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STMicroelectronics ST25R3916-AQWT
- Part No.:
- ST25R3916-AQWT
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ST25R3916-AQWT.pdf
- Description:
- IC RFID READER/TRANSP 32VFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,168
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Product details
Overview
ST25R3916-AQWT from STMicroelectronics is a high-performance NFC universal reader IC supporting EMVCo 3.0-compliant contactless transactions, ISO14443A/B/F/V protocols up to 848 kbit/s, and dual-mode card emulation and peer-to-peer operation. It integrates dynamic power output (DPO), active wave shaping (AWS), noise suppression receiver (NSR), automatic antenna tuning (AAT), and on-chip regulators for robust operation in noisy industrial and payment terminal environments.
For engineers reviewing the ST25R3916-AQWT datasheet, ST25R3916-AQWT pinout, ST25R3916-AQWT application, or ST25R3916-AQWT equivalent, this device delivers verified EMVCo 3.0 analog/digital compliance, real-time antenna voltage/phase measurement, capacitive sensing, and dual-antenna drive capability - critical for secure, low-power, multi-protocol NFC reader design.
Technical Context
The ST25R3916-AQWT implements a fully integrated RF front-end with AM/PM and I/Q demodulation, baseband channel summation or automatic selection, and configurable TX encoding/ RX decoding logic. Its transmitter supports adjustable ASK modulation depth (5–40%) and dynamic field strength control via DPO and AWS circuits.
The receiver features NSR, automatic gain control, squelch, and low-power detection modes. Integrated AAT uses variable capacitance tuning, while the phase/amplitude detector enables real-time antenna impedance monitoring - essential for maintaining stable coupling across varying card distances and environmental conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Protocols | NFC-A/B/F/V, ISO14443A/B, FeliCa™, EMVCo 3.0 analog & digital compliant |
| Data Rates | Up to 848 kbit/s (NFC-A/B), 424 kbit/s (NFC-F/P2P), 53 kbit/s (NFC-V) |
| Supply Voltage | 2.6–5.5 V (−40 °C to +105 °C); peripheral I/O: 1.65–5.5 V |
| Interface Speed | SPI up to 10 Mbit/s; I²C up to 3.4 Mbit/s (High-speed mode) |
| FIFO Depth | 512-byte hardware FIFO for burst data handling without host latency |
| Modulation Control | Adjustable ASK depth (5–40%); AM/PM and I/Q demodulation with channel selection |
| Antenna Support | Two independent single-ended antennas; on-chip voltage/phase/RSSI measurement |
Pinout & Package
ST25R3916-AQWT is housed in a VFQFPN32 package (5 × 5 mm, 0.5 mm pitch), optimized for compact NFC reader modules requiring thermal efficiency and PCB space savings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main supply input | 2.6–5.5 V power rail; powers core, RF, and regulators |
| VDDIO | I/O supply input | 1.65–5.5 V rail for SPI/I²C interface level translation |
| CLK | Crystal oscillator input | Accepts 27.12 MHz crystal; fast start-up for low-latency wake-up |
| IRQ | Interrupt output | Open-drain signal indicating FIFO full, RX ready, error, or timer expiry |
| MOSI/MISO/SCK/CS | SPI interface lines | Full-duplex 4-wire SPI up to 10 Mbit/s; supports daisy-chain configuration |
| SDA/SCL | I²C interface lines | Compatible with Fast-mode Plus (1 Mbit/s) and High-speed mode (3.4 Mbit/s) |
| ANT1P/ANT1N | Differential antenna port 1 | Drives external matching network; supports active/passive target modes |
| ANT2P/ANT2N | Differential antenna port 2 | Enables dual-antenna operation for spatial diversity or extended read range |
| VCAP | Variable capacitor control | Analog voltage output for AAT tuning of external varactor diode |
| PHASE/AMP | Phase & amplitude monitor outputs | ADC-measured antenna voltage phase and amplitude for real-time tuning feedback |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Power Output (DPO) | Real-time field strength regulation to meet EMVCo 3.0 magnetic field limits without external loop control |
| Noise Suppression Receiver (NSR) | Enables reliable communication in electrically noisy environments (e.g., point-of-sale terminals near switching PSUs) |
| Automatic Antenna Tuning (AAT) | On-the-fly impedance matching using external varactor; eliminates manual calibration during production |
| Capacitive Card Detection | Low-power wake-up via integrated capacitive sensor - reduces system standby current to sub-µA levels |
| EMVCo 3.0 EMD Handling | Integrated analog/digital EMD detection and mitigation logic compliant with EMVCo 3.0 specification |
Applications
| Payment Terminal Reader | Secure Access Control System |
|---|---|
|
Use Scenario: Contactless EMVCo 3.0 transaction processing in countertop or portable POS terminals. IC Role / Device Role / Timing Role: Primary NFC reader controller managing analog front-end, protocol stack offload, and secure host handoff. Use Value: DPO and NSR ensure field stability and read reliability under EMI stress; AAT maintains coupling across temperature drift and mechanical wear. |
Use Scenario: Multi-factor credential validation at building entry points using NFC cards or smartphones. IC Role / Device Role / Timing Role: Initiator in ISO14443A/B reader mode with fast card presence detection and low-latency response. Use Value: Capacitive card detection enables instant wake-up from ultra-low-power state; dual-antenna support extends read range for hands-free access. |
| Industrial Asset Tag Reader | Smart Healthcare Device Pairing |
|
Use Scenario: Rugged handheld readers scanning NFC tags on machinery, tools, or medical equipment in factory settings. IC Role / Device Role / Timing Role: Robust initiator supporting NFC-V (ISO15693) for long-range tag interrogation up to 1.5 m. Use Value: Wide −40 °C to +105 °C operating range and integrated regulators ensure stable performance in uncontrolled ambient conditions. |
Use Scenario: Secure Bluetooth pairing initiation between NFC-enabled wearables and diagnostic instruments. IC Role / Device Role / Timing Role: Passive P2P target initiating secure session key exchange via NFCIP-1 handshake. Use Value: Low-power passive target mode and on-chip EMD handling enable certified, battery-efficient pairing without host CPU involvement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NFC reader applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PN5180A0HN/C1 | Lacks integrated capacitive sensor and AAT; requires external tuning components; no EMVCo 3.0 EMD handling | Better suited for cost-sensitive consumer readers where EMVCo certification is not required | Select when lower BOM cost outweighs need for autonomous tuning and payment-grade EMD compliance |
| TRF7970A | Supports only ISO14443A/B/F; no NFC-V or EMVCo 3.0 compliance; older architecture with higher power consumption | Legacy industrial readers needing basic NFC-A/B support without security or multi-protocol flexibility | Choose only for migration from existing TRF7970A designs; not recommended for new EMVCo or NFC-V deployments |
Compared with PN5180A0HN/C1 and TRF7970A, the ST25R3916-AQWT uniquely combines EMVCo 3.0 certification, integrated AAT, capacitive wake-up, and dual-antenna support - enabling next-generation readers that reduce calibration overhead, extend battery life, and meet global payment security mandates.
Availability
ST25R3916-AQWT is available at Aetrix Electronics and suitable for payment terminals, secure access systems, industrial asset tracking, and smart healthcare devices requiring stable component supply, long-term lifecycle assurance, and full EMVCo 3.0 qualification support.
Supply support for ST25R3916-AQWT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader specializing in microcontrollers, analog ICs, and secure connectivity solutions for industrial, automotive, and consumer markets.
The ST25R series targets high-reliability NFC reader applications demanding EMVCo certification, multi-protocol interoperability, and autonomous RF tuning - directly addressing the needs of payment infrastructure and secure identity systems.
FAQ
What is the maximum supported data rate for ISO14443A communication?
The ST25R3916-AQWT supports ISO14443A at up to 848 kbit/s in both reader/writer and card emulation modes. This high-speed capability enables rapid transaction processing in EMVCo-certified payment terminals and reduces user wait time during contactless payments.
Does ST25R3916-AQWT require an external crystal oscillator?
Yes - it requires a 27.12 MHz crystal connected to the CLK pin. The internal oscillator supports fast start-up (<100 µs), enabling rapid wake-up from low-power states without compromising system responsiveness during card detection events.
How does Automatic Antenna Tuning (AAT) function in practice?
AAT uses the VCAP pin to drive an external varactor diode, dynamically adjusting antenna resonance based on real-time phase and amplitude measurements. This compensates for detuning caused by nearby metal, temperature shifts, or mechanical stress - eliminating manual calibration in production.
Can ST25R3916-AQWT operate as both initiator and target simultaneously?
No - it operates in either initiator (reader) or target (card emulation/P2P target) mode at any given time, but supports fast mode switching via register commands. Simultaneous dual-role operation is not supported; however, P2P initiator/target handshaking is fully implemented per NFCIP-1.
ST25R3916-AQWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ST25R
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- RFID Reader/Transponder
- Frequency:
- -
- Standards:
- FeliCa, ISO 14443, ISO 15693, MIFARE, NFC
- Interface:
- I2C, SPI
- Voltage - Supply:
- 2.4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VFQFPN (5x5)
ST25R3916-AQWT FAQ
1.How can I place an order for ST25R3916-AQWT through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25R3916-AQWT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ST25R3916-AQWT reliable?
The price and inventory of ST25R3916-AQWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25R3916-AQWT is usually 5 days.
3.What payment methods are accepted for ST25R3916-AQWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25R3916-AQWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25R3916-AQWT?
ST25R3916-AQWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25R3916-AQWT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ST25R3916-AQWT?
For technical support, including ST25R3916-AQWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25R3916-AQWT requirements.
6.How does Aetrix verify that ST25R3916-AQWT is sourced from the original manufacturer or authorized distributors?
All ST25R3916-AQWT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ST25R3916-AQWT meets industry standards.
7.What is the process for return or replacement of ST25R3916-AQWT?
All ST25R3916-AQWT units undergo pre-shipment inspection (PSI). If there is an issue with ST25R3916-AQWT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ST25R3916-AQWT part is unused and in its original packaging.
Return procedure for ST25R3916-AQWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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