AT28HC256E-90SI

Product Overview

Category

The AT28HC256E-90SI belongs to the category of high-speed, low-power Electrically Erasable Programmable Read-Only Memory (EEPROM) chips.

Use

This product is commonly used in electronic devices for storing and retrieving data. It provides non-volatile memory storage that can be electrically erased and reprogrammed.

Characteristics

• High speed: The AT28HC256E-90SI offers fast read and write operations, making it suitable for applications requiring quick data access.
• 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 (32 kilobytes), it provides ample space for data storage.
• Reliable data retention: The stored data remains intact even when the power supply is disconnected or interrupted.

Package

The AT28HC256E-90SI comes in a Small-Outline Integrated Circuit (SOIC) package. This package type ensures easy integration into various electronic systems.

Essence

The essence of the AT28HC256E-90SI lies in its ability to provide reliable, high-speed, and low-power data storage for electronic devices.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of AT28HC256E-90SI chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

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

Detailed Pin Configuration

The AT28HC256E-90SI has a total of 28 pins. 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 Inputs/Outputs (DQ0-DQ7)
6. Supply Voltage (VCC)
7. Ground (GND)

Functional Features

• Random access: The AT28HC256E-90SI allows random access to any memory location, enabling efficient data retrieval.
• High-speed operation: With a fast access time of 90 nanoseconds, this EEPROM chip ensures quick data transfer.
• Low-power consumption: The low-power design of the AT28HC256E-90SI minimizes energy usage, extending battery life in portable devices.
• Hardware and software write protection: This feature prevents accidental or unauthorized modification of stored data.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data access.
• Low-power consumption prolongs battery life.
• Large storage capacity accommodates substantial amounts of data.
• Reliable data retention ensures data integrity over extended periods.

Disadvantages

• Limited endurance: The EEPROM chip has a finite number of write cycles before it may start to degrade.
• Relatively higher cost compared to other non-volatile memory options.

Working Principles

The AT28HC256E-90SI utilizes electrically controlled floating gate transistors to store and retrieve data. When writing data, an electrical charge is applied to the floating gate, altering its conductivity and storing the desired information. During read operations, the stored charge is measured to determine the stored data.

Detailed Application Field Plans

The AT28HC256E-90SI finds applications in various electronic systems, including but not limited to: - Embedded systems - Consumer electronics - Automotive electronics - Industrial control systems - Medical devices

Detailed and Complete Alternative Models

1. AT28HC256E-90SU: Similar to the AT28HC256E-90SI, but comes in a different package (SOIC) and has a different temperature range.
2. AT28HC256E-90PI: DIP package variant of the AT28HC256E-90SI, suitable for through-hole mounting.
3. AT28HC256E-90JI: PLCC package variant of the AT28HC256E-90SI, offering enhanced mechanical stability.

These alternative models provide similar functionality and performance characteristics as the AT28HC256E-90SI, but with variations in package type and other specifications.

In conclusion, the AT28HC256E-90SI is a high-speed, low-power EEPROM chip that offers reliable data storage and retrieval capabilities. Its large storage capacity, along with its fast access time and low power consumption, make it suitable for a wide range of electronic applications. While it has limitations in terms of endurance and cost, there are alternative models available to cater to specific requirements.