AT28HC256E-70SI

Product Overview

Category

AT28HC256E-70SI 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-70SI 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-70SI ensures data integrity with a guaranteed minimum retention time of 10 years.

Package and Quantity

The AT28HC256E-70SI comes in a standard 28-pin Small-Outline Integrated Circuit (SOIC) package. It is typically sold in reels containing multiple units, with each reel containing 250 chips.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 70 nanoseconds
• Standby current: 100 microamps (maximum)
• Write current: 5 milliamps (maximum)
• Data retention: 10 years (minimum)

Pin Configuration

The AT28HC256E-70SI 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)

(Continued for pins 8-28)

Functional Features

High-Speed Operation

The AT28HC256E-70SI offers fast access times, allowing for efficient data retrieval and storage operations.

Low Power Consumption

Designed with power efficiency in mind, this EEPROM chip minimizes energy consumption, making it suitable for battery-powered devices.

Reliable Data Retention

With a guaranteed minimum data retention time of 10 years, the AT28HC256E-70SI ensures that stored information remains intact over extended periods.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick data access.
• Low power consumption prolongs battery life.
• Large storage capacity accommodates ample data.
• Reliable data retention ensures long-term integrity.

Disadvantages

• Limited write endurance: Frequent write operations may reduce the lifespan of the chip.
• Relatively higher cost compared to other non-volatile memory options.

Working Principles

The AT28HC256E-70SI utilizes EEPROM technology, which allows for electrically erasing and reprogramming data. It stores information by trapping electrical charges within floating gate transistors. These charges can be manipulated using voltage signals to represent binary data.

Detailed Application Field Plans

The AT28HC256E-70SI finds applications in various fields, including but not limited to: 1. Microcontrollers: Used for storing firmware, configuration data, and calibration parameters. 2. Computers: Employed in BIOS chips and other non-volatile memory requirements. 3. Consumer Electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for data storage purposes.

Alternative Models

For those seeking alternatives to the AT28HC256E-70SI, several comparable EEPROM chips are available on the market. Some notable alternatives include: - AT28C256: A lower-cost option with similar specifications but slower access times. - AT29C256: Offers faster access times and a wider operating voltage range. - 24LC256: An I2C-compatible EEPROM chip suitable for applications requiring serial communication.

In conclusion, the AT28HC256E-70SI is a high-speed, low-power EEPROM chip that provides reliable non-volatile data storage. With its large capacity and efficient operation, it finds applications in various electronic devices. While it has some limitations, alternative models offer different features to suit specific requirements.