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Характеристики

there are five colors, normally we will send by random, if need specify the colors, please leave messages to tell us, we will obey to send.

 

RW1990 feature:

 

• 1.RW1990 ibutton

• 2.Low-cost

• 3.water proof

• 4.Rewritable ,DS1990A and TM1990A iButton ,

• 5.can be copy,RW1990

• Technique Parameters:

• America DALLAS encryption

• Breakdown Rate:1/100,000

• Serial Number:Only global 64 bit numbers

• System Logic:64bits pin protection

• Memory:8kb RAM

• Inductive Type: touch

• R/W and encrypt

• R/W times:1,500,000,000

• Working Temperature:-40~85

• Rewritable ibutton RW1990A-F5 read-write type of card, compatible ds1990a.

• Rewritable,DS1990A and TM1990A iButton ,RW1990

• Unique 64-bit registration Number;

• Built-In Multidrop Controller for 1-Wire Net;

• Digital identification by momentary Contact

• This RW1990 chips we use imported one,

• which approved to be reliable performance than others,

• CMOS microcircuit is essentially an electronic carrier of the unique 64-bit digital code.

• The code is stored in the internal nonvolatile memory.

• The data exchange is performed by the protocol 1-Wire,

• which requires one sole data pin and the common pin.

• The microcircuit supports the function of the protocol 1-Wire of ROM search,

• which makes it possible for several devices to operate on one bus.

• This protocol determines the alteration conditions of the bus status

• and the time intervals during synchronization by the synchropulses cuts of the control device.

• Data readout and writing are performed by the junior significant bit forward.

 

Feature

• TM card, also known as touch memory, electronic key

• Stainless steel package with su304#,

• rugged, never rust, corrosion; resistant to heat;

• Anti-variant; sealing strong;

• for security patrol, sauna door locks,electronic door locks,

• door intercom, card systems, identification, banking,

• Communications, rail transportation, transportation, and so many fields

• Information ibutton RW1990 memory 64, can be repeated rubbing, write the diy code

Фото