TM1990A iButton Master Access Control Key, 1-Wire 64-bit ID
Prices updated: 12 Oct 2026
Compare prices
| Store | product | Price | View in store |
|---|---|---|---|
 Makers Electronics | TM1990A iButton Master Access Control Card Readers | 350 EGP | View in store |
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Lowest price recorded: 350 EGP
About this product
The TM1990A is a 1-Wire iButton identification device that stores a unique 64-bit code. It is used in access-control systems as a master identifier, and a compatible contact reader reads the code by touch. It is a common choice for electronic key projects and door access builds.
Specifications
- Interface
- 1-Wire
- Unique ID
- 64-bit
- Type
- Contact iButton identification device
- Application
- Access control master identifier
Frequently asked questions
What is the price of TM1990A iButton Master Access Control Key, 1-Wire 64-bit ID in Egypt?
TM1990A iButton Master Access Control Key, 1-Wire 64-bit ID currently costs 350 EGP in Egypt.
Where can I buy TM1990A iButton Master Access Control Key, 1-Wire 64-bit ID in Egypt?
TM1990A iButton Master Access Control Key, 1-Wire 64-bit ID is available from Makers Electronics. Compare the offers above to find the best price.
How do I read the TM1990A from a microcontroller?
It communicates over a single 1-Wire data line. Connect it with a pull-up resistor (commonly 4.7 kΩ) on the data line, and use a 1-Wire library such as OneWire on Arduino to read the 64-bit ID.
Can a standard RFID reader read this key?
No. The TM1990A is a contact-based iButton, so it needs a touch-type 1-Wire iButton reader. Standard RFID or NFC readers cannot read it.
