ST25R3920B-AQWT

ST25R3920B-AQWT is an automotive NFC reader for CCC digital key and car centre console. It enables fast development for car access and start applications in areas like door handle or centre console, and enables additional functionality, like pairing or NFC card protection combined with a Qi charger. It has high RF power with dynamic power output to directly drive antennas at high efficiency, achieving large interaction distance even with small antenna sizes. It offers low power card detection by performing a measurement of the amplitude or phase of the antenna signal while reducing power consumption to a minimum. It is widely used in application such as NFC forum compliant NFC universal device, EMVCo 3.1a compliant contactless payment terminal, ISO14443 and ISO15693 compliant general purpose NFC device, FeliCa™ reader / writer, support all five NFC forum tag types in reader mode, support all common proprietary protocols, such as Kovio, CTS, B’ etc.

• Operating supply voltage range is 2.6V to 5.5V
• Operating temperature range is -40°C to 105°C
• Active wave shaping (AWS) reduces over and under-shoots
• Dynamic power output (DPO) controls the field strength to stay within given limits
• Integrated EMVCo® 3.1a compliant EMD handling
• Adjustable ASK modulation depth, from 0 to 82%
• 512-byte FIFO, serial peripheral interface (SPI) upto 5Mbit/s
• Automatic gain control and squelch feature to maximize SNR
• Low power NFC active and passive target modes
• Package style is 32pin VFQFPN (5 x 5mm) with wettable flanks