AT28HC256E-90SC

Product Overview

Category

AT28HC256E-90SC 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
• High-density storage capacity
• Electrically erasable and programmable
• Non-volatile memory
• Reliable and durable

Package

AT28HC256E-90SC is available in a small outline package (SOIC) which ensures easy integration into circuit boards.

Essence

The essence of AT28HC256E-90SC lies in its ability to provide reliable and high-speed non-volatile memory storage for electronic devices.

Packaging/Quantity

AT28HC256E-90SC is typically packaged in reels or tubes, with each reel/tube containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Operating Voltage: 2.7V - 5.5V
• Storage Capacity: 256 kilobits (32 kilobytes)
• Access Time: 90 nanoseconds
• Interface: Serial Peripheral Interface (SPI)
• Data Retention: Up to 10 years
• Endurance: 100,000 write cycles

Detailed Pin Configuration

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

Functional Features

• High-speed data transfer
• Easy integration with existing circuitry
• Low power consumption
• Reliable and durable operation
• Flexible read and write operations
• Built-in protection against accidental erasure or programming

Advantages

• High-speed operation allows for faster data access and transfer.
• High-density storage capacity enables the storage of large amounts of data in a compact chip.
• Electrically erasable and programmable nature allows for easy modification of stored data.
• Non-volatile memory ensures data retention even when power is disconnected.
• Reliable and durable construction ensures long-term performance.

Disadvantages

• Limited storage capacity compared to other memory technologies like Flash memory.
• Relatively higher cost per unit compared to some alternative memory solutions.
• Limited endurance, as the chip can only withstand a certain number of write cycles before potential failure.

Working Principles

AT28HC256E-90SC utilizes EEPROM technology, which allows for electrically erasing and reprogramming data. The chip stores data in a grid of memory cells, with each cell representing a bit of information. When data needs to be written or erased, specific electrical signals are applied to the appropriate pins, modifying the state of the memory cells.

Detailed Application Field Plans

AT28HC256E-90SC finds applications in various fields, including: 1. Microcontrollers: Used for storing firmware, configuration data, and program code. 2. Computers: Used for storing BIOS settings, boot code, and system parameters. 3. Consumer Electronics: Used for storing user preferences, calibration data, and device-specific configurations.

Detailed and Complete Alternative Models

1. AT28C256: Similar to AT28HC256E-90SC but operates at a slower speed.
2. AT29C256: Flash memory alternative with similar storage capacity and characteristics.
3. AT27C256R: One-time programmable (OTP) memory alternative with similar capacity.

These alternative models offer different features and characteristics, allowing users to choose the most suitable option based on their specific requirements.

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