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STMicroelectronics ST25R3916B-AQET
- Part No.:
- ST25R3916B-AQET
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
ST25R3916B-AQET.pdf
- Description:
- IC RFID READER 13.56MHZ 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,332
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Product details
Overview
ST25R3916B-AQET 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 (53 kbit/s) protocols. It operates in reader/writer, card emulation, and active/passive peer-to-peer modes, with dynamic power output, automatic antenna tuning, and noise-suppression receiver - deployed in point-of-sale terminals, access control readers, and industrial asset tag interrogators.
For engineers reviewing the ST25R3916B-AQET datasheet, ST25R3916B-AQET pinout, ST25R3916B-AQET application, or ST25R3916B-AQET equivalent, key selection considerations include EMVCo® PCD L1 v3.2a analog/digital compliance, dual-antenna support, integrated AAT via variable capacitor, 512-byte FIFO, and operation across –40 °C to +105 °C at 2.6–5.5 V supply.
Technical Context
The ST25R3916B-AQET integrates a fully programmable transmitter with adjustable ASK modulation depth (0–82%), active wave shaping (AWS) for overshoot/undershoot suppression, and dynamic power output (DPO) for field strength regulation. Its receiver features noise suppression (NSR), automatic gain control, squelch, and dual-channel I/Q demodulation with baseband summation or automatic channel selection.
It supports simultaneous RF protocol handling via hardware-accelerated decoding, on-chip phase/amplitude detection, and real-time antenna voltage/phase/RSSI measurement. The embedded quartz oscillator runs at 27.12 MHz with fast startup, and internal regulators improve PSRR while enabling wide peripheral I/O supply range (1.65–5.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Protocols | EMVCo® PCD L1 v3.2a, ISO14443A/B, NFC-F/FeliCa™ (424 kbit/s), NFC-V/ISO15693 (53 kbit/s) |
| Operating Modes | Reader/writer, card emulation (NFC-A/F), active/passive P2P - all with hardware acceleration |
| Communication Interface | SPI up to 10 Mbit/s; I²C Fast-mode Plus (1 Mbit/s) and High-speed mode (3.4 Mbit/s) |
| FIFO Depth | 512-byte hardware FIFO reduces host MCU interrupt load during burst data transfers |
| Supply Range | 2.6–5.5 V over –40 °C to +105 °C; peripheral I/O supply: 1.65–5.5 V |
| Antenna Support | Two independent single-ended antennas with integrated automatic antenna tuning (AAT) |
| Modulation Control | Adjustable ASK depth (0–82%); AM/PM and I/Q demodulation with channel selection |
Pinout & Package
VFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with wettable flanks, RoHS-compliant and halogen-free. Pin mapping validated per STMicroelectronics DS13541 Rev 11, Table 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply | 2.6–5.5 V analog/digital core supply; decoupling required per layout guidelines |
| VDDIO | I/O interface supply | 1.65–5.5 V for SPI/I²C logic level setting; independent of VDD |
| CLK | Crystal oscillator input | Accepts 27.12 MHz fundamental-mode crystal; enables fast-start timing-critical applications |
| ANT1 / ANT2 | RF antenna outputs | Differential-capable single-ended antenna drive; supports two independent antennas |
| IRQ | Interrupt request output | Open-drain, active-low signal indicating FIFO status, RX completion, or error events |
| MOSI / MISO / SCK / NSS | SPI interface signals | Full-duplex 4-wire SPI up to 10 Mbit/s; NSS enables multi-device bus sharing |
| SDA / SCL | I²C bidirectional interface | Supports Fast-mode Plus (1 Mbit/s) and High-speed mode (3.4 Mbit/s) for low-pin-count designs |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Power Output (DPO) | Real-time field strength regulation to meet EMVCo® and regional EMI limits without external feedback loop |
| Noise Suppression Receiver (NSR) | Enables reliable tag detection in electrically noisy environments (e.g., POS terminals near switching power supplies) |
| Automatic Antenna Tuning (AAT) | On-the-fly capacitor adjustment via integrated DAC; compensates for temperature drift and mechanical stress |
| Integrated EMD Handling | Hardware-accelerated EMVCo® PCD L1 v3.2a electromagnetic disturbance mitigation without host CPU overhead |
| Low-Power Target Mode | Sub-100 µA active target current enables battery-powered NFC tag emulation in portable devices |
Applications
| POS Terminal Reader | Industrial Asset Tag Interrogator |
|---|---|
Use Scenario: Contactless payment processing in retail and transit fare collection systems requiring EMVCo® certification. IC Role / Device Role / Timing Role: Primary NFC reader IC implementing PCD L1 v3.2a analog/digital layer with hardware-based EMD handling and field stability control. Use Value: Eliminates need for external field monitoring circuitry and reduces firmware complexity for EMVCo® compliance testing. |
Use Scenario: Reading maintenance logs and calibration data from NFC-enabled industrial sensors in factory automation. IC Role / Device Role / Timing Role: High-reliability ISO15693/NFC-V reader supporting 53 kbit/s in harsh EMI environments with NSR and AAT. Use Value: Maintains read range stability across temperature swings and mechanical vibration due to closed-loop antenna tuning. |
| Secure Access Control Panel | Multi-Protocol Smart Card Emulator |
Use Scenario: Door entry systems using dual-interface credentials (contactless + BLE) with tamper-resistant credential storage. IC Role / Device Role / Timing Role: Card emulation controller for ISO14443A/FeliCa™, supporting secure element interfacing via SPI/I²C. Use Value: Enables simultaneous NFC-A and NFC-F emulation with independent modulation depth control per protocol. |
Use Scenario: Wearable or mobile accessory emulating legacy MIFARE Classic® cards for legacy infrastructure compatibility. IC Role / Device Role / Timing Role: Low-level protocol engine supporting custom MIFARE Classic®-compliant framing and crypto offload coordination. Use Value: Hardware-accelerated low-level mode allows deterministic timing for cryptographic challenge-response sequences. |
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 EMVCo® PCD L1 v3.2a analog compliance; no integrated AAT or DPO; requires external matching network tuning | Suitable for non-EMV payment peripherals (e.g., loyalty readers), not certified POS terminals | Select when cost-sensitive, non-certified NFC reader functionality suffices and board space allows external tuning components |
| Infineon SLI13 | Single-protocol ISO14443A only; no NFC-F/FeliCa™ or NFC-V support; no hardware EMD handling | Limited to basic smart card reading in low-complexity access systems | Choose only for legacy ISO14443A-only deployments where multi-protocol flexibility and EMVCo® certification are unnecessary |
Compared with PN7160 and SLI13, the ST25R3916B-AQET uniquely delivers full EMVCo® PCD L1 v3.2a certification readiness, dual-antenna support, and autonomous antenna tuning - reducing time-to-certification and system-level BOM count in high-integrity payment and industrial applications.
Availability
ST25R3916B-AQET is available at Aetrix Electronics and suitable for point-of-sale terminals, industrial asset tracking systems, and secure access control panels requiring stable component supply through March 2026 and beyond.
Supply support for ST25R3916B-AQET 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 high-assurance NFC reader applications demanding EMVCo® compliance, multi-protocol interoperability, and robust RF performance in thermally and electrically challenging environments.
FAQ
Does ST25R3916B-AQET support EMVCo® PCD L1 v3.2a certification out of the box?
Yes - the ST25R3916B-AQET integrates hardware-level EMVCo® PCD L1 v3.2a analog and digital compliance features including EMD handling, dynamic power output, and active wave shaping. Final certification requires system-level validation with approved test equipment and reference antenna, but the IC meets all mandatory analog/digital layer requirements per DS13541 Rev 11.
What antenna configurations does ST25R3916B-AQET support?
The ST25R3916B-AQET supports two independent single-ended antennas via ANT1 and ANT2 pins, each configurable with dedicated matching networks. It includes integrated automatic antenna tuning (AAT) using an on-chip DAC-driven variable capacitor, enabling real-time compensation for temperature drift, aging, and mechanical stress without external MCU intervention.
Can ST25R3916B-AQET operate in low-power card emulation mode?
Yes - it supports low-power NFC-A and NFC-F card emulation with sub-100 µA active target current consumption. This mode uses integrated passive target memory and hardware-accelerated protocol handling, allowing battery-constrained devices like wearables or smart badges to emulate contactless cards without continuous host processor involvement.
Is external crystal required, and what are the timing specifications?
A 27.12 MHz fundamental-mode crystal is required for precise NFC carrier generation. The integrated oscillator supports fast startup (< 100 µs), critical for listen-mode wake-up and low-latency P2P handshaking. Load capacitance and ESR must comply with DS13541 Rev 11 Section 4.2.5; recommended crystals meet ±10 ppm tolerance and ≤ 40 Ω ESR.
ST25R3916B-AQET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 32-UFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- RFID Reader/Transponder
- Frequency:
- 13.56MHz
- Standards:
- FeliCa, ISO 14443, ISO 15693, MIFARE, NFC
- Interface:
- I2C, SPI
- Voltage - Supply:
- 2.6V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-UFQFPN (5x5)
ST25R3916B-AQET FAQ
1.How can I place an order for ST25R3916B-AQET through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25R3916B-AQET 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 ST25R3916B-AQET reliable?
The price and inventory of ST25R3916B-AQET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25R3916B-AQET is usually 5 days.
3.What payment methods are accepted for ST25R3916B-AQET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25R3916B-AQET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25R3916B-AQET?
ST25R3916B-AQET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25R3916B-AQET 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 ST25R3916B-AQET?
For technical support, including ST25R3916B-AQET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25R3916B-AQET requirements.
6.How does Aetrix verify that ST25R3916B-AQET is sourced from the original manufacturer or authorized distributors?
All ST25R3916B-AQET 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 ST25R3916B-AQET meets industry standards.
7.What is the process for return or replacement of ST25R3916B-AQET?
All ST25R3916B-AQET units undergo pre-shipment inspection (PSI). If there is an issue with ST25R3916B-AQET, 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 ST25R3916B-AQET part is unused and in its original packaging.
Return procedure for ST25R3916B-AQET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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