Specification	ST25R3914-AQWT

Frequency	13.56 MHz
Grade	Automotive
Interface	SPI
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 C
Package / Case	32-VFQFN Exposed Pad
Qualification	AEC-Q100
Standards	Mifare, FeliCa, ISO 14443, ISO 18092, ISO 15693, NFC
Supplier Device Package	32-QFN (5x5)
Type	RFID Reader
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.4 V

ST25R3914 Series

Automotive high performance HF reader / NFC initiator with 1 W output power supporting AAT

Part	Qualification	Mounting Type	Standards	Interface	Supplier Device Package	Type	Frequency	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Grade
STMicroelectronics ST25R3914-AQWT	AEC-Q100	Surface Mount	FeliCa ISO 14443 ISO 15693 ISO 18092 Mifare NFC	SPI	32-QFN (5x5)	RFID Reader	13.56 MHz	5.5 V	2.4 V	32-VFQFN Exposed Pad	85 °C	-40 C	Automotive

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	N/A	3750	$ 5.47
Mouser	N/A	4000	$ 3.03
Newark	Each (Supplied on Cut Tape)	1	$ 4.11
		1	$ 4.11

Description

General part information

ST25R3914 Series

The ST25R3914/5 are highly integrated NFC initiators / HF reader ICs for automotive applications, AEC-Q100 grade 1 qualified, including the analog front end (AFE) and a highly integrated data framing system for ISO 18092 (NFCIP-1) initiator, ISO 18092 (NFCIP-1) active target, ISO 14443A and B reader (including high bit rates), ISO 15693 reader and FeliCa™ reader. Implementation of other standard and custom protocols like MIFARE™ Classic is possible using the AFE and implementing framing in the external microcontroller (Stream and Transparent modes).

The ST25R3914/5 are positioned perfectly for the infrastructure side of the NFC system, where users need optimal RF performance and flexibility combined with low power.

Thanks to automatic antenna tuning (AAT) technology, the devices are optimized for applications with directly driven antennas. The ST25R3914/5 are alone in the domain of HF reader ICs as they contain two differential low impedance (1 Ohm) antenna drivers.