KTELLTY 50Pcs/Lot Rewritable RFID Contact Memory Key RW1990 IButton for Copy Card Sauna Keys Cards - 750072607

• These RW1990 chips we use an one, which passed reliable performance than others, the CMOS microcircuit is basically a 64-bit single digital code electronic carrier. The microcircuit supports the ROM Search 1-Wire Protocol function, which makes it possible for multiple devices to work on one bus. This Protocol determines the conditions of alteration of the state of the bus and the time intervals during the synchronization by means of the interruptions of -pulses of the control device. The code is stored in internal non-volatile memory. Data exchange is performed by the 1-Wire Protocol, which requires a single data pin and the common pin. The reading and writing of the data are performed by junior thian bit forward.