Readable and Writable Dallas iButton RW1990 Tag

• Function: Read and Write (RW1990); Only Read (TM1990)
• Material: ABS+Stainless Steel
• Structure: RW1990 / TM1990A-F5
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: RW1990
• Application Field: Access Control, Inventory Control, Tool Management
• Transport Package: Standard Carton Box
• Specification: 16.25x5.89mm
• Trademark: S4A
• Origin: China
• HS Code: 8523521000
• Production Capacity: 20000pieces Per Month

Product Description

Readable and Writable Dallas iButton RW1990 Tag
Model No.: RW1990, TM1990A-F5
 

Material	ABS+Stainless steel
Size	Diameter 16.25mm*5.89mm
Thickness	5.89mm
Chip avaible	RW1990 / TM1990A-F5
Function	Read and write (RW1990); Only read (TM1990)
Crafts	Engrave number or texts
Read time	350,000 times
Memory	64 bit
Package	100pcs/box, 5000pcs/carton, 25kg/carton
Feature of iButton Key Touch Memory	Can Be Read in Less Than 5ms
	Operating Range: 2.8V to 6.0V, -40°C to +85°C
Application	Access Control, Inventory Control, Tool Management, Work-in-Progress Tracking
Life Time	10years

 

What is an iButton?
An iButton is a computer chip which is enclosed in a 16mm thick durable weather resistant stainless steel can. Because of their small size and extreme durability, iButtons can travel virtually anywhere.

How does an iButton communicate?
The iButton is a slave device and requires a master to initiate communication to it. A master can be a PC or a micro processor. With the master constantly polling the iButtons, communication to iButtons can be started by a simple touch to a 1-Wire interface called a Blue Dot Receptor. Every iButton has a unique 64-bit serial number, which gives it a unique 1-Wire network address.

What are iButtons being used for?
Attached to key fobs, rings, watches, or other personal items for applications such as access control to buildings and computers. Additionally, iButtons are commonly mounted to storage crates, trucks, and other equipment for asset management. Furthermore, iButtons are mounted to refrigeration units, outdoor environments, and even to animals for various data logging tasks