AT28HC256E-90TU

Product Overview

Category

AT28HC256E-90TU 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: The AT28HC256E-90TU offers fast read and write operations, making it suitable for applications that require quick access to stored data.
• 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 (32 kilobytes), this chip provides ample space for storing critical data.
• Reliable data retention: The AT28HC256E-90TU ensures data integrity with a guaranteed minimum retention time of 10 years.

Package

The AT28HC256E-90TU comes in a small Thin Small Outline Package (TSOP) with 32 pins. This package offers compactness and ease of integration into various circuit designs.

Essence

The essence of the AT28HC256E-90TU lies in its ability to provide reliable, high-speed, and low-power data storage solutions for electronic devices.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of AT28HC256E-90TU chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 90 nanoseconds
• Organization: 32 kilobytes x 8 bits
• Interface: Serial Peripheral Interface (SPI)
• Write endurance: 100,000 cycles
• Data retention: 10 years

Detailed Pin Configuration

The AT28HC256E-90TU has a total of 32 pins, each serving a specific function. 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)

(Note: The remaining pins are not listed here for brevity.)

Functional Features

• Random access: The AT28HC256E-90TU allows random access to any memory location, enabling efficient data retrieval and modification.
• Byte-level programming: This chip supports byte-level programming, allowing individual bytes of data to be written or erased without affecting the rest of the memory contents.
• Hardware and software protection: The AT28HC256E-90TU offers various protection mechanisms, including write protection and software-controlled protection features, ensuring data 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 substantial amounts of data.
• Reliable data retention ensures long-term integrity.

Disadvantages

• Limited write endurance compared to other non-volatile memory technologies.
• Higher cost per bit compared to some alternative memory solutions.

Working Principles

The AT28HC256E-90TU utilizes EEPROM technology, which allows for electrically erasing and reprogramming data. It stores information by trapping electrical charges within floating gate transistors. When data needs to be written or erased, high voltages are applied to specific memory cells, altering the charge state of the floating gates.

Detailed Application Field Plans

The AT28HC256E-90TU finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration data, and calibration parameters.
2. Computers: Employed in BIOS chips, expansion cards, and other memory-dependent subsystems.
3. Consumer electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for data storage purposes.

Detailed and Complete Alternative Models

1. AT28C256: A lower-speed version of the AT28HC256E-90TU with an access time of 150 nanoseconds.
2. AT28HC256: A high-speed variant with an access time of 70 nanoseconds.
3. AT28HC256R: A radiation-tolerant version designed for use in space applications.

(Note: The above list is not exhaustive and serves as a representative sample of alternative models.)

In conclusion, the AT28HC256E-90TU is a high-speed, low-power EEPROM chip that offers reliable data storage capabilities. With its large capacity and compact package, it finds applications in various electronic devices. While it has certain limitations, such as limited write endurance and higher cost per bit, it remains a