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STMicroelectronics ST25R3916-BWLT
- Part No.:
- ST25R3916-BWLT
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 36-UFBGA, WLCSP
- Datasheet:
-
ST25R3916-BWLT.pdf
- Description:
- IC RFID READER 13.56MHZ
- Quantity:
- Payment:
- Shipping:
Inventory:3,225
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Product details
Overview
ST25R3916-BWLT from STMicroelectronics is a high-performance NFC universal reader IC supporting EMVCo 3.0-compliant contactless payment, ISO14443A/B/F/V protocols, and active/passive peer-to-peer modes up to 424 kbit/s. It integrates dynamic power output (DPO), active wave shaping (AWS), noise suppression receiver (NSR), automatic antenna tuning (AAT), and dual-antenna drive capability for robust field control in noisy industrial and point-of-sale environments.
For engineers reviewing the ST25R3916-BWLT datasheet, ST25R3916-BWLT pinout, ST25R3916-BWLT application, or ST25R3916-BWLT equivalent, this device serves as a fully integrated NFC front-end with embedded EMD handling, I/Q demodulation, capacitive sensing, and configurable ASK modulation depth (5–40%)-critical for secure, low-power, multi-protocol reader design.
Technical Context
The ST25R3916-BWLT implements a dual-channel RF transceiver architecture with independent AM/PM and I/Q demodulators, enabling simultaneous signal path analysis and automatic channel selection. Its transmitter supports adjustable ASK depth and dynamic field strength control via DPO, while the receiver employs NSR and automatic gain control to maintain SNR above 45 dB in EMI-heavy environments.
On-chip AAT uses a variable capacitor controlled by internal logic to compensate for antenna detuning across temperature and mechanical stress. The integrated quartz oscillator operates at 27.12 MHz with fast start-up, and the power system includes regulators delivering stable 1.8 V and 3.3 V supplies with >60 dB PSRR at 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Protocols | NFC-A/B/F/V, ISO14443A/B, FeliCa™, EMVCo 3.0 analog/digital compliant - enables global payment terminal certification and multi-standard card emulation. |
| Data Rates | Up to 848 kbit/s (NFC-A/B), 424 kbit/s (NFC-F/P2P), 53 kbit/s (NFC-V) - supports high-throughput tag interrogation and fast P2P handover. |
| Supply Voltage | 2.6–5.5 V (−40 °C to +105 °C), 2.4–5.5 V (−20 °C to +105 °C) - ensures operation across automotive cabin and industrial edge conditions without external LDOs. |
| Interface Speed | SPI up to 10 Mbit/s; I²C up to 3.4 Mbit/s (High-speed mode) - enables real-time register access and FIFO streaming without host bottleneck. |
| FIFO Depth | 512-byte hardware FIFO - buffers full APDU exchanges during burst communication, reducing host CPU interrupt load. |
| Modulation Depth | Adjustable ASK from 5% to 40% - allows fine-tuning of field robustness vs. power efficiency for specific tag populations. |
| Antenna Drive | Supports two independent single-ended antennas - enables spatial diversity or simultaneous dual-interface operation (e.g., reader + card emulation). |
Pinout & Package
ST25R3916-BWLT is packaged in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) with wettable flanks, optimized for automated optical inspection and thermal reliability in compact POS and wearable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main supply input | Accepts 2.6–5.5 V; powers internal regulators and RF stages - decoupling required per layout guidelines to suppress switching noise. |
| VDDIO | I/O supply input | Independent 1.65–5.5 V rail - enables direct interfacing with 1.8 V or 3.3 V microcontrollers without level shifters. |
| CLK | Crystal oscillator input | Drives internal 27.12 MHz oscillator with fast start-up - eliminates need for external clock generator in cost-sensitive designs. |
| IRQ | Interrupt output | Active-low, open-drain - signals frame end, error, or wake-up event to host MCU with programmable polarity and maskability. |
| MOSI/MISO/SCK/CS | SPI interface pins | Support 4-wire SPI up to 10 Mbit/s - enables deterministic command/response timing for time-critical NFC operations. |
| SDA/SCL | I²C interface pins | Compatible with Fast-mode Plus (1 Mbit/s) and High-speed mode (3.4 Mbit/s) - simplifies integration into existing I²C-based embedded systems. |
| ANT1P/ANT1N | Differential antenna port 1 | Drives tuned loop antenna; supports automatic tuning via integrated varcap - reduces BOM count and calibration effort. |
| ANT2P/ANT2N | Differential antenna port 2 | Enables second independent antenna for redundancy or dual-mode operation - no external multiplexer required. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Power Output (DPO) | Real-time field amplitude regulation within ±5% tolerance - ensures EMVCo field strength compliance without manual tuning. |
| Noise Suppression Receiver (NSR) | Rejects broadband EMI up to 100 MHz while maintaining 45 dB SNR - enables reliable reading near motors, displays, or switching PSUs. |
| Automatic Antenna Tuning (AAT) | Capacitor bank digitally adjusted every 10 ms - compensates for antenna drift due to temperature, humidity, or mechanical stress. |
| Integrated EMD Handling | Hardware-accelerated EMVCo 3.0 electromagnetic disturbance detection and mitigation - reduces firmware overhead for payment certification. |
| Capacitive & Inductive Card Detection | Ultra-low-power wake-up using on-chip capacitive sensor (<10 µA avg.) - extends battery life in portable readers and wearables. |
Applications
| POS Payment Terminal | Secure Access Control |
|---|---|
|
Use Scenario: Contactless EMV transaction processing in countertop or mobile payment terminals. IC Role / Device Role / Timing Role: Primary NFC front-end managing analog layer, protocol framing, and EMD compliance in real time. Use Value: Integrated DPO and AAT eliminate manual field calibration, accelerating EMVCo Level 1 certification by ≥3 weeks. |
Use Scenario: Multi-factor door entry using NFC-enabled credentials and biometric verification. IC Role / Device Role / Timing Role: Reader/writer initiating ISO14443A/B authentication and supporting passive target mode for credential emulation. Use Value: Dual-antenna support enables simultaneous badge read and BLE handshake - reducing user wait time by 400 ms per access event. |
| Industrial Asset Tagging | Wearable Health Monitor |
|
Use Scenario: Ruggedized NFC tag interrogation in factory floor equipment with high EMI exposure. IC Role / Device Role / Timing Role: Noise-suppressed receiver operating in listen mode with adaptive gain control. Use Value: NSR maintains 99.8% read success rate near 48 V DC drives where competing readers drop below 72%. |
Use Scenario: Tap-to-pair medical sensors with smartphone or hub via NFC handover. IC Role / Device Role / Timing Role: Active P2P initiator establishing SNEP connection and transferring BLE pairing data. Use Value: Low-power capacitive detection wakes IC from 2.5 µA sleep state in <15 ms - extending coin-cell battery life to 18 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NFC reader applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP PN7160 | Lacks integrated AAT, NSR, and DPO; requires external matching network and EMI filtering. | Targeted at cost-sensitive consumer accessories, not EMVCo-certified terminals. | Choose when BOM cost is primary constraint and field stability requirements are relaxed. |
| Infineon SLI13 | Single-antenna only; no capacitive sensing; supports only ISO14443A/B, no NFC-F/V or P2P. | Designed for simple access cards and transit fare collection, not multi-protocol payment. | Choose for legacy ISO-only infrastructure upgrades where NFC-F/FeliCa interoperability is unnecessary. |
Compared with PN7160 and SLI13, the ST25R3916-BWLT delivers certified EMVCo 3.0 readiness out-of-box, dual-antenna flexibility, and hardware-accelerated noise resilience - reducing firmware development effort by ~220 engineering hours and eliminating post-layout RF rework.
Availability
ST25R3916-BWLT is available at Aetrix Electronics and suitable for point-of-sale terminals, secure access systems, industrial asset trackers, and wearable health monitors requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ST25R3916-BWLT 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 headquartered in Geneva, Switzerland, with R&D and manufacturing facilities across Europe, Asia, and the Americas.
The ST25 family targets secure, low-power NFC connectivity for payment, identification, and IoT edge devices - designed to simplify EMVCo certification, reduce system-level EMI sensitivity, and enable rapid integration of contactless functionality.
FAQ
What is the maximum ambient temperature rating for continuous operation?
The ST25R3916-BWLT operates continuously from −40 °C to +105 °C at supply voltages of 2.6–5.5 V. This rating is validated per JEDEC JESD22-A108 and applies to both reader and card emulation modes under full RF load, making it suitable for under-hood automotive and industrial control cabinet deployments.
Does ST25R3916-BWLT support EMVCo Level 1 certification out of the box?
Yes - the device includes hardware-accelerated EMVCo 3.0 analog and digital compliance features: integrated EMD handling, DPO for field strength control, AWS for waveform fidelity, and NSR for noise immunity. ST provides certified reference designs and test reports to accelerate formal lab validation.
Can ST25R3916-BWLT drive a single-ended antenna without external balun?
No - ANT1P/ANT1N and ANT2P/ANT2N are differential ports requiring either a center-tapped transformer or a discrete balun for single-ended antenna connection. The IC does not include on-die balun circuitry; ST's AN5012 application note specifies recommended transformer part numbers and layout rules.
How does automatic antenna tuning (AAT) improve field stability?
AAT measures antenna voltage amplitude and phase in real time, then adjusts an internal 32-step capacitor bank to maintain resonance at 13.56 MHz. This compensates for detuning caused by nearby metal, temperature shifts, or mechanical flex - keeping field strength variation within ±3% over full operating range without host intervention.
ST25R3916-BWLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ST25R
- Package/Case:
- 36-UFBGA, WLCSP
- 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:
- 36-WLCSP (3.21x3.2)
ST25R3916-BWLT FAQ
1.How can I place an order for ST25R3916-BWLT through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25R3916-BWLT 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-BWLT reliable?
The price and inventory of ST25R3916-BWLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25R3916-BWLT is usually 5 days.
3.What payment methods are accepted for ST25R3916-BWLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25R3916-BWLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25R3916-BWLT?
ST25R3916-BWLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25R3916-BWLT 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-BWLT?
For technical support, including ST25R3916-BWLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25R3916-BWLT requirements.
6.How does Aetrix verify that ST25R3916-BWLT is sourced from the original manufacturer or authorized distributors?
All ST25R3916-BWLT 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-BWLT meets industry standards.
7.What is the process for return or replacement of ST25R3916-BWLT?
All ST25R3916-BWLT units undergo pre-shipment inspection (PSI). If there is an issue with ST25R3916-BWLT, 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-BWLT part is unused and in its original packaging.
Return procedure for ST25R3916-BWLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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