AT28HC256-90SI

Product Overview

Category

AT28HC256-90SI 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 communication systems.

Characteristics

• High-speed operation: The AT28HC256-90SI offers fast read and write access times, making it suitable for applications that require 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, the AT28HC256-90SI can store a significant amount of data.
• Reliable data retention: The EEPROM technology ensures that stored data remains intact even when power is removed.

Package

The AT28HC256-90SI is available in a Small-Outline Integrated Circuit (SOIC) package. This package provides a compact form factor and ease of integration into electronic circuits.

Essence

The essence of the AT28HC256-90SI lies in its ability to provide reliable, non-volatile data storage with high-speed operation and low power consumption.

Packaging/Quantity

The AT28HC256-90SI is typically packaged 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: 90 nanoseconds
• 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 AT28HC256-90SI 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)

Functional Features

• Random access: The AT28HC256-90SI allows random access to any memory location, enabling efficient data retrieval.
• Byte-level programming: This EEPROM chip supports byte-level programming, allowing individual bytes to be written or modified without affecting the entire memory array.
• Hardware and software protection: The AT28HC256-90SI provides various protection mechanisms, including write protection and software-controlled protection features, ensuring data integrity and security.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick data access.
• Low power consumption prolongs battery life in portable devices.
• Large storage capacity accommodates a significant amount of data.
• Reliable data retention ensures long-term data integrity.

Disadvantages

• Limited endurance of 100,000 write cycles may be a constraint in certain applications.
• Higher cost compared to other non-volatile memory options such as Flash memory.

Working Principles

The AT28HC256-90SI utilizes EEPROM technology, which allows for electrically erasing and reprogramming of data. It consists of a memory array organized into rows and columns, with each cell storing one bit of information. The data can be written or read by applying appropriate voltage levels to specific pins.

Detailed Application Field Plans

The AT28HC256-90SI finds applications in various fields, including: 1. Microcontrollers: Used for storing firmware, configuration data, and calibration parameters. 2. Computers: Employed in BIOS chips and other non-volatile memory requirements. 3. Communication systems: Used for storing network settings, device configurations, and firmware updates.

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar to the AT28HC256-90SI, but with a slower access time of 150 nanoseconds.
2. AT28HC256E-90SI: An enhanced version with extended temperature range and improved endurance.

These alternative models offer similar functionality but may have variations in specifications and features.

In conclusion, the AT28HC256-90SI is a high-speed, low-power EEPROM chip that provides reliable non-volatile data storage. With its large capacity and compact package, it finds applications in various electronic devices. While it has advantages such as fast operation and low power consumption, it also has limitations in terms of endurance and cost. Nonetheless, it remains a popular choice for applications requiring non-volatile memory.