AT28HC256F-90TU-T

Product Overview

Category

AT28HC256F-90TU-T 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 consumer electronics.

Characteristics

• High-speed operation
• Low power consumption
• Non-volatile memory
• Large storage capacity
• Reliable data retention
• Easy to interface with other electronic components

Package

AT28HC256F-90TU-T comes in a small form factor package, making it suitable for space-constrained applications. The package type is TU, which stands for Thin Small Outline Package (TSOP), ensuring efficient heat dissipation.

Essence

The essence of AT28HC256F-90TU-T lies in its ability to provide reliable and high-speed non-volatile memory storage, enabling efficient data handling and processing in electronic devices.

Packaging/Quantity

AT28HC256F-90TU-T 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's specifications.

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 AT28HC256F-90TU-T chip has a total of 8 pins, each serving a specific function:

1. Chip Select (/CS): Enables communication with the chip when set to a low logic level.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Serial Data Input (SI): Receives data from the external device during write operations.
4. Serial Data Output (SO): Transmits data to the external device during read operations.
5. Write Enable (/WE): Enables or disables write operations when set to a low logic level.
6. Hold (/HOLD): Pauses ongoing operations when set to a low logic level.
7. VCC: Power supply voltage input.
8. Ground (GND): Common ground reference.

Functional Features

• High-speed data transfer
• Low power consumption during both active and standby modes
• Hardware and software write protection mechanisms
• Flexible memory organization with multiple addressable blocks
• Automatic page write and erase operations for efficient programming

Advantages and Disadvantages

Advantages

• Fast access time allows for quick data retrieval and processing.
• Low power consumption prolongs battery life in portable devices.
• Reliable data retention ensures long-term storage of critical information.
• Versatile interface compatibility simplifies integration into various electronic systems.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per unit compared to traditional Read-Only Memory (ROM) chips.
• Susceptible to data corruption in case of power failure during write operations.

Working Principles

AT28HC256F-90TU-T utilizes EEPROM technology, which allows for electrically erasing and reprogramming data. It stores information using floating-gate transistors that can trap or release electrical charges, representing binary states (0s and 1s). The stored data remains intact even when the power is turned off.

The chip's internal circuitry includes control logic, memory cells, and an interface for communication with external devices. When data needs to be written or read, the appropriate signals are sent through the pins, enabling the desired operation.

Detailed Application Field Plans

AT28HC256F-90TU-T finds applications in various fields, including:

1. Microcontrollers: Used for firmware storage and data logging.
2. Computers: Employed in BIOS chips and configuration memory.
3. Consumer Electronics: Utilized in smart devices, gaming consoles, and digital cameras for data storage.

Detailed and Complete Alternative Models

1. AT28C256: Similar capacity and functionality but with slower access time.
2. AT29C256: Flash memory alternative with faster erase and write times.
3. AT27C256R: One-time programmable ROM chip with lower cost but no reprogrammability.

These alternative models offer different trade-offs in terms of speed, cost, and reprogrammability, allowing users to choose based on their specific requirements.

In conclusion, AT28HC256F-90TU-T is a high-speed, low-power EEPROM chip that provides reliable non-volatile memory storage. Its versatile interface, large storage capacity, and efficient data handling make it suitable for a wide range of electronic applications.