AT28HC256-90SU-T

Product Overview

Category

AT28HC256-90SU-T 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 consumer electronics.

Characteristics

• High-speed operation: The AT28HC256-90SU-T offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• High capacity: With a storage capacity of 256 kilobits (32 kilobytes), this EEPROM chip provides ample space for storing critical information.
• Low power consumption: The device operates at low power levels, ensuring efficient energy usage in battery-powered applications.
• Reliable data retention: The AT28HC256-90SU-T guarantees data retention for extended periods, even in harsh environmental conditions.

Package

The AT28HC256-90SU-T comes in a small outline integrated circuit (SOIC) package, which facilitates easy integration into electronic circuits.

Essence

This EEPROM chip is designed to provide reliable and high-performance non-volatile memory storage for a wide range of electronic devices.

Packaging/Quantity

The AT28HC256-90SU-T is typically packaged in reels or tubes, with each 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: 32K x 8 bits
• Interface: Serial Peripheral Interface (SPI)
• Write endurance: 100,000 cycles
• Data retention: 10 years
• Operating temperature range: -40°C to +85°C

Detailed Pin Configuration

The AT28HC256-90SU-T has a total of 8 pins, each serving a specific function:

1. Chip Select (/CS): Enables or disables the chip for communication.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Serial Data Input (SI): Receives data from the external device.
4. Serial Data Output (SO): Transmits data to the external device.
5. Write Enable (/WE): Controls the write operation.
6. Hold (/HOLD): Suspends the current operation.
7. VCC: Power supply voltage.
8. Ground (GND): Common ground reference.

Functional Features

• High-speed data transfer: The AT28HC256-90SU-T supports fast serial communication, allowing for quick and efficient data transfer.
• Flexible write protection: The chip provides various write protection mechanisms, ensuring data integrity and preventing accidental modifications.
• Software and hardware compatibility: It is compatible with standard SPI interfaces, making it easy to integrate into existing systems.
• Low power consumption: The device operates in low-power modes, conserving energy and extending battery life.

Advantages and Disadvantages

Advantages

• High-speed operation enables rapid access to stored data.
• Large storage capacity accommodates extensive data requirements.
• Reliable data retention ensures long-term data integrity.
• Low power consumption makes it suitable for battery-powered devices.
• Compatibility with standard SPI interfaces simplifies integration.

Disadvantages

• Limited write endurance may restrict certain applications requiring frequent data modifications.
• Higher cost compared to lower-capacity EEPROM alternatives.
• Requires additional circuitry for proper interfacing and control.

Working Principles

The AT28HC256-90SU-T utilizes EEPROM technology, which allows for electrically erasing and reprogramming data. It stores information in memory cells consisting of floating-gate transistors. When data needs to be written, a high voltage is applied to the gate, trapping charge in the floating gate. To read data, the stored charge is measured, determining the logic state of each memory cell.

Detailed Application Field Plans

The AT28HC256-90SU-T finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration settings, and calibration data.
2. Computers: Employed in BIOS (Basic Input/Output System) chips for non-volatile storage of system parameters.
3. Consumer Electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for firmware storage and data logging.

Detailed and Complete Alternative Models

1. AT28C256: A lower-speed version of the AT28HC256-90SU-T with an access time of 150 nanoseconds.
2. AT28HC256E: An enhanced version with extended temperature range (-40°C to +125°C) and higher endurance (1,000,000 cycles).

These alternative models offer different specifications and features, allowing users to choose the most suitable option based on their specific requirements.

In conclusion, the AT28HC256