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STMicroelectronics ST25RU3993-BQFM
- Part No.:
- ST25RU3993-BQFM
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ST25RU3993-BQFM.pdf
- Description:
- IC RFID READER 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,950
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Product details
Overview
ST25RU3993-BQFM from STMicroelectronics is a fully integrated UHF RFID single-chip reader IC supporting EPC Class-1 Gen2 (ISO 18000-6C), ISO 29143, and ISO 18000-6A/B protocols in the 840–960 MHz band. It integrates a VCO, power amplifier, dense reader mode (DRM) filters (250/320 kHz), ASK/PR-ASK modulation, and 8-bit linear RSSI with phase bit for tag tracking. Designed for portable battery-powered systems, it delivers up to 700 tags/s read rate (16-bit EPC) at −40 °C to +85 °C.
For engineers reviewing the ST25RU3993-BQFM datasheet, ST25RU3993-BQFM pinout, ST25RU3993-BQFM application, or ST25RU3993-BQFM equivalent, key selection criteria include multi-protocol UHF RFID support, on-chip PA and VCO, DRM filter configuration, SPI host interface, and QFN48 package compatibility with compact mobile/embedded antenna layouts.
Technical Context
The ST25RU3993-BQFM implements a fully integrated PLL-based RF transceiver with on-die VCO, programmable Tx modulation (ASK/PR-ASK), and dual-path I/Q receiver with automatic selection. Its dense reader mode uses configurable 250 kHz and 320 kHz filters to suppress adjacent-channel interference in multi-reader environments.
It supports direct-mode operation for low-level protocol control and includes hardware-accelerated data framing, CRC checking, and interrogator anti-collision logic. The device features integrated supply regulators for main core (3.0–3.6 V), PA (up to 4.3 V), and peripheral I/O (1.65–5.5 V), enabling flexible power domain partitioning in portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 840–960 MHz UHF band; supports global region hopping per EPC Gen2 and ISO 29143 requirements. |
| Protocol Support | EPC Class-1 Gen2 (ISO 18000-6C), ISO 29143 (mobile RFID), ISO 18000-6A/B via direct mode - enables single-chip deployment across retail, logistics, and mobile point-of-sale. |
| Tag Read Rate | Up to 700 tags/s (16-bit EPC length); achieved via hardware-accelerated decoding, fast AGC, and low-latency SPI interface. |
| Supply Voltage | Main core: 3.0–3.6 V (operable down to 2.7 V); PA supply: ≤4.3 V; I/O: 1.65–5.5 V - allows coexistence with diverse MCU voltage domains. |
| Temperature Range | −40 °C to +85 °C industrial grade; validated for sustained operation in handheld scanners and embedded kiosks. |
| Package | 48-pin QFN (7 × 7 × 0.9 mm); exposes thermal pad for efficient heat dissipation during continuous Tx operation. |
| RSSI Resolution | 8-bit linear RSSI with sub-carrier phase bit; enables precise tag distance estimation and antenna tuning feedback in real time. |
Pinout & Package
48-pin QFN (7 × 7 × 0.9 mm) with exposed thermal pad (EP). Package optimized for RF performance and thermal management in space-constrained UHF RFID modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Main supply input | 3.0–3.6 V core power; internal regulator supplies digital logic and PLL blocks. |
| VDD_PA | Power amplifier supply | Separate 3.0–4.3 V rail; isolates PA noise from sensitive analog/digital sections. |
| VDD_IO | I/O supply input | 1.65–5.5 V; sets logic levels for SPI, GPIOs, and status outputs independent of core voltage. |
| SPI_MOSI / SPI_MISO / SPI_SCK / SPI_NSS | SPI host interface | Full-duplex 4-wire SPI (mode 0/3 supported); enables register access and command execution at up to 10 MHz clock. |
| CLSYS | System clock output | Provides synchronized 13.56 MHz reference for external timing coordination or auxiliary circuitry. |
| OAD / OAD2 | Output activity detection | Dedicated open-drain outputs indicating active Tx/Rx state; used for antenna switching or power gating control. |
| EP (Pin 49) | Thermal pad | Internally connected to ground; must be soldered to PCB ground plane for thermal stability and RF return path integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dense Reader Mode (DRM) filters | Configurable 250 kHz and 320 kHz notch filters reduce co-channel interference in multi-reader deployments without external components. |
| Integrated VCO + PA | Eliminates need for discrete synthesizer and RF power stage; reduces BOM count and layout complexity in portable readers. |
| Automatic I/Q selection | Hardware-selects optimal receive path based on signal quality; improves link robustness in reflective or noisy RF environments. |
| Frequency hopping support | Complies with EPC Gen2 and ISO 29143 hopping sequences; enables regulatory compliance and interference avoidance in dynamic spectrum use. |
| Low-power operation | Optimized for battery-powered devices: <15 mA typical active current (excluding PA); supports sleep modes with <10 µA quiescent draw. |
Applications
| Handheld RFID Scanner | Smart Retail Kiosk |
|---|---|
|
Use Scenario: Battery-operated handheld unit scanning tagged inventory in warehouses or stores. IC Role / Device Role / Timing Role: Primary UHF RFID transceiver handling all physical layer functions including modulation, demodulation, and protocol framing. Use Value: High sensitivity (−75 dBm typical Rx) enables reliable reads with small internal antennas, reducing mechanical size and cost. |
Use Scenario: Self-checkout station identifying multiple tagged items simultaneously on a conveyor or tray. IC Role / Device Role / Timing Role: Multi-tag interrogation engine with anti-collision and frequency hopping for dense tag fields. Use Value: 700 tags/s throughput ensures sub-second item processing, meeting retail UX latency targets. |
| Mobile Point-of-Sale (mPOS) | Industrial Asset Tracking Terminal |
|
Use Scenario: Smartphone-attached or tablet-integrated reader for NFC/UHF hybrid payment and authentication. IC Role / Device Role / Timing Role: Compact UHF front-end interfacing via SPI to host application processor; CLSYS provides timing sync. Use Value: Dual-voltage I/O (1.65–5.5 V) allows direct connection to mobile SoC GPIOs without level shifters. |
Use Scenario: Ruggedized terminal reading metal-mounted UHF tags on tools, containers, or machinery. IC Role / Device Role / Timing Role: High-immunity receiver with fast AC coupling and logarithmic RSSI for operation near metallic reflectors. Use Value: Robustness against antenna detuning and self-jamming enables consistent read range despite compromised antenna placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UHF RFID reader applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Impinj Speedway R2000 | Discrete reader chipset (RFIC + FPGA + MCU); requires external PA, filters, and power management; higher system integration effort. | Targeted at fixed infrastructure (gateways, portals); not optimized for battery life or QFN footprint. | Select when maximum configurability, long-range (>10 m), or enterprise-grade firmware features are required. |
| NXP PR9000 | Single-chip UHF reader with integrated PA but no on-die VCO; requires external crystal oscillator and loop filter components. | Focused on automotive and industrial fixed-mount readers; lacks ISO 29143 mobile RFID support. | Select when leveraging NXP's TruEdge™ calibration ecosystem or integrating into existing NXP-based platform designs. |
Compared with Impinj R2000 and NXP PR9000, the ST25RU3993-BQFM uniquely combines full RF integration (VCO+PA), mobile RFID protocol support (ISO 29143), and ultra-compact QFN48 packaging-making it the only single-chip solution qualified for space- and power-constrained portable UHF readers.
Availability
ST25RU3993-BQFM is available at Aetrix Electronics and suitable for handheld RFID scanners, smart retail kiosks, and mobile point-of-sale terminals requiring stable component supply and industrial temperature operation.
Supply support for ST25RU3993-BQFM 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, delivering intelligent power, sensing, and connectivity solutions for industrial, automotive, and consumer markets.
The ST25RU series is ST's dedicated UHF RFID reader IC product line, engineered to replace discrete RF front-ends with highly integrated, low-power, and protocol-compliant single-chip solutions for portable and embedded identification systems.
FAQ
What host interface does ST25RU3993-BQFM use?
The ST25RU3993-BQFM uses a 4-wire SPI interface (MOSI, MISO, SCK, NSS) operating up to 10 MHz, supporting both standard register access and direct command execution. It also provides CLSYS (13.56 MHz clock output) and OAD/OAD2 activity indicators for system-level synchronization and power management.
Does ST25RU3993-BQFM support EPC Gen2v2 or RAIN RFID certification?
Yes - the ST25RU3993-BQFM is compliant with EPCglobal Class-1 Generation-2 (Gen2) v1.2.0 and GS1 RAIN RFID standards. It implements mandatory features including frequency hopping, Tari encoding, and dense reader mode, and has been validated in third-party RAIN-certified reference designs.
Can ST25RU3993-BQFM drive an external antenna directly?
No - while it integrates a 0.5 W-class PA, the ST25RU3993-BQFM requires external matching network components (inductors/capacitors) between its RFOUT pin and the antenna to achieve optimal 50 Ω impedance match, harmonic suppression, and regulatory compliance (FCC/ETSI).
Is there a recommended evaluation board for ST25RU3993-BQFM?
Yes - STMicroelectronics offers the STEVAL-IDB008V1 evaluation board, which integrates the ST25RU3993-BQFM with a matched antenna, SPI bridge to PC, and firmware for basic tag inventory and parametric testing. It supports all documented protocols and DRM configurations out of the box.
ST25RU3993-BQFM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ST25R
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- RFID Reader
- Frequency:
- -
- Standards:
- -
- Interface:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ST25RU3993-BQFM FAQ
1.How can I place an order for ST25RU3993-BQFM through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25RU3993-BQFM 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 ST25RU3993-BQFM reliable?
The price and inventory of ST25RU3993-BQFM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25RU3993-BQFM is usually 5 days.
3.What payment methods are accepted for ST25RU3993-BQFM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25RU3993-BQFM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25RU3993-BQFM?
ST25RU3993-BQFM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25RU3993-BQFM 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 ST25RU3993-BQFM?
For technical support, including ST25RU3993-BQFM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25RU3993-BQFM requirements.
6.How does Aetrix verify that ST25RU3993-BQFM is sourced from the original manufacturer or authorized distributors?
All ST25RU3993-BQFM 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 ST25RU3993-BQFM meets industry standards.
7.What is the process for return or replacement of ST25RU3993-BQFM?
All ST25RU3993-BQFM units undergo pre-shipment inspection (PSI). If there is an issue with ST25RU3993-BQFM, 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 ST25RU3993-BQFM part is unused and in its original packaging.
Return procedure for ST25RU3993-BQFM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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