iButton ds1990a-f5 congtact information button smart card touch memory

TM1990A SPECIAL FEATURES

•TM1990A is fully compatible with DS1990A, DS1990R and i1990A
• Unique 48–bit serial number
• Low-cost electronic key for access control
• 8-bit CRC for checking data integrity
• Can be read in less than 5 ms
•Operating temperature range of -40°C to +85°C

COMMON INFORMATION BUTTON FEATURES
•Unique, factory-lasered and tested 64-bit
•Multi-drop controller for Micro LAN.
•Digital identification by momentary contact.
•Chip-based data carrier compactly stores information.
•Data can be accessed while affixed to an object.
•Economically communicates to bus master with a single digital signal at 16.3k bits per second.
•Standard 16 mm diameter and 1-Wire protocol ensure compatibility with INFORMATION BUTTON family.
•Button shape is self-aligning with cupshaped probes.
•Durable stainless steel case engraved with registration number withstands harsh environments.
•Easily affixed with self-stick adhesive backing, latched by its flange, or locked with a ring pressed onto its rim.
•Presence detector acknowledges when reader first applies voltage

  Zhongshan Jiean Electronic Technology Co., Ltd. was founded in 2000, the company is located in Xiaolan Town, Zhongshan City, Guangdong Province, is a professional commitment to intelligent lock research and development, production, sales, service in one of the high-tech enterprises.

  The company's main products: smart door lock, electronic lock, hotel lock, apartment lock, cabinet lock, smart card, lock cylinder, lock body and other products. It owns more than 50 patents on the core technologies such as product appearance structure and electronic circuit module. Superior geographical environment and rich industrial chain promote the rapid and steady development of SELockey. Its products are sold well at home and abroad, and are well recognized and praised by peers and customers.

     Company strength

• National high and new technology enterprise
• The world has 284 million consumers are using SELOCKEY
• 4062 global distribution agent, including a total of 594 overseas
• Electronic, circuit, module and other more than 50 core technology patents
• Close cooperation between multiple factories
• Our products are exported to more than 20 countries, such as USA, UK, Germany, Spain, Russia, Turkey, Brazil, India, Vietnam, Philippines, Portugal, Thailand, Malaysia, Singapore, etc
• It takes 45 working days for the lock god to produce each lock. The lock is made in strict accordance with the international lock making process of MIN. We dare not cut corners or reduce procedures. A good lock, from the material preparation to the warehouse, the production time is 2 times of the ordinary intelligent lock.