iButton DS1990A-F5+ / TM1990A-F5 Key Tag

The DS1990A-F5+ / TM1990A-F5 iButton® key tag delivers a guaranteed unique ID (16 character hexadecimal) in a compact, durable iButton form. This read-only tag uses a 64-bit identification code and the 1-Wire protocol, transmitting data over a single conductor for reliable communication with contact devices. It’s an ideal, low-cost option for access control, inventory management, work-in-progress tracking and other identification applications.

Built with a stainless steel cover and a sturdy ABS/POM holder, the DS1990A-F5+ offers high resistance to magnetic and static fields and long operational life. These buttons are commonly used in door intercom systems, security systems and access control systems where dependable, long-lasting identification is required.

Please note: these are TM1990A-F5+ buttons, and they work almost identically to the DS1990A-F5+. If you are looking for DS1990A-F5+ buttons and handles, please see: DS1990A-F5+ iButton and DS9093A+ Plastic Fob Handle  

Specifications

• Format: TM (Touch Memory) iButton
• Identification code: 64-bit (read only)
• Unique ID: 12-digit serial number
• Lifetime: More than 10 years
• Dimensions (L × W): 59 × 19 mm
• Weight: 4 g (± 3%) with plastic fob
• Average number of readings: 1,000,000+ reads
• Material: Cover – Stainless steel; Holder – ABS/POM
• Operating temperature: −40°C to +85°C