NFC keychains

The "implementation" of NFC tags refers to the physical form in which the tag is produced and used. Here are some common implementations and their applications:

Bracelet
NFC tags in the form of a bracelet are useful for applications such as event registration, access control and payment systems.

Coins
These are round NFC tags commonly used for contactless payments, access control and loyalty programs.

Display
NFC tags with a built-in display can show dynamic information, such as balances, promotions or temporary codes, and are often used in interactive marketing or access management.

Card
NFC tags in the form of a card are ideal for access control, identification and payment systems, similar to credit cards.

Keychain
NFC tags in the form of a keychain are useful for personal identification, access control and loyalty programs.

Sticker
NFC stickers can be attached to objects such as products, posters or packaging for interactive marketing, product authentication and information applications.

Tags
This is a general term that refers to NFC tags in various shapes and sizes, which are used for a wide range of applications, from inventory management to smart devices.

Choosing the right version depends on the specific usage scenarios, requirements for durability and ease of use in different environments.

ABS
A tough and durable plastic that resists wear well, often used for rugged NFC tags.

Epoxy
A clear, resinous coating that protects NFC tags from moisture and mechanical damage, making them suitable for outdoor environments.

FPC (Flexible Printed Circuit Board).
A flexible circuit board that allows NFC tags to be integrated into curved or complex shapes, such as smart cards.

Coated paper
Paper coated with a protective layer, ideal for cost-effective NFC tags such as labels and cards.

PPS
A durable and heat-resistant polymer suitable for NFC tags exposed to high temperatures.

PVC
A widely used material because of its flexibility and resistance to chemicals, often used for NFC cards and tags.

Silicone
Flexible and water-resistant material that protects NFC tags from extreme environmental conditions, such as in industrial applications.

Wood / Metal
Unique, luxurious look. Often chosen for premium applications.

NFC tags have a certain amount of storage space, expressed in bytes, known as "capacity." This capacity determines how much data the tag can store. This can range from small amounts, suitable for simple data such as URLs or short text, to larger amounts that can hold more complex information. When choosing an NFC tag, it is important to consider the required capacity to ensure that all the desired information will fit on the tag.

The chip type refers to the technology and frequency at which the tag operates. Different chip types have different applications and properties:

125 kHz
This frequency is often used for simple applications such as access control and identification. It has limited reading distance and data capacity.

• T5577
  A programmable 125 kHz chip compatible with multiple protocols. Commonly used for access control where flexibility is required.

• EM4200
  A widely used passive 125 kHz fixed ID chip ideal for simple identification applications.

• TK4100
  An inexpensive and popular 125 kHz alternative for simple RFID systems such as key fobs or cards.

13.56 MHz - NFC / HF
This frequency is used for smart applications such as NFC, access control and contactless payments. The tags operate at short range and provide reliable communication with smartphones and other readers.

• MIFARE Classic 1K
  This type operates at 13.56 MHz and offers larger storage capacity (1 kilobyte) and better security features. It is often used in public transportation, access control and loyalty programs.

• NTAG213
  One of the most widely used NFC chips with 180 bytes of memory (NDEF: 137 bytes). Suitable for URLs, contact information or small actions via smartphones.

• NTAG215
  Has more memory than the NTAG213 (540 bytes, NDEF: 492 bytes). Popular with Amiibo and other applications that require a little more space, among others.

• NTAG216
  The version with the most memory within the NTAG family (924 bytes, NDEF: 888 bytes). Perfect for more complex applications.

• NTAG424 (NTAG424 DNA)
  Advanced chip with high security (AES-128 encryption) and extensive functions. Commonly used for authentication of products and secure applications.

• MIFARE Ultralight
  Low-cost, low-capacity chip ideal for one-time tickets or low-cost applications.

• MIFARE Ultralight C
  Variant with additional security via 3DES authentication. Suitable for simple applications with increased security.

• MIFARE DESFire EV3 2K / 4K / 8K
  Advanced chips with 2, 4 and 8 kilobytes of memory respectively, optimized for complex security and data structures. Widely used in public transportation, access management and government applications.

• MIFARE DESFire EV3 (general).
  Is known for its high security, fast transactions and versatility. Often used in conjunction with mobile access systems or smart cities.

• HITAG 2
  A versatile chip with good security and read/write functionality. Applied in vehicle identification, industrial systems and access control.

UHF 860-960 MHz
Ultra High Frequency (UHF) tags have a much greater reading distance and can read multiple tags simultaneously. They are often used in logistics, inventory control and other applications where fast and bulk reading is required.

Conclusion
Choosing the right chip type depends on the specific requirements of the application and the environment in which the tags will be used. Consider reading distance, storage capacity, security and compatibility with existing systems. At NFC World, we are happy to help you make the right choice.