AT28HC256-12TI

Product Overview

Category

AT28HC256-12TI 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 communication systems.

Characteristics

• High-speed operation: The AT28HC256-12TI offers fast read and write access times, making it suitable for applications that require quick data retrieval.
• High capacity: With a storage capacity of 256 kilobits, this EEPROM chip provides ample space for storing critical data.
• Low power consumption: The device operates at low power levels, ensuring efficient energy usage.
• Reliable data retention: The AT28HC256-12TI maintains data integrity for extended periods, even in harsh environmental conditions.

Package

The AT28HC256-12TI is available in a standard 28-pin dual in-line package (DIP), which facilitates easy integration into circuit boards.

Essence

The essence of the AT28HC256-12TI lies in its ability to store and retrieve data reliably, quickly, and efficiently, making it an essential component in many electronic systems.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of AT28HC256-12TI 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: 32,768 words x 8 bits
• Endurance: 100,000 write cycles
• Data retention: 10 years
• Interface: Serial Peripheral Interface (SPI)

Detailed Pin Configuration

The AT28HC256-12TI features a 28-pin dual in-line package (DIP) with the following pin configuration:

1. Chip Enable (CE)
2. Output Enable (OE)
3. Write Enable (WE)
4. Address Inputs (A0-A14)
5. Data Input/Output (I/O0-I/O7)
6. Supply Voltage (VCC)
7. Ground (GND)

Please refer to the datasheet for a complete pinout diagram.

Functional Features

• Random access: The AT28HC256-12TI allows random access to any memory location, enabling efficient data retrieval.
• Byte-level programming: It supports byte-level programming, allowing individual bytes to be written or modified without affecting the entire memory contents.
• Hardware and software protection: This EEPROM chip provides various protection mechanisms, including write protection pins and software-controlled protection features, ensuring data security.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick data access.
• Large storage capacity accommodates extensive data requirements.
• Low power consumption ensures energy efficiency.
• Reliable data retention guarantees long-term data integrity.
• Versatile interface compatibility simplifies integration into different systems.

Disadvantages

• Limited endurance of 100,000 write cycles may pose constraints in certain applications.
• Higher cost compared to lower-capacity EEPROM alternatives.

Working Principles

The AT28HC256-12TI utilizes electrically erasable floating-gate transistors to store data. When writing data, an electrical charge is applied to the floating gate, altering its threshold voltage. This change determines whether the transistor represents a logical "0" or "1". During read operations, the stored charge is measured to determine the stored data.

Detailed Application Field Plans

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

Detailed and Complete Alternative Models

1. AT28C256-15PU: 256 kilobit EEPROM with a 150 ns access time, available in a 28-pin DIP package.
2. AT29C256-12PC: 256 kilobit Flash memory with a 120 ns access time, available in a 32-pin DIP package.
3. AT27C256R-70PU: 256 kilobit OTP (One-Time Programmable) EPROM with a 70 ns access time, available in a 28-pin DIP package.

These alternative models offer similar storage capacities and functionalities but may vary in terms of access time, package type, or specific features.

In conclusion, the AT28HC256-12TI is a high-speed, high-capacity EEPROM chip that provides reliable data storage for various electronic systems. Its characteristics, pin configuration, functional features, advantages, and disadvantages make it suitable for a wide range of applications.