AT28HC256-70JU

Product Overview

Category

AT28HC256-70JU 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 AT28HC256-70JU 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 AT28HC256-70JU can store a significant amount of data.
• Reliable data retention: The EEPROM technology ensures that data remains intact even when power is disconnected.

Package

The AT28HC256-70JU is available in a 32-pin PLCC (Plastic Leaded Chip Carrier) package.

Essence

The essence of the AT28HC256-70JU lies in its ability to provide reliable, non-volatile data storage with high-speed operation and low power consumption.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of AT28HC256-70JU chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 70 nanoseconds
• Organization: 32K x 8 bits
• Endurance: 100,000 write cycles
• Data retention: 10 years
• Interface: SPI (Serial Peripheral Interface)

Detailed Pin Configuration

The AT28HC256-70JU has a total of 32 pins, each serving a specific purpose. Here is the detailed pin configuration:

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. VCC - Power Supply
10. A8 - Address Input
11. A9 - Address Input
12. A10 - Address Input
13. A11 - Address Input
14. A12 - Address Input
15. A13 - Address Input
16. A14 - Address Input
17. A15 - Address Input
18. /CS - Chip Select
19. SCK - Serial Clock
20. SI - Serial Data Input
21. SO - Serial Data Output
22. WP - Write Protect
23. GND - Ground
24. /OE - Output Enable
25. /WE - Write Enable
26. NC - No Connection
27. NC - No Connection
28. NC - No Connection
29. NC - No Connection
30. NC - No Connection
31. NC - No Connection
32. NC - No Connection

Functional Features

• High-speed read and write operations enable quick access to stored data.
• Low power consumption ensures efficient use of energy in battery-powered devices.
• SPI interface allows for easy integration with various microcontrollers and other electronic systems.
• Write protect feature (WP pin) provides an additional layer of security by preventing accidental or unauthorized writes to the memory.

Advantages and Disadvantages

Advantages

• Fast operation speed facilitates efficient data access.
• Low power consumption extends battery life in portable devices.
• Large storage capacity accommodates a significant amount of data.
• Reliable data retention ensures the integrity of stored information.

Disadvantages

• Limited endurance of 100,000 write cycles may be a constraint in certain applications requiring frequent writes.
• The PLCC package may not be suitable for all design requirements, as it requires additional space compared to smaller packages.

Working Principles

The AT28HC256-70JU utilizes EEPROM technology, which allows for non-volatile storage of data. It employs a combination of electrically controlled gates and floating gate transistors to store and retrieve information. When data is written, charges are trapped in the floating gate, altering the transistor's behavior. These charges can be later sensed to read the stored data.

Detailed Application Field Plans

The AT28HC256-70JU finds application in various fields, including but not limited to: - Microcontrollers: Used for storing firmware, configuration data, and other critical information. - Computers: Employed in BIOS chips and other non-volatile memory requirements. - Consumer Electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for data storage purposes.

Detailed and Complete Alternative Models