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STMicroelectronics ST25RU3980-BQFT
- Part No.:
- ST25RU3980-BQFT
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ST25RU3980-BQFT.pdf
- Description:
- IC RFID READER 860-960MHZ 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:345
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Product details
Overview
ST25RU3980-BQFT from ams OSRAM is a UHF RFID reader IC operating at 860–960 MHz, supporting EPCglobal Gen2v2 and ISO/IEC 18000-63 protocols. It integrates a 3.3 V analog front-end, digital baseband processor, and embedded firmware for tag inventory, read/write, and anti-collision. Key specs include ±1 dB amplitude accuracy, 40 dBm output power, and integrated RSSI measurement - deployed in industrial asset tracking and logistics gate readers.
For engineers reviewing the ST25RU3980-BQFT datasheet, ST25RU3980-BQFT pinout, ST25RU3980-BQFT application, or ST25RU3980-BQFT equivalent, key selection considerations include its Gen2v2 protocol compliance, integrated PA bias control, on-chip temperature sensor, and support for external MCU via SPI/I²C with interrupt signaling.
Technical Context
The ST25RU3980-BQFT implements a fully integrated UHF RFID reader transceiver with dual-path receive architecture for simultaneous signal sampling and phase calibration. Its digital baseband includes hardware-accelerated Gen2v2 command parsing, CRC generation/verification, and adaptive Q-algorithm execution.
It supports programmable modulation depth (8%–100%), adjustable Tari (6.25–40 μs), and real-time RSSI-based tag dwell time optimization. The IC features internal DC offset cancellation and automatic gain control calibrated across temperature and frequency bands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 860–960 MHz - covers all regional UHF ISM bands without external tuning components. |
| Output Power | +40 dBm - enables >10 m read range with standard linearly polarized antennas in open-field conditions. |
| Protocol Support | EPCglobal Gen2v2 & ISO/IEC 18000-63 - ensures interoperability with global tag ecosystems and advanced security features like tag authentication. |
| RSSI Resolution | 0.5 dB step size - allows precise tag location estimation and multi-reader interference detection. |
| Supply Voltage | 3.3 V ±5% - compatible with standard industrial logic rails and eliminates need for additional LDOs. |
| Interface | SPI + I²C + GPIO interrupt - enables flexible host integration with low-latency event notification for real-time inventory cycles. |
Pinout & Package
ST25RU3980-BQFT is housed in a 5 mm × 5 mm, 32-pin QFN package with exposed thermal pad (EP) for enhanced RF stability and thermal dissipation in continuous transmit operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | 3.3 V rail for RF front-end; requires local 100 nF + 10 μF decoupling to suppress switching noise. |
| VDDD | Digital supply input | 3.3 V rail for baseband logic; separate from VDDA to minimize digital coupling into RF path. |
| RFOUT | Transmit RF output | Differential 50 Ω output driving external balun; supports +40 dBm with integrated PA bias control. |
| RFINP/RFINN | Differential receive input | High-IP3, 50 Ω differential input pair enabling simultaneous tag response capture without external LNAs. |
| IRQ | Interrupt output | Active-low open-drain signal indicating completion of command execution or error condition. |
| SCLK/MOSI/MISO/SS | SPI interface pins | Supports up to 10 MHz clock; MISO includes tri-state control for multi-device bus sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Gen2v2 Protocol Engine | Hardware-accelerated command execution reduces host MCU overhead by >70% vs software-only implementations. |
| Integrated Temperature Sensor | ±2°C accuracy over –40°C to +85°C enables real-time PA bias compensation and thermal derating. |
| Dual-Path Receive Architecture | Enables simultaneous signal acquisition and reference channel calibration for stable demodulation under multipath. |
| On-Chip RSSI Measurement | Per-tag RSSI reported with 0.5 dB resolution and <10 μs latency - critical for directional antenna steering algorithms. |
Applications
| Industrial Asset Tracking | Logistics Gate Reader |
|---|---|
Use Scenario: Real-time identification of pallets, containers, and tools entering/exiting factory zones. IC Role / Device Role / Timing Role: UHF RFID reader IC performing high-speed Gen2v2 inventory with adaptive Q-algorithm and RSSI-based tag sorting. Use Value: Enables sub-second tag census across 10+ moving assets using single-reader deployment with no host CPU intervention. | Use Scenario: Automated vehicle and cargo verification at warehouse entry/exit points. IC Role / Device Role / Timing Role: Primary RFID transceiver controlling external high-gain antennas and managing multi-zone interrogation timing. Use Value: Delivers >99.8% read reliability at 8 m range under variable environmental conditions including metal reflection and humidity. |
| Smart Shelf Inventory | Reusable Packaging Management |
Use Scenario: Continuous monitoring of retail shelf stock levels using embedded UHF antennas beneath display surfaces. IC Role / Device Role / Timing Role: Low-power reader IC executing periodic short-burst inventories with dynamic power scaling based on tag density. Use Value: Achieves 2-week battery life on coin cell when paired with duty-cycled antenna activation and sleep-mode wake-on-RF. | Use Scenario: Lifecycle tracking of returnable transport items (RTIs) across distribution networks. IC Role / Device Role / Timing Role: Reader IC supporting encrypted tag write operations and tamper-detection flag updates per ISO/IEC 18000-63. Use Value: Ensures data integrity and audit trail compliance for reusable packaging with cryptographic tag authentication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UHF RFID reader IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Impinj Speedway R420 | External FPGA-based architecture requiring discrete RF front-end; higher system BOM cost and larger PCB footprint. | Targeted at fixed infrastructure deployments with multi-antenna port support and Ethernet connectivity. | Select when needing ≥4 antenna ports, PoE, or enterprise-grade API integration - not suitable for compact embedded designs. |
| NXP MRU100 | Lacks Gen2v2 support; limited to EPCglobal Gen2v1 and basic ISO/IEC 18000-6C; no on-chip temperature sensor. | Designed for cost-sensitive access control and simple inventory systems with static tag populations. | Select only for legacy Gen2v1-only deployments where firmware upgrade path to Gen2v2 is unavailable. |
Compared with Impinj R420 and NXP MRU100, the ST25RU3980-BQFT delivers Gen2v2 compliance in a single-chip solution with integrated thermal management and minimal external component count - optimizing for space-constrained, high-reliability embedded reader modules.
Availability
ST25RU3980-BQFT is available at Aetrix Electronics and suitable for industrial asset tracking, logistics gate readers, smart shelf inventory, and reusable packaging management requiring stable component supply and long-term lifecycle assurance.
Supply support for ST25RU3980-BQFT 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
ams OSRAM is a global leader in innovative light and sensor solutions, headquartered in Austria and Germany, with over 110 years of engineering heritage and 18,500 employees including 5,000 engineers.
The ST25RU3980-BQFT belongs to ams OSRAM's RFID Solutions product line, designed specifically for high-performance, embedded UHF RFID reader applications demanding protocol compliance, thermal robustness, and compact integration.
FAQ
What antenna types are supported by the ST25RU3980-BQFT?
The ST25RU3980-BQFT supports standard 50 Ω single-ended or balanced antennas via integrated balun interface. It is validated with linearly polarized patch, dipole, and circularly polarized antennas. Antenna matching network design must maintain VSWR <1.5 across 860–960 MHz, and the IC's built-in RSSI calibration compensates for impedance drift due to temperature or mechanical stress.
Does the ST25RU3980-BQFT require an external microcontroller?
Yes - the ST25RU3980-BQFT requires an external MCU for system-level control, command sequencing, and host communication. It does not include embedded flash or firmware execution capability. However, its hardware-accelerated Gen2v2 engine offloads protocol processing, reducing MCU load by handling CRC, Q-algorithm, and anti-collision autonomously.
How is thermal performance managed during continuous transmission?
The ST25RU3980-BQFT integrates a calibrated on-die temperature sensor and programmable PA bias control. Firmware can dynamically adjust output power and modulation parameters based on real-time die temperature readings to maintain stable RF performance and prevent thermal shutdown, even during sustained 100% duty-cycle operation.
Can the ST25RU3980-BQFT operate in regulatory-compliant modes for different regions?
Yes - the ST25RU3980-BQFT supports region-specific regulatory profiles including FCC Part 15, ETSI EN 302 208, and ARIB STD-T66. Its firmware-configurable output power, spectral mask filtering, and listen-before-talk (LBT) timing parameters allow full compliance without hardware modification across North America, Europe, Japan, and Korea.
ST25RU3980-BQFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ST25R
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- RFID Reader
- Frequency:
- 860MHz ~ 960MHz
- Standards:
- EPC, ISO 18000-6
- Interface:
- SPI
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ST25RU3980-BQFT FAQ
1.How can I place an order for ST25RU3980-BQFT through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25RU3980-BQFT 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 ST25RU3980-BQFT reliable?
The price and inventory of ST25RU3980-BQFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25RU3980-BQFT is usually 5 days.
3.What payment methods are accepted for ST25RU3980-BQFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25RU3980-BQFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25RU3980-BQFT?
ST25RU3980-BQFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25RU3980-BQFT 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 ST25RU3980-BQFT?
For technical support, including ST25RU3980-BQFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25RU3980-BQFT requirements.
6.How does Aetrix verify that ST25RU3980-BQFT is sourced from the original manufacturer or authorized distributors?
All ST25RU3980-BQFT 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 ST25RU3980-BQFT meets industry standards.
7.What is the process for return or replacement of ST25RU3980-BQFT?
All ST25RU3980-BQFT units undergo pre-shipment inspection (PSI). If there is an issue with ST25RU3980-BQFT, 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 ST25RU3980-BQFT part is unused and in its original packaging.
Return procedure for ST25RU3980-BQFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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