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STMicroelectronics ST25R3913-AQFT
- Part No.:
- ST25R3913-AQFT
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ST25R3913-AQFT.pdf
- Description:
- IC RFID READER 13.56MHZ 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,665
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Product details
Overview
ST25R3913-AQFT from STMicroelectronics is a high-performance HF NFC initiator/reader IC designed for payment infrastructure, supporting ISO 14443A/B, ISO 15693, FeliCa™, and ISO 18092 (NFCIP-1) active/passive modes with up to 1 W differential RF output power, 848 kbit/s HBR framing, and inductive wake-up sensing. It integrates dual 1 Ω low-impedance antenna drivers and operates across –40 °C to +125 °C.
For engineers reviewing the ST25R3913-AQFT datasheet, ST25R3913-AQFT pinout, ST25R3913-AQFT application, or ST25R3913-AQFT equivalent, key selection considerations include differential antenna drive capability, automatic modulation index adjustment, AM/PM (I/Q) demodulation, 6 Mbit/s SPI with 96-byte FIFO, and support for Stream/Transparent protocol implementation.
Technical Context
The ST25R3913-AQFT implements a fully integrated analog front end with two independent differential transmitter paths, each capable of driving 1 W into 50 Ω loads, and features dual-path I/Q demodulation with automatic channel selection. Its phase/amplitude detector enables card presence detection via LC tank perturbation measurement without external components.
It embeds a programmable quartz oscillator supporting 13.56 MHz or 27.12 MHz crystals with fast start-up, plus a low-power RC oscillator and wake-up timer for periodic tag detection. The device supports both transparent data streaming and full-framing modes via SPI, enabling MIFARE Classic compliance or custom protocol handling in external microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Output Power | Up to 1 W differential output enables extended read range in noisy environments and robust operation with large or shielded antennas. |
| Data Rates | Supports HBR up to 848 kbit/s PICC↔PCD and PCD↔PICC framing per ISO 14443 and NFCIP-1 standards. |
| Modulation Schemes | AM and PM (I/Q) demodulation channels with automatic selection ensure reliable decoding of diverse tag modulation types. |
| SPI Interface | 6 Mbit/s SPI with 96-byte FIFO reduces host MCU overhead and enables real-time frame processing without packet loss. |
| Supply Voltage | 2.4 V to 5.5 V operation allows direct integration with 3.3 V or 5 V system rails without level-shifting. |
| Operating Temperature | –40 °C to +125 °C rating qualifies for industrial and automotive payment terminal deployments. |
| Antenna Drivers | Dual 1 Ω low-impedance differential drivers support simultaneous or redundant antenna configurations with minimal external components. |
Pinout & Package
ST25R3913-AQFT is housed in a VFQFPN32 package (5 mm × 5 mm, 0.5 mm pitch) with wettable flanks for automated optical inspection and enhanced solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 2.4–5.5 V; powers analog and digital blocks with internal regulators. |
| GND | Ground reference | Common return path for analog/digital sections; requires low-inductance layout for RF stability. |
| ANT1P / ANT1N | Differential antenna output 1 | Drives first antenna with 1 Ω output impedance; supports up to 1 W differential RF power. |
| ANT2P / ANT2N | Differential antenna output 2 | Independent second antenna driver enabling dual-antenna or diversity configurations. |
| SCLK / MOSI / MISO / NSS | SPI interface signals | 6 Mbit/s full-duplex SPI with hardware flow control via NSS; supports daisy-chaining. |
| IRQ | Interrupt request output | Open-drain signal indicating frame reception, error, or wake-up event; configurable polarity. |
| XTAL_IN / XTAL_OUT | Crystal oscillator connection | Supports 13.56 MHz or 27.12 MHz fundamental-mode crystals with fast start-up (< 100 µs). |
Key Features
| Feature | Design Value |
|---|---|
| Inductive wake-up sensing | Enables ultra-low-power standby mode by detecting tag presence via amplitude/phase shift on LC tank-no external sensor required. |
| Automatic modulation index adjustment | Maintains optimal signal integrity across varying antenna Q-factors and load conditions without firmware tuning. |
| User-selectable gain control | Combines automatic and manual AGC modes to optimize SNR in multi-tag or interference-prone environments. |
| Stream and Transparent modes | Offloads framing logic to external MCU while retaining full AFE control-enables MIFARE Classic, DESFire, or proprietary protocols. |
| Oscillator flexibility | Crystal input supports both 13.56 MHz (standard NFC) and 27.12 MHz (dual-band or ETSI-compliant systems) with sub-100 µs start-up. |
Applications
| Payment Terminal Reader | Access Control Panel |
|---|---|
|
Use Scenario: Embedded in countertop or kiosk-based contactless payment terminals requiring PCI PTS v6.0 compliance and high RF immunity. IC Role / Device Role / Timing Role: Acts as primary NFC initiator with dual-antenna support for field uniformity and anti-collision robustness during EMV transaction handshakes. Use Value: 1 W output power ensures reliable reading through thick enclosures or metallic housings; wide temperature range supports uncontrolled retail environments. |
Use Scenario: Integrated into wall-mounted or door-integrated access readers for enterprise or smart building systems. IC Role / Device Role / Timing Role: Functions as ISO 14443A/B reader with fast wake-up and low-power detection to minimize system standby current. Use Value: Inductive sensing and RC wake-up timer reduce average current to < 10 µA, extending battery life in wireless access nodes. |
| Industrial Asset Tagging | Public Transit Fare Validator |
|
Use Scenario: Deployed in factory-floor handheld scanners for metal-tagged tools or pallets under EMI-heavy conditions. IC Role / Device Role / Timing Role: Provides high-bit-rate (848 kbit/s) ISO 15693 reading with adaptive gain to overcome detuning from nearby conductive surfaces. Use Value: Dual 1 Ω antenna drivers allow single-ended antenna drive with external balun or differential drive for maximum coupling efficiency. |
Use Scenario: Used in high-throughput transit validators requiring rapid FeliCa™ or NFCIP-1 P2P transactions at subway gates. IC Role / Device Role / Timing Role: Implements FeliCa™ reader mode with optimized TR1 timing and CRC acceleration for sub-100 ms tap-and-go latency. Use Value: 96-byte SPI FIFO prevents frame overrun during burst reads from multiple cards; HBR support enables fast wallet app handover. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NFC initiator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP PN7160 | Single 50 Ω antenna driver; max 250 mW output; no native HBR > 424 kbit/s; integrated secure element. | Better suited for mobile accessory or low-power consumer devices-not infrastructure-grade. | Select when security certification (e.g., Common Criteria) is mandatory and RF power < 500 mW suffices. |
| Infineon SLI13 | 13.56 MHz only; no 27.12 MHz crystal support; 600 mW max output; lacks dual antenna drivers. | Targeted at cost-sensitive access control; limited for payment-grade field strength or dual-antenna redundancy. | Choose for fixed-frequency, single-antenna designs where BOM cost is prioritized over RF flexibility. |
Compared with PN7160 and SLI13, the ST25R3913-AQFT uniquely delivers 1 W differential output, dual independent antenna drivers, 27.12 MHz oscillator support, and 848 kbit/s HBR-making it the only option qualified for high-reliability, multi-antenna payment infrastructure where field uniformity and noise immunity are critical.
Availability
ST25R3913-AQFT is available at Aetrix Electronics and suitable for payment terminals, access control panels, industrial asset trackers, and public transit validators requiring stable component supply across automotive-grade temperature ranges and long product lifecycles.
Supply support for ST25R3913-AQFT 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, specializing in microcontrollers, power management, sensors, and connectivity ICs for industrial, automotive, and consumer markets.
The ST25R series is ST's dedicated NFC/RFID reader platform targeting infrastructure applications demanding high RF performance, low-power wake-up, and flexible protocol support-including EMVCo, FeliCa™, and ISO-compliant deployments.
FAQ
What antenna topologies does ST25R3913-AQFT support?
The ST25R3913-AQFT supports differential (balanced) antenna drive on both ANT1 and ANT2 pairs, single-ended antenna drive using one differential pair with external balun, and dual-antenna operation in either time-multiplexed or spatial-diversity mode. Its dual 1 Ω drivers eliminate need for external matching networks in most configurations.
Does ST25R3913-AQFT require an external microcontroller to implement MIFARE Classic?
Yes-MIFARE Classic framing must be handled by an external MCU in Stream or Transparent mode, while the ST25R3913-AQFT provides full AFE control, modulation/demodulation, and low-level signal processing. The IC does not embed MIFARE-specific crypto or framing logic.
How does the inductive wake-up feature reduce system power consumption?
The wake-up circuit measures amplitude/phase shift on the antenna LC tank to detect tag proximity without continuous RF carrier transmission. Combined with the internal RC oscillator and wake-up timer, it achieves typical standby current below 10 µA-enabling battery-powered readers with multi-year operation.
Can ST25R3913-AQFT operate with a 27.12 MHz crystal in NFC applications?
Yes-the oscillator input supports both 13.56 MHz and 27.12 MHz fundamental-mode crystals. At 27.12 MHz, the device operates in harmonic mode for NFC applications compliant with regional regulations (e.g., ETSI EN 300 330), maintaining full ISO 14443 and NFCIP-1 functionality.
ST25R3913-AQFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ST25R
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- RFID Reader
- Frequency:
- 13.56MHz
- Standards:
- FeliCa, ISO 14443, MIFARE, NFC
- Interface:
- SPI
- Voltage - Supply:
- 2.4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
ST25R3913-AQFT FAQ
1.How can I place an order for ST25R3913-AQFT through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25R3913-AQFT 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 ST25R3913-AQFT reliable?
The price and inventory of ST25R3913-AQFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25R3913-AQFT is usually 5 days.
3.What payment methods are accepted for ST25R3913-AQFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25R3913-AQFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25R3913-AQFT?
ST25R3913-AQFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25R3913-AQFT 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 ST25R3913-AQFT?
For technical support, including ST25R3913-AQFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25R3913-AQFT requirements.
6.How does Aetrix verify that ST25R3913-AQFT is sourced from the original manufacturer or authorized distributors?
All ST25R3913-AQFT 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 ST25R3913-AQFT meets industry standards.
7.What is the process for return or replacement of ST25R3913-AQFT?
All ST25R3913-AQFT units undergo pre-shipment inspection (PSI). If there is an issue with ST25R3913-AQFT, 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 ST25R3913-AQFT part is unused and in its original packaging.
Return procedure for ST25R3913-AQFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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