AT28C256E-20DM/883-815

Product Overview

Category

The AT28C256E-20DM/883-815 belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used in electronic devices for storing and retrieving data. It provides non-volatile memory storage, allowing information to be retained even when power is removed.

Characteristics

• Electrically erasable: The AT28C256E-20DM/883-815 can be erased and reprogrammed electronically, eliminating the need for physical removal or replacement.
• High capacity: With a storage capacity of 256 kilobits (32 kilobytes), this chip offers ample space for data storage.
• Fast operation: The chip operates at a speed of 200 nanoseconds, enabling quick access to stored information.
• Extended temperature range: The -20DM/883-815 variant is designed to operate reliably in a wide temperature range, making it suitable for harsh environments.
• Durable package: The chip is housed in a ceramic dual-inline package (DIP), providing protection against physical damage and environmental factors.

Packaging/Quantity

The AT28C256E-20DM/883-815 is typically packaged in tubes or trays, with each package containing a specified quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Memory capacity: 256 kilobits (32 kilobytes)
• Operating voltage: 5 volts
• Access time: 200 nanoseconds
• Temperature range: -55°C to +125°C
• Package type: Ceramic dual-inline package (DIP)

Detailed Pin Configuration

The AT28C256E-20DM/883-815 has a total of 28 pins, which are assigned specific functions as follows:

1. A0-A14: Address inputs
2. CE: Chip enable
3. OE: Output enable
4. WE: Write enable
5. VCC: Power supply voltage
6. GND: Ground
7. DQ0-DQ7: Data input/output

Functional Features

• Random access: The chip allows for random access to any memory location, facilitating efficient data retrieval.
• Byte-wise programming: Individual bytes can be programmed without affecting the rest of the memory contents, providing flexibility in data storage and modification.
• High reliability: The AT28C256E-20DM/883-815 offers reliable data retention and endurance, ensuring the integrity of stored information over an extended period.
• Low power consumption: The chip is designed to minimize power consumption, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable, eliminating the need for physical replacement
• High storage capacity for data-intensive applications
• Fast operation for quick access to stored information
• Extended temperature range for reliable performance in harsh environments
• Durable package for physical and environmental protection

Disadvantages

• Relatively higher cost compared to other non-volatile memory options
• Limited write endurance compared to some newer memory technologies

Working Principles

The AT28C256E-20DM/883-815 utilizes a combination of electronic circuits and memory cells to store and retrieve data. When powered on, the chip's address inputs are used to select a specific memory location. The data stored at that location can then be read or modified using the appropriate control signals (CE, OE, WE). The chip's internal circuitry ensures that the stored data remains intact even when power is removed.

Detailed Application Field Plans

The AT28C256E-20DM/883-815 finds application in various electronic devices and systems, including but not limited to: - Embedded systems - Automotive electronics - Industrial control systems - Communication equipment - Medical devices

In these applications, the chip is used for data storage, configuration settings, firmware updates, and other purposes that require non-volatile memory.

Detailed and Complete Alternative Models

While the AT28C256E-20DM/883-815 offers specific features and characteristics, there are alternative models available in the market that cater to different requirements. Some notable alternatives include:

1. AT28C256-15PU: Similar to the AT28C256E-20DM/883-815, this model offers a lower access time of 150 nanoseconds.
2. AT28C256-25PC: This variant operates at a higher voltage range of 5 volts ±10%.
3. AT28C256-12PI: With an extended temperature range of -40°C to +85°C, this model is suitable for less demanding environments.

These alternative models provide options for users with specific needs regarding speed, voltage, and temperature range.

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