are several alternative models available that offer similar functionality to the AT28HC256E-12JI. Some notable alternatives include: - AT28C256 - AT28HC256 - 27C256 - 29C256

These models may vary in terms of speed, power consumption, package type, or additional features, so it is important to consider specific requirements when selecting an alternative.

In conclusion, the AT28HC256E-12JI is a high-speed, low-power EEPROM chip with a large storage capacity. Its reliable performance, extended temperature range, and data protection features make it suitable for various applications in the field of microcontrollers, computers, and consumer electronics.