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ST25R3920B

STMicroelectronics
Part Number ST25R3920B
Manufacturer STMicroelectronics
Description Automotive NFC reader
Published Mar 6, 2023
Detailed Description ST25R3920B Automotive NFC reader for CCC digital key and car center console Datasheet - production data VFQFPN32 (5 x ...
Datasheet PDF File ST25R3920B PDF File

ST25R3920B
ST25R3920B

Overview
ST25R3920B Automotive NFC reader for CCC digital key and car center console Datasheet - production data VFQFPN32 (5 x 5 mm) Features • AEC-Q100 qualified • Operating modes – Reader/writer – Card emulation – Active and passive peer to peer • RF communication – EMVCo® 3.
1a analog and digital compliant – NFC-A / ISO14443A up to 848 kbit/s – NFC-B / ISO14443B up to 848 kbit/s – NFC-F / FeliCa™ up to 424 kbit/s – NFC-V / ISO15693 up to 53 kb/s – NFC-A / ISO14443A (106 kbit/s) and NFC-F / FeliCa™ (212/424 kbit/s) card emulation – Active and passive peer to peer initiator and target modes, up to 424 kbit/s – Low level modes to implement MIFARE Classic® compliant or other custom protocols • Key features – Dynamic power output (DPO) controls the field strength to stay within given limits – Active wave shaping (AWS) reduces overand under-shoots – Noise suppression receiver (NSR) allows reception in noisy environment – Automatic antenna tuning (AAT) via variable capacitor – Integrated EMVCo® 3.
1a compliant EMD handling – Automatic gain control and squelch feature to maximize SNR – Low power NFC active and passive target modes – Adjustable ASK modulation depth, from 0 to 82% – Integrated regulators to boost system PSRR – AM/PM and I/Q demodulator with baseband channel summation or automatic channel selection – Possibility to drive two independent single ended antennas – Measurement of antenna voltage amplitude and phase, RSSI, on-chip supply and regulated voltages • External communication interfaces – 512-byte FIFO – Serial peripheral interface (SPI) up to 5 Mbit/s – I2C with up to 400 kbit/s in Fast-mode, 1 Mbit/s in Fast-mode Plus, and 3.
4 Mbit/s in High-speed mode • Electrical characteristics – Wide supply voltage and ambient temperature range (2.
6 to 5.
5 V from -40 °C to +105 °C, 2.
4 to 5.
5 V from -20 °C to +105 °C) – Wide peripheral communication supply range, from 1.
65 to 5.
5 V – Quartz oscillator capable of operating with 27.
12 MHz crystal with fast start-up May 2023...


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