iButton Key Fob with DS1990A-F5 -Yellow

Description

The iButton serial number (DS1990A) is a rugged data carrier that serves as an electronic registration number for automatic identification. Data is transferred serially through the 1-Wire? protocol, which requires only a single data lead and a ground return. Every DS1990A is factory lasered with a guaranteed unique 64-bit registration number that allows for absolute traceability. The durable stainless-steel iButton package is highly resistant to environmental hazards such as dirt, moisture, and shock. Its compact coin-shaped profile is self-aligning with mating receptacles, allowing the DS1990A to be used easily by human operators. Accessories enable the DS1990A to be mounted on almost any object, including containers, pallets, and bags.

You can replace the data line, address line, control line and power line with a single line so that iButton achieves single line communication through a multi-function device. When the host is powered, iButton gives the response to the host through switching the impedances between 50Ω and 500,000Ω. The lengths of time the signal is pulled down(long or short) show the digital logics. Due to the range of witching impedances is 1-10,000, the resistances of the contact points will not affect the identification of the digital signals.

Key Features

• Unique, factory-lasered and tested 64-bit
• Digital identification by momentary contact.
• Chip-based data carrier compactly stores information.
• Data can be accessed while affixed to an object.
• Economically communicates to bus master with a single digital signal at 16.3k bits per second.
• Standard 16 mm diameter and 1-Wire protocol ensure compatibility with INFORMATION BUTTON family.
• Button shape is self-aligning with cupshaped probes.
• Durable stainless steel case engraved with registration number withstands harsh environments.
• Easily affixed with self-stick adhesive backing, latched by its flange, or locked with a ring pressed onto its rim.
• Presence detector acknowledges when reader first applies voltage.
• Stainless steel package with su304-0.3
• Resistant to heat, Operating temperature range from -40°C to +70°C
• Over 10 years of data retention

Applications

• Security patrol, sauna door locks, electronic door locks
• Door intercom, card systems, identification and banking
• Communications, rail transportation, transportation and others

The DS1990A can be found on its data sheet here: DS1990A DataSheet, and key fobs datasheet: DS9093A DataSheet.