ST25R3918-AQFT STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STMicroelectronics ST25R3918-AQFT is a multi-purpose NFC transceiver supporting ISO 14443 A/B, ISO 15693, and NFC Forum modes at 13.56 MHz. It features an integrated power amplifier, receiver, and antenna driver in a compact QFN package. Available from global distributors with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 33
- Lifecycle
- ACTIVE
- Datasheet
- ST25R3918-AQFT Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ST25R3918-AQFT?
- Multi-protocol NFC transceiver supporting ISO 14443 A/B, ISO 15693, and NFC Forum Tag/Reader modes at 13.56 MHz in a single chip
- Integrated power amplifier and antenna matching driver enabling direct connection to small PCB antennas without external active components
- Advanced automatic antenna tuning and active wave shaping for reliable NFC communication over variable antenna configurations and environmental conditions
What is ST25R3918-AQFT used for?
The ST25R3918-AQFT serves as the NFC reader/writer engine in payment terminals, access control readers, and industrial IoT gateways requiring contactless communication with NFC tags and cards. Its multi-protocol support allows a single hardware design to interact with ISO 14443, ISO 15693, and EMV-compliant payment cards, reducing the need for multiple RF front-end chips. The integrated power amplifier and compact QFN package simplify antenna design in handheld POS terminals, smart door locks, and wearable authentication devices.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the ST25R3918-AQFT datasheet?
ST25R3918-AQFT Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ST25R3918-AQFT?
Compatible alternatives and drop-in replacements for ST25R3918-AQFT:
Rfid, Reader, 3.39Mhz To 13.56Mhz Rohs Compliant: Yes |Stmicroelectronics ST25R3918-AQWT
Frequently Asked Questions
Which NFC and RFID protocols does ST25R3918-AQFT support for multi-standard reader designs?
ST25R3918-AQFT supports ISO 14443 Type A and Type B at 13.56 MHz for contactless card communication, ISO 15693 for long-range HF RFID tags, and NFC Forum reader and card emulation modes. This multi-protocol support allows a single device to read contactless payment cards, access badges, and industrial asset tags without swapping hardware, reducing design complexity significantly in multi-standard readers.
Does ST25R3918-AQFT require an external RF power amplifier for PCB antenna designs?
No, ST25R3918-AQFT integrates its own power amplifier and antenna driver directly on-chip, enabling direct connection to a PCB loop antenna tuned to 13.56 MHz without an external active amplification stage. This reduces the external component count to primarily passive matching network elements (capacitors and resistors), shrinking the total BOM and board area for the RF front end in handheld or compact readers.
For a retail POS terminal, what advantage does ST25R3918-AQFT offer over a basic NFC controller lacking EMV support?
ST25R3918-AQFT supports ISO 14443 A/B at data rates up to 848 kbps and is designed for use with EMV-compliant contactless payment flows, whereas basic NFC controllers may lack the timing precision and waveform shaping needed for certification. The integrated active wave shaping ensures RF signal quality meets EMV Level 1 electrical requirements, reducing certification risk and time-to-market for payment-capable POS and kiosk designs.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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