STMicroelectronics ST25R3916B and ST25R3917B NFC Forum readers

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STMicroelectronics’ ST25R3916B and ST25R3917B NFC Forum readers combine high output power and energy efficiency. Supporting NFC initiator, target, reader and card-emulation modes, they can be used in contactless-payment, device-pairing, wireless-charging, brand protection, and other industrial and consumer applications.

The devices feature active wave shaping (AWS) and flexibility to simplify adjustment of the RF output to optimise overshoot and undershoot. The set-up can be done easily by register settings supported by a graphical tool and quickly validated with an oscilloscope. This eases certification according to EMVCo 3.1a and NFC Forum CR13 specifications without the need to touch the matching of the antenna.

The products deliver up to 1.6 W RF output power and can drive antennas directly at high efficiency. Dynamic power-output (DPO) adjustment enables designers to keep the radiated power between the upper and lower limits defined by EMVCo and the NFC Forum specifications.

Combining a noise-resistant input structure and ST’s noise-suppression receivers (NSR), the devices have high immunity to interference from other nearby equipment such as power supplies and POS terminals. They offer a high level of resistance to both radiated noise and conducted noise.

The ICs offer a wide power-supply voltage range from 2.4 to 5.5 V and operating temperatures from -40 to 105°C. The peripheral I/O circuitry can operate from as little as 1.65 V.

For more information: www.st.com/st25r3916b.