Ntcpefy 10Pcs/Lot Rewritable RFID Memory Key RW1990 IButton for Copy Card Cards

• The microcircuit supports the Search 1-Wire Protocol function, which makes it possible for multiple devices to work on one bus.
• 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.
• These RW1990 we use an one, which passed performance than others, the CMOS microcircuit is basically a 64-bit single code electronic .
• 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 and writing of the data are performed by thian bit forward.

Ntcpefy Chip Type: RW1990 1 RW1990 ibutton 2. Water resistant 3. Rewritable, DS1990A and TM1990A iButton, 4. Can be copied, RW1990 Technique parameters: America encryption Failure rate: 1 / 100,000 Memory: 8KB RAM Inductive type: Contact R / W and encrypt R / W times: 1,500,000,000 Operating temperature: -40 ~ 85 Lifespan: more than 20 years Rewritable button RW1990A-F5 Read-write card, compatible with ds1990a. Rewritable, DS1990A and TM1990A iButton, RW1990 64-bit unique record number; Integrated Multidrop controller for 1-wire network; identification by momentary contact TM card, also known as Contact memory, electronic ke3.5y Stainless steel package with su304 #, Resistant, never rust, Corrosion; Heat-resistant; Anti-variant; Strong sealing; For security patrol, sauna door locks, electronic door locks, Door intercom, card systems, identification, banking, Communications, rail transportation, transportation and many fields color: random colors, don't accept the specified color Material: plastic size: 16.25x5.89mm Package Contents: 10 x RFID Contact Memory Key Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.