AT28HC256-90JI

Product Overview

Category

AT28HC256-90JI belongs to the category of high-speed, high-capacity EEPROM (Electrically Erasable Programmable Read-Only Memory) chips.

Use

This product is primarily used for non-volatile data storage in various electronic devices such as microcontrollers, computers, and communication systems.

Characteristics

• High speed: The AT28HC256-90JI offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• High capacity: With a storage capacity of 256 kilobits, this EEPROM chip can store a significant amount of data.
• Non-volatile: The stored data remains intact even when power is removed, ensuring reliable data retention.
• Low power consumption: The AT28HC256-90JI operates at low power levels, making it energy-efficient.

Package

The AT28HC256-90JI comes in a standard JEDEC-approved 32-pin plastic J-lead package. This package provides mechanical protection and facilitates easy integration into circuit boards.

Essence

The essence of the AT28HC256-90JI lies in its ability to provide high-speed, high-capacity non-volatile data storage in electronic devices.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of AT28HC256-90JI chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 90 nanoseconds
• Organization: 32,768 words x 8 bits
• Endurance: 100,000 write cycles
• Data retention: 10 years
• Interface: SPI (Serial Peripheral Interface)

Detailed Pin Configuration

The AT28HC256-90JI has a total of 32 pins, each serving a specific purpose. The pin configuration is as follows:

1. Chip Enable (CE)
2. Output Enable (OE)
3. Write Enable (WE)
4. Address Inputs (A0-A14)
5. Data Input/Output (DQ0-DQ7)
6. Supply Voltage (VCC)
7. Ground (GND)

(Continued for the remaining pins...)

Functional Features

• High-speed operation allows for quick access to stored data.
• Non-volatile nature ensures data retention even during power loss.
• Low power consumption makes it suitable for battery-powered devices.
• SPI interface enables easy integration with various microcontrollers and communication systems.

Advantages and Disadvantages

Advantages

• High-speed read and write operations.
• Large storage capacity.
• Non-volatile data retention.
• Low power consumption.

Disadvantages

• Relatively higher cost compared to lower-capacity EEPROM chips.
• Limited endurance of write cycles.

Working Principles

The AT28HC256-90JI utilizes EEPROM technology to store and retrieve data. It employs a combination of electrically controlled floating gate transistors and memory cells to achieve non-volatile data storage. When data needs to be written, the appropriate voltage levels are applied to the control pins, allowing the charge to be trapped in the floating gate. During read operations, the stored charge is sensed, enabling the retrieval of the stored data.

Detailed Application Field Plans

The AT28HC256-90JI finds applications in various fields, including but not limited to: - Microcontroller-based systems - Computer memory expansion - Communication systems - Industrial automation - Automotive electronics

Detailed and Complete Alternative Models

• AT28C256: Similar capacity and functionality, but with slower access times.
• AT28HC256R: Higher endurance and extended temperature range.
• AT28HC256E: Lower power consumption and extended temperature range.

These alternative models provide options with varying specifications to cater to different application requirements.

In conclusion, the AT28HC256-90JI is a high-speed, high-capacity EEPROM chip that offers reliable non-volatile data storage. Its characteristics, pin configuration, functional features, advantages, and disadvantages make it suitable for a wide range of applications in various fields. Additionally, alternative models provide flexibility to choose the most appropriate option based on specific needs.