AT28HC256E-12SI

Product Overview

Category

AT28HC256E-12SI belongs to the category of high-speed, low-power 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 AT28HC256E-12SI offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• 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), this chip provides ample space for storing critical data.
• Reliable data retention: The AT28HC256E-12SI ensures data integrity with its excellent endurance and long-term data retention capabilities.
• Wide operating voltage range: It can operate within a voltage range of 2.7V to 5.5V, allowing compatibility with various systems.
• Extended temperature range: This chip can withstand temperatures ranging from -40°C to +85°C, enabling its use in harsh environments.

Package and Quantity

The AT28HC256E-12SI is available in a standard 28-pin Small Outline Integrated Circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Organization: 32K x 8 bits
• Operating Voltage Range: 2.7V to 5.5V
• Access Time: 120ns
• Standby Current: 10µA (typical)
• Operating Temperature Range: -40°C to +85°C
• Package Type: 28-pin SOIC

Pin Configuration

The AT28HC256E-12SI has a total of 28 pins, each serving a specific function. 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)

(Complete pin configuration table can be found in the product datasheet.)

Functional Features

• Byte-wise Read and Write Operations: The chip allows individual byte-level read and write operations, providing flexibility in data manipulation.
• Hardware Data Protection: It offers a hardware-based protection mechanism to prevent accidental writes or erasures, ensuring data integrity.
• Automatic Page Write: This feature enables efficient programming by allowing multiple bytes to be written in a single operation.
• Software Data Protection: The AT28HC256E-12SI supports software-controlled data protection, allowing users to selectively protect specific memory areas.

Advantages and Disadvantages

Advantages

• High-speed operation facilitates quick access to stored data.
• Low power consumption prolongs battery life in portable devices.
• Large storage capacity accommodates substantial amounts of data.
• Reliable data retention ensures long-term integrity of stored information.
• Wide operating voltage range enhances compatibility with various systems.
• Extended temperature range enables usage in extreme environments.

Disadvantages

• Relatively higher cost compared to other non-volatile memory options.
• Limited endurance compared to other memory technologies like Flash.

Working Principles

The AT28HC256E-12SI utilizes EEPROM technology, which allows for electrically erasing and reprogramming of data. It stores information in a grid of memory cells that can be individually addressed and modified using electrical signals. The chip employs a combination of transistors and floating gate structures to store and retrieve data reliably.

Application Field Plans

The AT28HC256E-12SI finds applications in various fields, including: 1. Microcontrollers: Used for storing firmware, configuration data, and critical parameters. 2. Computers: Employed in BIOS chips, expansion cards, and other memory-dependent components. 3. Consumer Electronics: Utilized in devices like smart TVs, set-top boxes, and gaming consoles for data storage purposes.

Alternative Models

Several alternative models with similar functionality are available in the market. Some notable alternatives to the AT28HC256E-12SI include: - AT28C256: A lower-speed variant of the same capacity from the same manufacturer. - 24LC256: An I2C-compatible EEPROM chip from a different manufacturer. - M93C86: A SPI-compatible EEPROM chip with comparable specifications.

(Note: For a comprehensive list of alternative models, refer to the product datasheet or consult the manufacturer's website.)

In conclusion, the AT28HC256E-12SI is a high-speed, low-power EEPROM chip that offers reliable non-volatile data storage. With its large capacity, wide operating voltage range, and extended temperature tolerance