DS1990A-F5+

The DS1990A-F5+ is a unique, compact, and highly specialized device from Maxim Integrated, designed primarily for applications requiring secure identification and data storage. This device is part of the iButton family, which is characterized by its small, button-like form factor that resembles a coin.

Physical Characteristics:

• Form Factor: The DS1990A-F5+ is encapsulated in a durable stainless steel housing, which provides excellent protection against environmental factors such as moisture, dust, and physical impact. The device is designed to withstand harsh conditions, making it suitable for various industrial and outdoor applications.
• Size: The iButton measures approximately 16 mm in diameter and 5 mm in height, making it easy to integrate into various systems or attach to keychains, cards, or other portable items.

Functionality:

• Identification: The DS1990A-F5+ features a unique, factory-lasered 64-bit serial number that serves as a permanent identifier. This serial number is unalterable and ensures that each device is unique, making it ideal for applications such as access control, asset tracking, and authentication.
• Data Storage: The device includes a small amount of non-volatile memory (typically 512 bits) that can be used to store additional data associated with the identifier. This memory can be utilized for various purposes, such as storing user credentials, timestamps, or other relevant information.
• Communication: The DS1990A-F5+ communicates using a 1-Wire protocol, which allows for simple and efficient data transfer with minimal wiring. This protocol enables multiple devices to be connected to a single data line, simplifying system design and reducing costs.

Electrical Characteristics:

• Operating Voltage: The device operates over a wide voltage range, typically from 2.8V to 6.0V, making it compatible with various power supply configurations.
• Low Power Consumption: The DS1990A-F5+ is designed for low power consumption, which is crucial for battery-operated applications. It can operate in a sleep mode to conserve energy when not in use.

Applications:

The DS1990A-F5+ is widely used in various applications, including:

• Access Control Systems: For secure entry to buildings or restricted areas.
• Asset Tracking: To monitor and manage inventory or equipment.
• Event Ticketing: For secure and verifiable ticketing solutions.
• Personal Identification: In systems requiring user authentication, such as time and attendance tracking.

Conclusion:

The DS1990A-F5+ from Maxim Integrated is a versatile and robust solution for secure identification and data storage needs. Its unique features, including a durable design, unique serial number, and efficient communication protocol, make it an ideal choice for a wide range of applications in both consumer and industrial markets.