AT28HC256F-90SC

Product Overview

Category

AT28HC256F-90SC 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 consumer electronics.

Characteristics

• High speed: The AT28HC256F-90SC offers fast read and write operations, making it suitable for applications that require quick access to stored data.
• High capacity: With a storage capacity of 256 kilobits (32 kilobytes), this EEPROM chip provides ample space for storing critical information.
• Reliable data retention: The AT28HC256F-90SC ensures long-term data integrity with its excellent data retention capabilities.
• Low power consumption: This chip is designed to operate efficiently with minimal power consumption, making it suitable for battery-powered devices.
• Wide operating voltage range: It can function reliably within a voltage range of 2.7V to 5.5V, providing flexibility in various electronic systems.

Package and Quantity

The AT28HC256F-90SC is available in a small outline package (SOIC) format. It is typically sold in reels or tubes containing multiple units, depending on the supplier's packaging specifications.

Specifications

• Organization: 32K x 8 bits
• Operating Voltage Range: 2.7V to 5.5V
• Access Time: 90 nanoseconds
• Standby Current: 10 microamps (max)
• Operating Temperature Range: -40°C to +85°C
• Endurance: 100,000 write cycles
• Data Retention: 10 years

Pin Configuration

The AT28HC256F-90SC has a total of 28 pins, which are assigned specific functions. 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)

Note: The remaining pins are not listed here for brevity.

Functional Features

• Byte-wise Read and Write Operations: The AT28HC256F-90SC allows individual bytes to be read from or written to, providing flexibility in data manipulation.
• Hardware Data Protection: This chip incorporates a write protection mechanism that prevents accidental modification of stored data.
• Automatic Page Write: It supports automatic page write operations, enabling efficient programming of multiple bytes within a single page.
• Software and Hardware Data Protection: The AT28HC256F-90SC offers both software and hardware methods to protect critical data from unauthorized access or modification.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick access to stored data.
• Large storage capacity accommodates extensive data requirements.
• Low power consumption prolongs battery life in portable devices.
• Wide operating voltage range enhances compatibility with various electronic systems.
• Reliable data retention ensures long-term integrity of stored information.

Disadvantages

• Limited endurance of 100,000 write cycles may pose constraints in certain applications requiring frequent data updates.
• Relatively higher cost compared to lower-capacity EEPROM chips.

Working Principles

The AT28HC256F-90SC utilizes EEPROM technology, which allows for non-volatile data storage. It employs a combination of floating gate transistors and electrically controlled gates 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. Reading data involves detecting the conductivity state of the floating gate, allowing the retrieval of stored data.

Application Field Plans

The AT28HC256F-90SC finds applications in various fields, including but not limited to: - Microcontrollers and embedded systems - Automotive electronics - Industrial control systems - Communication devices - Medical equipment - Consumer electronics

Alternative Models

Several alternative models with similar specifications and functionalities are available in the market. Some notable alternatives to the AT28HC256F-90SC include: - AT28C256-15PC - 24LC256-I/P - M95640-WMN6TP

These alternatives can be considered based on specific project requirements, availability, and cost considerations.

In conclusion, the AT28HC256F-90SC is a high-speed, high-capacity EEPROM chip that offers reliable non-volatile data storage. With its versatile features and wide range of applications, it serves as a crucial component in various electronic systems.