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    STMicroelectronics Launches Cost-Efficient NFC Transceivers


    STMicroelectronics introduces near field communication (NFC) transceivers enabling new application areas and easing customer interaction.

    Near-field communication (NFC) transceivers allow communication between two electronic devices in near vicinity. NFC offers low-speed connection with simple setup that can be used to bootstrap more-capable wireless connections. And they are widely used as electronic identity documents and keycards.

    STMicroelectronics launches the ST25R3918, which is a multi-purpose NFC transceiver supporting passive peer-to-peer functionality and NFC card-emulation mode as well as NFC reader operation. It can be used along with near-field tags in a wide range of applications including power tools and personal healthcare devices.

    The ST25R3918 supports NFC-A and NFC-F card emulation, and therefore it can be used as an NFC-A/B (ISO 14443A/B) card reader up to high bit rates, and as an NFC-V (ISO 15693) reader up to 53 kbps, as well as ISO 18092 passive initiator and target.

    One can use their phones to interact easily with applications that utilize the ST25R3918 with a single tap. The device is programmable and simple NDEF data transfers are also permitted. Moreover, the transceiver allows scanning for tags nearby for tasks such as replaceable detection and parameter setting, or simply reading an access card.

    The transceiver features high sensitivity and ST’s Noise Suppression Receiver (NSR) technology, which provides an extended and reliable read range and can be operated with output power around 0.5W in noisy and harsh environments. It also includes a low-power card-detection mode to scan for the presence of a card by measuring the amplitude or phase of the antenna signal. An inbuilt low-power oscillator and wake-up timer reactivates the transceiver after a selected time period to check for the presence of a tag.

    The ST25R3918, moreover, includes support for Dynamic Power Output (DPO), which automatically controls the field strength to meet the required limits. Also an Active Wave Shaping (AWS) feature, that smooths the waveform for better signal integrity.

    Source: electronicsforu.com