AT28C040-20BC

Product Overview

Category

AT28C040-20BC belongs to the category of non-volatile memory devices.

Use

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

Characteristics

• Non-volatile: Retains data even when power is removed.
• High storage capacity: The AT28C040-20BC has a storage capacity of 4 megabits (512 kilobytes).
• Low power consumption: It operates at low power levels, making it suitable for battery-powered devices.
• Fast access time: The device offers fast read and write operations, ensuring efficient data retrieval and storage.
• Reliable: The AT28C040-20BC is designed to withstand harsh environmental conditions and has a high level of data integrity.

Package

The AT28C040-20BC is available in a standard 32-pin DIP (Dual In-line Package) format.

Essence

The essence of the AT28C040-20BC lies in its ability to provide non-volatile storage with high capacity and fast access times.

Packaging/Quantity

The AT28C040-20BC is typically packaged in reels or tubes, with each package containing a specific quantity of devices. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Storage Capacity: 4 Megabits (512 Kilobytes)
• Operating Voltage: 5V
• Access Time: 200 ns
• Interface: Parallel
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Minimum 10 years

Detailed Pin Configuration

The AT28C040-20BC has a total of 32 pins, which are assigned specific functions. The pin configuration is as follows:

1. A0-A16: 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 Inputs/Outputs

Functional Features

• Random Access: The AT28C040-20BC allows random access to any location within its memory array, enabling efficient data retrieval.
• Byte-Writable: It supports byte-level write operations, allowing for flexible data storage and modification.
• Erasable: The device can be electrically erased, making it suitable for applications that require frequent data updates.
• Hardware Data Protection: The AT28C040-20BC includes built-in features to protect against accidental writes or erasures, ensuring data integrity.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data retention even during power loss.
• High storage capacity meets the requirements of various applications.
• Fast access time enables quick data retrieval.
• Low power consumption makes it suitable for battery-powered devices.
• Reliable operation in harsh environmental conditions.

Disadvantages

• Limited write endurance: The AT28C040-20BC has a finite number of write cycles before it may become unreliable.
• Larger physical size compared to newer memory technologies.
• Higher cost per bit compared to some other memory options.

Working Principles

The AT28C040-20BC utilizes a combination of electronic circuits and memory cells to store and retrieve digital information. When powered on, the device allows the user to address specific memory locations and perform read or write operations. The stored data is retained even when power is removed, thanks to the non-volatile nature of the memory cells used.

Detailed Application Field Plans

The AT28C040-20BC finds application in various fields, including but not limited to:

1. Embedded Systems: Used for firmware storage in microcontrollers and other embedded devices.
2. Automotive Electronics: Provides non-volatile storage for critical data in automotive systems.
3. Industrial Control Systems: Used for storing configuration data and program code in industrial control applications.
4. Consumer Electronics: Enables data storage in devices such as gaming consoles, set-top boxes, and digital cameras.

Detailed and Complete Alternative Models

1. AT28C010-12PC: 1 Megabit (128 Kilobytes) capacity, parallel interface.
2. AT28C256-15PU: 256 Kilobits (32 Kilobytes) capacity, parallel interface.
3. AT28HC256E-90PI: 256 Kilobits (32 Kilobytes) capacity, high-speed parallel interface.

These alternative models offer different capacities and interface options to suit specific application requirements.

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