AT28HC256E-90TU-T

Product Overview

Category

AT28HC256E-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 storage of data in various electronic devices such as microcontrollers, computers, and consumer electronics.

Characteristics

• High-speed operation: The AT28HC256E-90TU-T offers fast read and write access times, making it suitable for applications requiring 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 (32 kilobytes), this chip provides ample space for storing critical data.
• Extended temperature range: The AT28HC256E-90TU-T can operate reliably in a wide temperature range, from -40°C to +85°C.
• High endurance: It supports a minimum of 100,000 erase/write cycles, ensuring long-term reliability.

Package and Packaging/Quantity

The AT28HC256E-90TU-T is available in a surface-mount 32-lead Thin Small Outline Package (TSOP). It is typically supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply voltage: 2.7V to 5.5V
• Operating current: 10 mA (typical)
• Standby current: 1 µA (typical)
• Access time: 90 ns (maximum)
• Data retention: 10 years (minimum)
• Interface: SPI (Serial Peripheral Interface)

Detailed Pin Configuration

The AT28HC256E-90TU-T features a 32-pin TSOP package with the following pin configuration:

1. Chip Enable (CE)
2. Output Enable (OE)
3. Write Enable (WE)
4. Address Inputs (A0-A14)
5. Data Input/Output (I/O0-I/O7)
6. Supply Voltage (VCC)
7. Ground (GND)

Functional Features

• Byte-wise Read and Write: The AT28HC256E-90TU-T allows individual bytes to be read from or written to, providing flexibility in data manipulation.
• Hardware Data Protection: It supports a hardware write protection mechanism to prevent accidental modification of stored data.
• Software Write Protection: This chip also offers software-controlled write protection, allowing specific memory areas to be locked to prevent unauthorized writes.
• Fast Page Write: It supports fast page write operations, enabling efficient programming of multiple bytes within a single page.

Advantages and Disadvantages

Advantages

• High-speed operation facilitates quick data access.
• Low power consumption extends battery life in portable devices.
• Large storage capacity accommodates substantial amounts of data.
• Extended temperature range ensures reliable performance in various environments.
• High endurance guarantees long-term reliability.

Disadvantages

• Limited compatibility: The AT28HC256E-90TU-T uses the SPI interface, which may not be compatible with all systems.
• Relatively small storage capacity compared to other EEPROM chips available in the market.

Working Principles

The AT28HC256E-90TU-T utilizes EEPROM technology, which allows for non-volatile storage of data even when power is removed. It employs a combination of floating gate transistors and electrically isolated gates to store and retrieve data electronically.

Detailed Application Field Plans

The AT28HC256E-90TU-T finds applications in various fields, including but not limited to: - Microcontroller-based systems - Embedded systems - Industrial automation - Automotive electronics - Medical devices - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models to the AT28HC256E-90TU-T include: - AT28C256: A lower-speed version of the same capacity EEPROM chip. - AT29C256: A similar EEPROM chip with a different interface (parallel instead of serial). - AT24C256: An I2C-compatible EEPROM chip with the same capacity.

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

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