DS1490F

2 of 3

DESCRIPTION

The 2-in-1 Fob has a DS2490 chip in its handle to convert 1-Wire signaling to USB communication. In

this way an iButton, 1-Wire chip, or 1-Wire instrument can have a 2-way communication link with its

USB host. Any iButton from the lowest cost to the most sophisticated can be mounted in the angled end

of the fob. A Java-powered iButton in combination with the 2-in-1 Fob provides the equivalent of a Java

smart card with a built in reader. Everything fits in the handle, so there is no cable for the notebook

connectivity. The USB guard protects the connector from debris and mechanical stresses while attached

to a key ring. Pressing the eject latch releases the guard of the 2-in-1 Fob for USB connection.

Together with the appropriate USB device driver, a notebook or desktop computer can read/write the

attached iButton with no cables or other power connections. You can press the Blue Dot with your

iButton for touch-and-go door entry.

By snapping on the Low Profile Blue Dot (DS1402L) to the iButton on the 2-in-1 Fob, the range of the

1-Wire signal can be extended to another Blue Dot receptor or other 1-Wire devices.