The ST25R3910 is a high performance 13.56 MHz RFID reader, with two differential, low impedance (1.5 Ohm) antenna drivers.
These drivers are unmatched, allowing the ST25R3910 to deliver up to eight times the output power of a standard HF reader IC using the same power supply voltage, and reducing in half the power consumption at the same output power.
The ST25R3910 can operate already at 2.4 V, with a low power operating mode of 5 mA, making it perfectly suited for portable or battery-powered applications.
For applications where high power is required the ST25R3910 can deliver up to 700 mW, thus avoiding the need for complex external booster circuitry.
The component count and complexity of the design is further reduced through automatic modulation depth adjustment.
The analog front end (AFE) is complemented by a highly integrated data framing engine for both ISO-14443 A and B. This includes data rates up to 848 kbit/s, with all framing and synchronization tasks on board. This enables to build a complete HF RFID reader using only a low end MCU.
The ST25R3910 supports reader to tag and Peer to Peer communication using the NFCIP-1 active communication mode with a 106 kbps data rate. Other standard and custom protocols, such as ISO-15693 or FeliCa™ can be implemented via transparent mode. The ST25R3910 features a SPI, which enables bi-directional communication with the external microcontroller.
The ST25R3910 also features the Automatic Antenna Tuning (AAT) technology, enabling the reader to re tune itself to deliver maximum output at 13.56 MHz, when the surroundings detune the antenna.
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|AN4974: Antenna matching for ST25R3911B/ST25R391x devices||2.0||3 MB|
|AN5043: Layout recommendations for the design of boards with ST25R3911B/ST25R391x devices||4.0||873 KB|
|ST25R series overview||1.0||3 MB|
|High performance NFC/RFID readers||1.0||981 KB|
|NFC solutions from ST||1.0||3 MB|
|Part Number||Package||Packing Type||Marketing Status||Unit Price (US$) *||Quantity||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|ST25R3910-BQFM||VFQFPN 32 5x5x1.0||Tape And Reel||Active : Product is in volume production||-||-||NEC||EAR99||-||MORE INFO||DISTRIBUTOR AVAILABILITY|
|ST25R3910-BQFT||VFQFPN 32 5x5x1.0||Tape And Reel||NRND : Not Recommended for New Design. Product is in volume production only to support customers ongoing production.||2.5||1000||NEC||EAR99||-||MORE INFO||DISTRIBUTOR AVAILABILITY|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
|ST25R3910-BQFM||Active||VFQFPN 32 5x5x1.0||Industrial||N/A|
|ST25R3910-BQFT||NRND||VFQFPN 32 5x5x1.0||Industrial||N/A|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.