The DS1990R-F5# iButton provides a guaranteed unique ID in a small iButton® form, making it excellent for uses like a key in access control systems, inventory control applications, or work-in-progress tracking. However, there are many different uses for this iButton. Some of that we have seen include
- A key in a nursing home with many doors connected with a single 1-Wire bust using our LinkLocator to identify the door being accessed.
- A key to start carnival games so that user IDs may be tracked back to cash boxes, therefore eliminating theft.
- A guard tour device mounted on walls or other locations using the DS9093S iButton mount.
The DS1990R-F5#, unlike the DS1990A-F5#, guarantees that a presence pulse will be generated when the iButton® is placed against on a reader on a live 1-Wire bus. Other than that, the two iButtons® have the same functions.
If you have an application requiring a unique physical ID for a user or a location, please contact as to discuss how to use the DS1990R-F5#.
For more information on this product, please visit the DS1990R data sheet.
Want to learn more about how iButtonLink can work with your business? Check out our Business to Business page!