AT28HC256F-90LM/883

Product Overview

Category

AT28HC256F-90LM/883 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 communication systems.

Characteristics

• High-speed operation: The AT28HC256F-90LM/883 offers fast read and write operations, making it suitable for applications requiring 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.
• Extended temperature range: The AT28HC256F-90LM/883 is capable of operating reliably in a wide temperature range, from -55°C to 125°C.
• Durable package: It comes in a rugged ceramic package, ensuring protection against environmental factors like moisture, dust, and mechanical stress.
• Long-term data retention: The EEPROM technology employed in this chip allows for data retention for extended periods, even without power supply.

Packaging/Quantity

The AT28HC256F-90LM/883 is typically packaged in a 28-pin ceramic Dual In-line Package (DIP). It is available in quantities suitable for both small-scale and large-scale production.

Specifications

• Supply voltage: 4.5V to 5.5V
• Operating current: 10 mA (typical)
• Standby current: 100 µA (typical)
• Access time: 90 ns (maximum)
• Data retention: 10 years (minimum)
• Endurance: 100,000 write cycles (minimum)
• Package dimensions: 0.6" x 0.3" x 0.1"

Pin Configuration

The AT28HC256F-90LM/883 has a total of 28 pins, each serving a specific function. The pin configuration is as follows:

```

Pin Name Description

1 A14 Address Input 2 A12 Address Input 3 A7 Address Input 4 A6 Address Input 5 A5 Address Input 6 A4 Address Input 7 A3 Address Input 8 A2 Address Input 9 A1 Address Input 10 A0 Address Input 11 CE Chip Enable Input 12 OE Output Enable Input 13 WE Write Enable Input 14 I/O0 Data Input/Output 15 I/O1 Data Input/Output 16 I/O2 Data Input/Output 17 I/O3 Data Input/Output 18 VCC Supply Voltage 19 GND Ground 20 NC No Connection 21 A8 Address Input 22 A9 Address Input 23 A11 Address Input 24 A10 Address Input 25 A13 Address Input 26 I/O4 Data Input/Output 27 I/O5 Data Input/Output 28 I/O6 Data Input/Output ```

Functional Features

• High-speed operation allows for quick access to stored data.
• Low power consumption ensures energy efficiency in battery-powered devices.
• Non-volatile memory retains data even without power supply.
• Durable ceramic package provides protection against environmental factors.
• Wide temperature range enables reliable operation in various conditions.

Advantages and Disadvantages

Advantages

• Fast read and write operations.
• Low power consumption.
• Large storage capacity.
• Extended temperature range.
• Durable package for protection.
• Long-term data retention.

Disadvantages

• Limited endurance with a maximum of 100,000 write cycles.
• Higher cost compared to other memory technologies.

Working Principles

The AT28HC256F-90LM/883 utilizes EEPROM technology, which allows for electrically erasing and reprogramming of data. It consists of an array of floating-gate transistors that can be individually programmed or erased using electrical signals. When data is written, charges are trapped in the floating gate, altering the transistor's behavior and storing the desired information. The stored data can be read by applying appropriate voltage levels to the chip's pins.

Detailed Application Field Plans

The AT28HC256F-90LM/883 finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration settings, and critical data in microcontroller-based systems.
2. Computers: Employed in BIOS chips, expansion cards, and other computer peripherals requiring