详细说明
Product Name: Rewritable RFID Touch Memory TM Key RW1990 iButton Copy Card Sauna Key Model NO.: TM card Data Transmission Mode: Serial Frequency: Dallas, Cyfral, Metekom Power Supply Mode: Passive Card Application Field: Access Control System Structure: Read-Write Card Label Category: Passive Read-Write Method: Non-Contact Type Material: ABS Type: Smart Card Function: Identification, Payment, Encrypt/Decrypt, Information Trademark: OEM Transport Package: Each 100PCS in a Box, Each 5000PCS in a Carton Specification: 16.25*5.89MM or customized Origin: China HS Code: 8523521000 Product Description rewritable RFID Touch Memory TM Key RW1990 iButton Copy Card Sauna KeyProducts Description:64 Bit Serial Number iButton/TM1990A-F5 TM Memory Card, TM1990B-F5Rewritable ibutton TM Card in DS1990A-F5, TM1990B-F5, tm01A TM card is similar to a button battery in shape and can be inlaid into a card, key button and other objects.You can replace the data line, address line, control line and power line with a single line so that TM card achieves single line communication through a multi-function device. When the host is powered, TM card gives the response to the host through switching the impedances between 50Ω and 500,000Ω. The lengths of time the signal is pulled down(long or short) show the digital logics(long=1, short=0). Due to the range of witching impedances is 1-10,000, the resistances of the contact points will not affect the identification of the digital signals.According to whether the Memory in TM card is encrypted or not, TM card can be divided into encrypted TM card and non-encrypted TM card.Most of TM cards are non-encrypted.TM1990-F5 card is an encrypted cardwhich is divided into three separate encrypted sectors. Each encrypted sector has its own password and the three sectors can be respectively used for three separate purposes. DS1982 card is programmable.TM card's encrypted method is different from Contactless IC Encrypted cards: The former has 64-bit password without the function of error calculation, while the latter has shorter password and the function of error calculation. If you forget your password by chance, you can reuse your TM card after re-initializing it, but the information in your card will be automatically rewritten.The basic principles of TM cards:A TM card is similar to a button battery in shape and can be inlaid into a card, key button and other objects.You can replace the data line, address line, control line and power line with a single line so that TM card achieves single line communication through a multi-function device. When the host is powered, TM card gives the response to the host through switching the impedances between 50Ω and 500,000Ω. The lengths of time the signal is pulled down(long or short) show the digital logics(long=1, short=0). Due to the range of witching impedances is 1-10,000, the resistances of the contact points will not affect the identification of the digital signals.Company Infomation:
