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ST25R3920

STMicroelectronics
Part Number ST25R3920
Manufacturer STMicroelectronics
Description Automotive high performance NFC reader
Published Mar 6, 2023
Detailed Description ST25R3920 Automotive high performance NFC reader for CCC digital key and car center console Datasheet - production data...
Datasheet PDF File ST25R3920 PDF File

ST25R3920
ST25R3920

Overview
ST25R3920 Automotive high performance NFC reader for CCC digital key and car center console Datasheet - production data VFQFPN32 (5x5 mm) Features • AEC-Q100 qualified • Operating modes – Reader/writer – Card emulation – Active and passive peer to peer • RF communication – EMVCo 3.
0 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 and NFC-F / FeliCa™ 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.
0 compliant EMD handling – Automatic gain control and squelch feature to maximize SNR – Low power capacitive and inductive card detection – Low power NFC active and passive target modes – Adjustable ASK modulation depth, from 5 to 40% – 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 crys...


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