AT28C256-20UM/883

Product Overview

Category

AT28C256-20UM/883 belongs to the category of non-volatile memory devices.

Use

This product is primarily used for storing and retrieving digital information in electronic systems.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High capacity: The AT28C256-20UM/883 has a storage capacity of 256 kilobits.
• Fast access time: It operates at a speed of 200 nanoseconds.
• Low power consumption: This device is designed to minimize power usage.
• Durable: It can withstand harsh environmental conditions due to its military-grade specifications.

Package

The AT28C256-20UM/883 is available in a ceramic package, which provides excellent protection against external factors such as moisture and temperature variations.

Essence

The essence of this product lies in its ability to reliably store and retrieve digital information in various electronic applications.

Packaging/Quantity

The AT28C256-20UM/883 is typically packaged in tubes or trays, with each package containing a specific quantity of devices. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Storage Capacity: 256 kilobits (32 kilobytes)
• Access Time: 200 nanoseconds
• Supply Voltage: 5 volts
• Operating Temperature Range: -55°C to +125°C
• Data Retention: 10 years minimum
• Endurance: 10,000 write cycles

Detailed Pin Configuration

The AT28C256-20UM/883 has a total of 28 pins, each serving a specific function. The pin configuration is as follows:

1. A0-A14: Address Inputs
2. CE: Chip Enable
3. OE: Output Enable
4. WE: Write Enable
5. VCC: Power Supply
6. GND: Ground
7. DQ0-DQ7: Data Input/Output

Functional Features

• Random Access: Allows for direct access to any memory location.
• Byte-Writable: Enables individual byte-level write operations.
• Block Erase: Supports erasing of specific blocks of memory.
• Hardware Data Protection: Provides protection against accidental writes.

Advantages and Disadvantages

Advantages

• Non-volatile nature ensures data integrity even during power loss.
• High storage capacity suitable for a wide range of applications.
• Fast access time allows for quick retrieval of information.
• Low power consumption prolongs battery life in portable devices.
• Military-grade specifications make it suitable for harsh environments.

Disadvantages

• Relatively higher cost compared to other memory technologies.
• Limited endurance due to the maximum number of write cycles.
• Requires additional circuitry for programming and erasing operations.

Working Principles

The AT28C256-20UM/883 utilizes electrically erasable programmable read-only memory (EEPROM) technology. It stores data by trapping electric charges within floating gate transistors. These charges determine the logic state of each memory cell, allowing for reliable data retention.

Detailed Application Field Plans

The AT28C256-20UM/883 finds applications in various fields, including: 1. Embedded Systems: Used for firmware storage in microcontrollers and microprocessors. 2. Automotive Electronics: Stores critical data such as calibration parameters and configuration settings. 3. Industrial Control Systems: Provides non-volatile memory for storing program code and data. 4. Aerospace and Defense: Utilized in avionics systems and military-grade equipment.

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar to AT28C256-20UM/883 but operates at a slower speed of 150 nanoseconds.
2. AT28C256-25PC: Offers a faster access time of 250 nanoseconds compared to the -20UM/883 variant.
3. AT28C256-30DM/883: Provides extended temperature range (-55°C to +150°C) for extreme environments.

These alternative models offer similar functionality but may have variations in speed, temperature range, or package type.

In conclusion, the AT28C256-20UM/883 is a non-volatile memory device with a high storage capacity and fast access time. It finds applications in various industries and offers advantages such as data integrity, low power consumption, and durability. However, it has limitations in terms of endurance and cost. Alternative models provide flexibility based on specific requirements.