[5 PCS] TM1990A Dallas IButton TM Card with Handle Key Tags

Description

[5 PCS] TM1990A Dallas IButton TM Card with Handle Key Tags
Specifications and Features
Technical
TM 1990A-F5 read only type of card, compatible ds1990a.
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
Description
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.
Terms and Return policy
Change Address
- Orders are being processed within 3 business day. If you are requesting to change your address, please let us know ahead of time. Otherwise, your order will be shipped to the address that you provided in your eBay/PayPal record.
Cancelled Transactions
- We can cancel transactions, just let us know so we can process it immediately. We might provide an RMA number or further instructions if in case the item was already shipped.
Received Wrong Item/Not as Described
- We're humans and we intermittently commit mistakes but we are keen to correct them, in a way that the buyer prefers. If the item received was wrong or not the same as shown in the product listing photos, we will require you to send actual photo/s of the item received, along with its packaging (showing the label on the package). This is our SOP, for us to be certain and for record purposes.
DOA/Damaged Upon Receipt
- We make sure our items are properly packaged before shipping to avoid damages on the item. In case you received a damaged item, which might have been caused by shipping, please send us photos of the received item along with its packaging (showing the label on the package) for us to check and report immediately to our shipping department so they can take further action.
Defective/Incompatible
- We get our items in bulk so there is a little chance that some would be defective. We require you to send us photo/s of the item received and also your original item (for incompatibility issues) so we can compare the items and conduct necessary actions. If you feel like you need to return an item, please let us know the REASON so that we can provide RMA instructions.
Contact us
We can be contacted at any time through eBay messages if you have any questions, comments or product requests. We will respond to you within 24 hours and do our best to help you out! We encourage our customers to contact us with any questions or concerns! We'd like to be sure you are completely satisfied with your purchase.
Payment
We accept PayPal only. But we only Accept your Ebay Address,Please Make sure it's 100% right.
Payment must be received in 5 business days.
Please leave note for your special request (e.g. Colors or Size) in PayPal when you pay the order.
Any special request cannot be accepted after 24 hours of payment, because most of orders will be processed instantly and same day dispatched.
Shipping
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NFC Labs