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RFID tag 4x4 mm with built-in antenna

09.05.2016

The new NFC transponder chip is one of the world's smallest RFID tags with an integrated antenna. The RF37S114 is a full fledged 13.56MHz transponder compliant with NFC Tag Type 5 ISO/IEC 15693 and ISO/IEC 18000-3 (Mode 1) standards.

On a chip measuring only 4x4 mm, a loop antenna is placed, which, despite its miniature size, allows you to read data at a distance of at least 5 mm. The chip can be used for product identification, supply chain management, inventory control and other applications. Depending on the type of reader and its antenna, up to 50 RF37S114 tags can be read in one second.

RF37S114 feature is the absence of pins for soldering - the work goes through the antenna placed directly on the chip body. The chip has a unique 64-bit immutable ID and 256 bits of user-rewritable memory. Access to the built-in user memory is carried out using a reader at a frequency of 13.56 MHz. The memory is organized in 8 blocks of 32 bits. For each user block, there is a separate protection bit, when set, further overwriting of data becomes impossible.

As a reader, you can use the TRF797x series chips (Article on TI RFID solutions). When using the TRF7970A reader chip and an antenna of 5 turns of wire with an external size of 20x20 mm, the tag reading range was 1,6 cm. The guaranteed data storage period is 10 years, the number of rewriting cycles is at least 100 thousand. The operating temperature range of the microcircuit is -20 ... + 70 ° C, the case size is 4 mm x 4 mm x 0.66 mm + -0,1 mm.

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