All Max Electronics Ltd

Foshan, China

• MOQ 50 Piece(s)

We are offering ibutton key fobs. 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.