Cost-reduced multi-purpose NFC transceiver chip
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STMicroelectronics has launched a cost-reduced version of its flagship ST25R3916 NFC reader.
The ST25R3918 enables use cases such as accessory identification for a wide range of applications including power tools and personal healthcare devices where the transceiver interacts seamlessly with NFC tags. Its close relationship to the ST25R3916 simplifies hardware design and certification.
The ST25R3918 supports both FFC-A and NFC-F card emulation and can be used as an NFC-A/B (ISO 14443A/B) card reader up to high bit rates as well as an NFC-V (ISO 15693) reader up to 53 kbps. The card emulation mode allows support for the newest features available on mobile phones.
It can also be used as an ISO 18092 passive initiator and target.
芯片支持设备编程和简单的NDEF数据传输，但它还具有模拟前端（AFE）和框架系统的特殊流和透明模式，以在纸牌阅读器和纸牌宣传模式中实现其他自定义协议。
Combined with the reader mode, the ST25R3918 supports scanning for tags nearby for tasks such as replaceable detection and parameter setting, or simply reading an access card.
ST’s Noise Suppression Receiver (NSR) technology extends the read range and can be operated with output power around 0.5W in noisy and harsh environments. The ST25R3918 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. A low-power RC oscillator and wake-up timer automatically reactivates the ST25R3918 after a selected time period to check for the presence of a tag.
最大化该收发器的性能和价值的其他功能包括对动态功率输出（DPO）的支持，该功率输出自动控制场强以满足所需限制。最重要的是，主动波形（AWS）使波形平滑以获得更好的信号完整性。
The ST25R3918 operates from a wide power-supply voltage range of 2.6V–5.5V between -40°C and 85°C, and 2.4V-5.5V in the temperature range from -20°C to 85°C, with a peripheral-I/O voltage range of 1.65V-5.5V.
现在ST25R3918可用,公关iced at $1.80 in quantities of 1,000 units.
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