AT28HC256-12SA

Product Overview

Category

AT28HC256-12SA belongs to the category of high-speed, low-power Electrically Erasable Programmable Read-Only Memory (EEPROM) chips.

Use

The AT28HC256-12SA is primarily used for non-volatile data storage in various electronic devices such as microcontrollers, computers, and consumer electronics.

Characteristics

• High-speed operation: The AT28HC256-12SA offers fast read and write access times, making it suitable for applications requiring quick data retrieval.
• 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), the AT28HC256-12SA can store a significant amount of data.
• Reliable data retention: The chip ensures data integrity with its robust memory cell design, providing reliable long-term storage.

Package

The AT28HC256-12SA is available in a standard 28-pin Small Outline Integrated Circuit (SOIC) package. This package offers ease of integration into various circuit boards and provides mechanical protection to the chip.

Essence

The essence of the AT28HC256-12SA lies in its ability to provide non-volatile data storage with high-speed operation, low power consumption, and a large storage capacity.

Packaging/Quantity

The AT28HC256-12SA is typically sold in reels or tubes, with each reel or tube containing a specific quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 120 ns
• Organization: 32K x 8 bits
• Endurance: 100,000 write cycles
• Data retention: 10 years
• Interface: Serial Peripheral Interface (SPI)

Detailed Pin Configuration

The AT28HC256-12SA 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)

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

Functional Features

• Random access: The AT28HC256-12SA allows random access to any memory location, enabling efficient data retrieval.
• Byte-wise programming: It supports byte-wise programming, allowing individual bytes to be written without affecting the rest of the memory.
• Hardware and software protection: The chip provides hardware and software protection mechanisms to prevent accidental writes or unauthorized access to the stored data.
• High reliability: With its advanced memory cell design, the AT28HC256-12SA ensures high reliability and data integrity.

Advantages and Disadvantages

Advantages

• Fast read and write access times
• Low power consumption
• Large storage capacity
• Reliable data retention
• Easy integration into circuit boards

Disadvantages

• Limited endurance (100,000 write cycles)
• Higher cost compared to other non-volatile memory options

Working Principles

The AT28HC256-12SA utilizes EEPROM technology, which allows for electrically erasing and reprogramming of data. It stores data in a grid of memory cells that can be individually addressed and modified using electrical signals. The chip uses a combination of transistors and capacitors to store and retrieve data.

Detailed Application Field Plans

The AT28HC256-12SA finds applications in various fields, including: 1. Microcontroller-based systems 2. Embedded systems 3. Industrial automation 4. Automotive electronics 5. Communication devices

Detailed and Complete Alternative Models

1. AT28HC256-12SU: Similar to AT28HC256-12SA, but in a different package (SOIC).
2. AT28HC256-12PI: DIP package variant of the AT28HC256-12SA.
3. AT28HC256-12JI: PLCC package variant of the AT28HC256-12SA.

These alternative models offer similar specifications and functionality, providing flexibility in choosing the most suitable package for specific applications.

In conclusion, the AT28HC256-12SA is a high-speed, low-power EEPROM chip that offers reliable non-volatile data storage. With its large storage capacity and various functional features, it finds applications in diverse fields. While it has certain limitations, such as limited endurance and higher cost, alternative models are available to cater to different packaging requirements.