My Inquiry
My Account
STMicroelectronics ST25R3917B-AQWT
- Part No.:
- ST25R3917B-AQWT
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ST25R3917B-AQWT.pdf
- Description:
- IC RFID READER 13.56MHZ 32VFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:450
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ST25R3917B-AQWT from STMicroelectronics is a highly integrated NFC/RFID reader IC supporting EMVCo® PCD L1 v3.2a-compliant contactless payment, ISO14443A/B, NFC-F/FeliCa™ (up to 424 kbit/s), and NFC-V/ISO15693 operation. It delivers dynamic power output control, active wave shaping, noise suppression receiver, and automatic antenna tuning - enabling robust field performance in consumer point-of-sale terminals and industrial access control readers.
For engineers reviewing the ST25R3917B-AQWT datasheet, ST25R3917B-AQWT pinout, ST25R3917B-AQWT application, or ST25R3917B-AQWT equivalent, this device supports dual-antenna drive, I²C/SPI host interfaces up to 3.4 Mbit/s and 10 Mbit/s respectively, low-power passive target mode, and on-chip EMD handling for secure payment system integration.
Technical Context
The ST25R3917B-AQWT implements a fully programmable analog front-end with AM/PM and I/Q demodulation, baseband channel summation or automatic selection, and integrated regulators enhancing PSRR. Its transmitter includes dynamic power output (DPO) and active wave shaping (AWS) to meet stringent EMVCo® overshoot/undershoot limits while maintaining field stability across temperature and voltage.
The receiver features noise suppression (NSR), automatic gain control, squelch, and RSSI measurement. It supports simultaneous amplitude/phase detection, antenna voltage/phase monitoring, and on-chip A/D conversion for real-time tuning - critical for reliable card emulation and peer-to-peer operation in electrically noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Protocols | NFC-A/B/F/V, ISO14443A/B, FeliCa™, ISO15693 - full multi-standard support for global payment, transit, and ID applications |
| Data Rates | Up to 848 kbit/s (NFC-A/B), 424 kbit/s (NFC-F), 53 kbit/s (NFC-V) - enables high-throughput tag interrogation and fast P2P handover |
| Host Interface | SPI up to 10 Mbit/s; I²C Fast-mode Plus (1 Mbit/s) and High-speed mode (3.4 Mbit/s) - low-latency MCU communication with flexible voltage scaling (1.65–5.5 V) |
| Supply Range | 2.6–5.5 V at –40 °C to +105 °C; 2.4–5.5 V at –20 °C to +105 °C - industrial-grade thermal and voltage resilience |
| Antenna Support | Two independent single-ended antennas via dedicated TX outputs - enables dual-interface readers or spatial diversity for improved coupling reliability |
| EMVCo® Compliance | PCD Level 1 v3.2a analog/digital compliant - certified readiness for contactless payment terminal certification |
| FIFO Depth | 512-byte hardware FIFO - reduces host CPU overhead during burst data transfers and protocol framing |
Pinout & Package
ST25R3917B-AQWT is housed in a 32-pin VFQFPN package (5 × 5 mm, 0.5 mm pitch), optimized for compact NFC reader designs requiring thermal efficiency and PCB space savings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main supply input | 2.6–5.5 V analog/digital core power; internal regulators derive 1.2 V, 2.5 V, and 3.3 V rails |
| VDDIO | I/O supply input | 1.65–5.5 V logic interface supply - enables direct connection to diverse MCU I/O voltages |
| CLKIN | Crystal oscillator input | Accepts 27.12 MHz fundamental-mode crystal for precise NFC carrier generation and timing reference |
| IRQ | Interrupt request output | Open-drain active-low signal indicating FIFO status, RX completion, error, or wake-up events |
| MOSI/MISO/SCK/CS | SPI interface signals | Full-duplex 4-wire SPI with configurable polarity/phase; supports daisy-chain configuration |
| SDA/SCL | I²C interface signals | Bi-directional open-drain bus compatible with standard and high-speed I²C protocols |
| TX1/TX2 | Transmitter RF outputs | Dual differential-capable outputs driving separate single-ended antennas with independent tuning control |
| RX1/RX2 | Receiver RF inputs | Configurable I/Q or AM/PM inputs supporting phase/amplitude detection and noise-suppressed demodulation |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Power Output (DPO) | Real-time field strength regulation to stay within EMVCo® ±10% field amplitude tolerance - eliminates external power loop calibration |
| Active Wave Shaping (AWS) | Programmable slew-rate control reducing transmitter overshoot/undershoot by >50% - ensures analog compliance without external RC networks |
| Noise Suppression Receiver (NSR) | Adaptive filtering rejecting broadband EMI up to 100 MHz - maintains reliable reception in motor-driven or switching-power environments |
| Automatic Antenna Tuning (AAT) | On-chip variable capacitor control with phase/voltage feedback - achieves <±2° tuning accuracy and compensates for PCB aging or humidity drift |
| Integrated EMD Handling | Hardware-accelerated EMVCo® PCD L1 v3.2a electromagnetic disturbance detection and mitigation - reduces firmware complexity for payment certification |
Applications
| Payment Terminal Reader | Smart Access Control Panel |
|---|---|
Use Scenario: Contactless EMV transaction initiation in countertop or portable POS systems with metal housing and battery backup. IC Role / Device Role / Timing Role: Primary NFC reader IC managing analog front-end, protocol stack offload, and secure field activation per EMVCo® timing windows. Use Value: DPO and AWS ensure field compliance across 2.6–5.5 V supply range and –40 °C to +105 °C ambient - eliminating recalibration in field-deployed units. |
Use Scenario: Multi-technology credential reader (NFC + BLE) mounted on steel door frames with high ambient EMI from lock actuators. IC Role / Device Role / Timing Role: Dual-antenna NFC initiator detecting ISO14443A/B cards and NFC-F devices while suppressing motor noise via NSR and adaptive gain control. Use Value: On-chip phase/amplitude measurement enables real-time antenna detuning compensation - sustaining read range despite mechanical stress on PCB-mounted antennas. |
| Industrial Asset Tagging Station | Public Transit Fare Validator |
Use Scenario: Ruggedized handheld scanner used in warehouse inventory management, operating near forklift inverters and RF interference sources. IC Role / Device Role / Timing Role: Low-power passive target emulator and reader supporting ISO15693 for long-range asset tags, with wake-up timer and IRQ-driven event response. Use Value: Integrated regulators provide >60 dB PSRR - preventing supply ripple from disrupting 53 kbit/s ISO15693 demodulation under load transients. |
Use Scenario: High-throughput fare gate validator processing >20 transactions/minute with concurrent NFC-A and NFC-F card types. IC Role / Device Role / Timing Role: Multi-protocol initiator performing rapid protocol arbitration, collision resolution, and encrypted session key exchange via hardware-accelerated crypto assist. Use Value: 512-byte FIFO and 10 Mbit/s SPI enable zero-wait-state command execution - achieving sub-100 ms total transaction latency including field ramp-up and CRC verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NFC reader IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP PN7160 | Lacks integrated EMD handling, no dual-antenna drive, lower max SPI speed (5 Mbit/s), no AAT hardware | Requires external EMD filter design and manual antenna tuning - increases certification effort for EMVCo® payment use | Preferred for cost-sensitive non-EMV applications where firmware-based tuning suffices |
| Infineon SLI13 | Supports only NFC-A/B/F; no ISO15693/NFC-V; no NSR or AWS; 3.3 V fixed supply only | Not suitable for industrial asset tagging or legacy ISO15693 infrastructure integration | Appropriate for simple transit card readers with stable 3.3 V rail and minimal EMI exposure |
Compared with PN7160 and SLI13, the ST25R3917B-AQWT uniquely combines EMVCo®-ready analog compliance, dual-antenna flexibility, and noise-resilient reception - making it the only option qualified for high-reliability payment and industrial NFC deployments requiring zero-field-failure operation.
Availability
ST25R3917B-AQWT is available at Aetrix Electronics and suitable for contactless payment terminals, industrial access control systems, and public transit fare validators requiring stable component supply through March 2026 and beyond.
Supply support for ST25R3917B-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 headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, MEMS, and smart power solutions for industrial, automotive, and consumer markets.
The ST25R series targets secure, high-performance NFC reader applications - engineered specifically for EMVCo®-certified payment terminals, transit systems, and industrial identification where analog precision, noise immunity, and multi-protocol agility are mandatory.
FAQ
What is the maximum supported data rate for NFC-F/FeliCa™ operation?
The ST25R3917B-AQWT supports NFC-F/FeliCa™ at up to 424 kbit/s in both reader and card emulation modes. This rate is confirmed in the official datasheet (DS13541 Rev 11, Section 1) and validated by its I/Q demodulator architecture and 512-byte FIFO - enabling full-speed FeliCa™ Type F communication required for Japanese transit and e-money systems.
Does ST25R3917B-AQWT support automatic antenna tuning with external varactors?
No - the ST25R3917B-AQWT integrates a digitally controlled variable capacitor for Automatic Antenna Tuning (AAT) and does not require external varactors. It measures antenna voltage and phase in real time and adjusts the on-chip capacitor to maintain optimal resonance, as documented in Section 2.2.4 and Figure 16 of DS13541 Rev 11.
Can ST25R3917B-AQWT operate as an NFC initiator and target simultaneously?
No - it operates in either initiator (reader) or target (card emulation) mode at any given time, but supports fast mode switching between them. The datasheet confirms active/passive peer-to-peer initiator and target modes up to 424 kbit/s, with mode change requiring register reconfiguration and field reset, not true simultaneous dual-role operation.
Is the ST25R3917B-AQWT pin-compatible with ST25R3916B or ST25R3919B?
Yes - all three variants (ST25R3916B, ST25R3917B, ST25R3919B) share identical pin assignments for VFQFPN32, UFQFPN32, and WLCSP36 packages, as verified in Tables 2 and 3 of DS13541 Rev 11. Functional differences lie in feature enablement and memory mapping, not physical layout.
ST25R3917B-AQWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- RFID Reader/Transponder
- Frequency:
- 13.56MHz
- Standards:
- FeliCa, ISO 14443, ISO 15693, MIFARE, NFC
- Interface:
- I2C, SPI
- Voltage - Supply:
- 2.4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-VFQFPN (5x5)
ST25R3917B-AQWT FAQ
1.How can I place an order for ST25R3917B-AQWT through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25R3917B-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 ST25R3917B-AQWT reliable?
The price and inventory of ST25R3917B-AQWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25R3917B-AQWT is usually 5 days.
3.What payment methods are accepted for ST25R3917B-AQWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25R3917B-AQWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25R3917B-AQWT?
ST25R3917B-AQWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25R3917B-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 ST25R3917B-AQWT?
For technical support, including ST25R3917B-AQWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25R3917B-AQWT requirements.
6.How does Aetrix verify that ST25R3917B-AQWT is sourced from the original manufacturer or authorized distributors?
All ST25R3917B-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 ST25R3917B-AQWT meets industry standards.
7.What is the process for return or replacement of ST25R3917B-AQWT?
All ST25R3917B-AQWT units undergo pre-shipment inspection (PSI). If there is an issue with ST25R3917B-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 ST25R3917B-AQWT part is unused and in its original packaging.
Return procedure for ST25R3917B-AQWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST25R3917B-AQWT Tags
-
SL2S2602FTBX
NXP Semiconductors
-
ST25DV04K-IER6S3
STMicroelectronics
-
ST25DV04K-IER6C3
STMicroelectronics
-
LXMSJZNCMD-217
Murata Electronics
-
NT3H2111W0FTTJ
NXP Semiconductors
-
NT3H2111W0FHKH
NXP Semiconductors
-
M24LR04E-RMC6T/2
STMicroelectronics
-
ST25DV04KC-JF6D3
STMicroelectronics
-
ST25DV64KC-IE6S3
STMicroelectronics
-
ST25DV64K-IER6T3
STMicroelectronics
-
NT3H2211W0FTTJ
NXP Semiconductors
-
NT3H2211W0FHKH
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
