DS1990A TM1990A-F5 ibutton key/Electronic key
 
Description
 
The TM1990A 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 TM1990A 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 TM1990A to be used easily by human operators.
 
 
 
Key Features

1. Can Be Read in Less Than 5ms
2. Operating Range: 2.8V to 6.0V, -40°C to +85°C

Common iButton Features

1. Unique 64-Bit Registration Number Ensures Error-Free Device Selection and Absolute Traceability Because No Two Parts are Alike
2. Built-In Multidrop Controller for 1-Wire Net
3. Digital Identification by Momentary Contact
4. Data Can Be Accessed While Affixed to Object
5. Economically Communicates to Bus Master with a Single Digital Signal at 16.3kbps
6. Button Shape is Self-Aligning with Cup-Shaped Probes
7. Durable Stainless-Steel Case 
8. Easily Affixed with Self-Stick Adhesive Backing, Latched by its Flange, or Locked with a Ring Pressed Onto its Rim


Applications/Uses

Access Control
Inventory Control
Tool Management
Work-in-Progress Tracking