AT28HC256F-90JU-T

Product Overview

Category

AT28HC256F-90JU-T belongs to the category of high-speed, high-density 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 AT28HC256F-90JU-T offers fast read and write access times, making it suitable for applications requiring quick data retrieval.
• High-density storage: With a capacity of 256 kilobits, this EEPROM chip provides ample space for storing large amounts of data.
• Electrically erasable: The AT28HC256F-90JU-T can be easily erased and reprogrammed electrically, eliminating the need for physical removal or replacement of the chip.
• Low power consumption: This chip is designed to operate efficiently with minimal power requirements, making it suitable for battery-powered devices.
• Wide temperature range: The AT28HC256F-90JU-T can function reliably across a wide temperature range, making it suitable for use in various environments.
• RoHS compliant: This product adheres to the Restriction of Hazardous Substances directive, ensuring its environmental friendliness.

Package and Quantity

The AT28HC256F-90JU-T is available in a standard 32-pin PLCC (Plastic Leaded Chip Carrier) package. It is typically sold in reels containing multiple units, with the exact quantity varying depending on the supplier.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Operating Voltage: 2.7V - 5.5V
• Access Time: 90 nanoseconds
• Data Retention: 10 years
• Endurance: 100,000 write cycles
• Package Type: PLCC-32

Pin Configuration

The AT28HC256F-90JU-T features a total of 32 pins, each serving a specific function. The pin configuration is as follows:

```

Pin Name Description

1 A14 Address Input 2 A12 Address Input 3 A7 Address Input 4 A6 Address Input 5 A5 Address Input 6 A4 Address Input 7 A3 Address Input 8 A2 Address Input 9 A1 Address Input 10 A0 Address Input 11 /OE Output Enable 12 /WE Write Enable 13 VSS Ground 14 DQ0 Data Input/Output 15 DQ1 Data Input/Output 16 DQ2 Data Input/Output 17 DQ3 Data Input/Output 18 DQ4 Data Input/Output 19 DQ5 Data Input/Output 20 DQ6 Data Input/Output 21 DQ7 Data Input/Output 22 VCC Power Supply 23 A8 Address Input 24 A9 Address Input 25 A11 Address Input 26 A10 Address Input 27 A13 Address Input 28 /CE Chip Enable 29 NC No Connection 30 /RP Ready/Busy Output 31 /WP Write Protect 32 VCC Power Supply ```

Functional Features

• High-speed operation allows for quick data access and retrieval.
• Electrically erasable and reprogrammable, enabling easy updates and modifications to stored data.
• Low power consumption ensures efficient operation, particularly in battery-powered devices.
• Wide temperature range compatibility makes it suitable for use in various environments.
• RoHS compliance ensures environmental friendliness.

Advantages and Disadvantages

Advantages

• High-speed operation enables fast data access.
• Large storage capacity of 256 kilobits accommodates substantial amounts of data.
• Electrically erasable and reprogrammable, eliminating the need for physical replacement.
• Low power consumption prolongs battery life in portable devices.
• Wide temperature range compatibility allows for versatile usage.
• RoHS compliance demonstrates environmental responsibility.

Disadvantages

• Limited endurance of 100,000 write cycles may be a constraint in certain applications.
• The PLCC package may require additional space compared to smaller form factors.

Working Principles

The AT28HC256F-90JU-T operates based on EEPROM technology. It utilizes electrically controlled floating gate transistors to store and retrieve data. When data needs to be written, an electrical charge is applied to the floating gate, altering its conductivity and storing the desired information. To read the stored data,