AT28HC256E-90SU

Product Overview

Category

AT28HC256E-90SU belongs to the category of high-speed, low-power Electrically Erasable Programmable Read-Only Memory (EEPROM) chips.

Use

This product is commonly used in various electronic devices for non-volatile data storage. It allows for easy and efficient retrieval of stored information even when power is turned off.

Characteristics

• High-speed operation
• Low power consumption
• Non-volatile memory
• Reliable data retention
• Easy to interface with microcontrollers

Package

AT28HC256E-90SU comes in a Small-Outline Integrated Circuit (SOIC) package. This package provides a compact form factor, making it suitable for space-constrained applications.

Essence

The essence of AT28HC256E-90SU lies in its ability to store and retrieve data reliably, while offering high-speed operation and low power consumption.

Packaging/Quantity

AT28HC256E-90SU is typically packaged in reels or tubes, containing a specific quantity of chips per package. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Operating Voltage: 2.7V - 5.5V
• Capacity: 256 kilobits (32 kilobytes)
• Access Time: 90 nanoseconds
• Interface: Serial Peripheral Interface (SPI)
• Data Retention: Up to 10 years
• Endurance: 100,000 write cycles

Detailed Pin Configuration

The AT28HC256E-90SU chip has a total of 8 pins, each serving a specific purpose:

1. Chip Select (/CS): Enables communication with the chip.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Serial Data Input (SI): Transfers data from the microcontroller to the chip.
4. Serial Data Output (SO): Transfers data from the chip to the microcontroller.
5. Write Enable (/WE): Enables write operations.
6. Hold (/HOLD): Pauses ongoing operations without losing data.
7. VCC: Power supply voltage.
8. Ground (GND): Common ground reference.

Functional Features

• High-speed data transfer: AT28HC256E-90SU offers fast access times, allowing for efficient data retrieval and storage.
• Low power consumption: The chip operates at low power levels, making it suitable for battery-powered devices.
• Easy integration: It can be easily interfaced with microcontrollers using the SPI interface.
• Reliable data retention: The EEPROM ensures data integrity even during power loss or system shutdown.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick data access.
• Low power consumption prolongs battery life.
• Non-volatile memory retains data even without power.
• Easy integration with microcontrollers simplifies design.
• Reliable data retention ensures data integrity.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per bit compared to other memory options.
• Limited endurance may require careful management of write cycles.

Working Principles

AT28HC256E-90SU utilizes EEPROM technology to store and retrieve data. It consists of a grid of memory cells that can be electrically programmed and erased. When data is written, charges are trapped in the memory cells, representing the stored information. During read operations, these charges are detected and converted back into data.

The chip uses a Serial Peripheral Interface (SPI) to communicate with the microcontroller. This interface allows for synchronous serial communication, enabling efficient data transfer between the two devices.

Detailed Application Field Plans

AT28HC256E-90SU finds applications in various electronic systems, including but not limited to: - Embedded systems - Consumer electronics - Automotive electronics - Industrial control systems - Medical devices

It is commonly used for storing configuration data, firmware, encryption keys, and other critical information that needs to be retained even when power is turned off.

Detailed and Complete Alternative Models

There are several alternative models available in the market that offer similar functionality to AT28HC256E-90SU. Some notable alternatives include: - AT28C256: Similar capacity and characteristics, but with slower access times. - AT25SF041: Serial Flash memory with higher capacity and faster access times. - 24LC256: I2C EEPROM with similar capacity and characteristics.

These alternative models provide options for different application requirements, allowing designers to choose the most suitable solution for their specific needs.

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