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STMicroelectronics SPIRIT1QTR
- Part No.:
- SPIRIT1QTR
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SPIRIT1QTR.pdf
- Description:
- IC RF TXRX ISM<1GHZ 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,264
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Product details
Overview
SPIRIT1QTR from STMicroelectronics is a low-power, sub-1 GHz RF transceiver IC designed for license-free ISM/SRD bands (150–174 MHz, 300–348 MHz, 387–470 MHz, 779–956 MHz). It supports 2-FSK/GFSK/MSK/GMSK/OOK/ASK modulation, achieves –118 dBm receiver sensitivity, delivers up to +16 dBm output power, and operates with 9 mA RX / 21 mA TX current at +11 dBm - enabling battery-powered AMR and WSN nodes.
For engineers reviewing the SPIRIT1QTR datasheet, SPIRIT1QTR pinout, SPIRIT1QTR application, or SPIRIT1QTR equivalent, key selection criteria include programmable channel spacing (≥12.5 kHz), integrated AES-128 encryption, antenna diversity support, embedded CSMA/CA protocol engine, and 96-byte dual FIFOs for robust low-duty-cycle wireless link design.
Technical Context
The SPIRIT1QTR implements a low-IF receiver architecture with dual-stage LNA, quadrature downconversion, and 12-bit ADC digitization of I/Q signals. Its direct-synthesis transmitter integrates a fully programmable PA with ramping control and supports Tx boost mode for extended range.
Baseband processing includes configurable digital filters (1 kHz–800 kHz bandwidth), automatic frequency offset compensation (AFC), symbol timing recovery (DLL/PLL modes), and packet handling with sync word detection, address filtering, CRC, FEC with interleaving, and whitening - all managed via SPI-configurable registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Bands | 150–174 MHz, 300–348 MHz, 387–470 MHz, 779–956 MHz - covers global sub-GHz ISM/SRD allocations including 169/315/433/868/915 MHz. |
| Receiver Sensitivity | –118 dBm @ 1.2 kbps, 2-FSK - enables reliable reception in high-path-loss environments like meter enclosures or dense building structures. |
| Air Data Rate | 1–500 kbps programmable - supports both ultra-low-power telemetry (e.g., hourly gas meter reads) and burst-mode sensor data uploads. |
| TX Output Power | Programmable up to +16 dBm - allows link budget optimization across varying antenna efficiency and regulatory limits (e.g., EN 300 220 Class 1). |
| Power Consumption | 9 mA RX, 21 mA TX @ +11 dBm - enables >10-year battery life in 10-second wake-up interval AMR deployments using CR123A cells. |
| FIFO Depth | 96 bytes each for TX and RX - buffers full M-Bus frames (up to 90 bytes payload + headers) without host MCU intervention during packet transmission/reception. |
| Modulation Schemes | 2-FSK, GFSK, MSK, GMSK, OOK, ASK - ensures interoperability with legacy W-MBUS, FCC Part 15.247, and ARIB STD-T67/T93 systems. |
| Encryption | AES-128 co-processor - performs hardware-accelerated encryption/decryption offloading MCU resources while meeting EN 13757-4 security requirements. |
Pinout & Package
Package: QFN20 (4 × 4 mm, 0.5 mm pitch, RoHS-compliant, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_IO | Digital I/O supply | 1.8–3.6 V input powering SPI interface, GPIOs, and digital logic - decoupled separately from RF supply for noise isolation. |
| VDD_DIG | Digital core supply | 1.8–3.6 V supply for baseband processor, packet engine, and AES co-processor - requires low-noise LDO regulation. |
| VDD_RF | RF circuit supply | 1.8–3.6 V dedicated supply for LNA, mixer, synthesizer, and PA - critical for achieving –118 dBm sensitivity and spectral purity. |
| ANT1 / ANT2 | Antenna diversity terminals | Dual RF outputs supporting automatic antenna switching algorithm - improves link reliability in multipath indoor environments. |
| SDN | Shutdown control | Active-low enable pin placing device in <100 nA deep-sleep mode - essential for ultra-low average current in battery-operated sensors. |
| SCLK / SDI / SDO / CSn | SPI interface signals | 4-wire SPI (mode 0, CPHA=0, CPOL=0) operating up to 10 MHz - enables fast register configuration and FIFO access with minimal MCU overhead. |
| GPIO_1–GPIO_4 | Configurable digital I/O | Programmable as IRQ output, carrier sense indicator, RSSI threshold alert, or packet-ready signal - reduces external logic in compact designs. |
| XTAL_IN / XTAL_OUT | Crystal oscillator connection | Supports 24 or 26 MHz fundamental-mode crystals - provides precise frequency reference for ±2 ppm stability in temperature-compensated timing-critical applications. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable RX digital filter | Adjustable 1–800 kHz bandwidth enables optimal SNR trade-off per data rate and channel spacing (e.g., 12.5 kHz for EN 300 220 compliance). |
| Embedded CSMA/CA engine | Hardware-accelerated listen-before-talk logic eliminates MCU polling overhead and ensures reliable medium access in multi-node WSNs. |
| Antenna diversity algorithm | Automatic real-time selection between ANT1/ANT2 based on RSSI and PQI metrics - mitigates fading without external RF switches or control firmware. |
| Ultra-low power RC oscillator | Integrated 16 MHz RCO calibrated to ±1% accuracy - enables fast wake-up (<6 µs) from sleep without external crystal, reducing BOM cost and start-up latency. |
| Battery indicator & low-battery detector | Analog voltage monitoring with programmable thresholds - triggers interrupt before brown-out, allowing graceful shutdown or data flush in energy-harvested nodes. |
| Dynamic packet length support | Firmware-transparent variable payload handling (up to 255 bytes) - simplifies protocol stack implementation for heterogeneous sensor networks with mixed data types. |
Applications
| AMR (Automatic Meter Reading) | Home & Building Automation |
|---|---|
Use Scenario: Wireless transmission of gas/water/electricity consumption data from sealed utility meters to concentrators every 1–24 hours. IC Role / Device Role / Timing Role: Sub-GHz transceiver handling W-MBUS Mode S/T/R packets with AES-128 encryption and automatic retransmission on ACK timeout. Use Value: –118 dBm sensitivity ensures reliable reception through metal meter casings; 9 mA RX current extends CR123A battery life beyond 10 years. |
Use Scenario: Interconnecting thermostats, door/window sensors, and lighting controllers in retrofit residential installations with limited wiring access. IC Role / Device Role / Timing Role: Low-power node transceiver implementing EN 13757-4 compliant M-BUS packets with dynamic payload length and antenna diversity. Use Value: Programmable channel spacing (12.5 kHz) avoids interference from neighboring Zigbee/Wi-Fi; integrated CSMA/CA prevents packet collisions in meshed topologies. |
| Industrial Monitoring | Wireless Fire & Security Alarms |
Use Scenario: Battery-powered vibration/temperature sensors on rotating machinery in factories, reporting status every 5 minutes over 100+ meter line-of-sight links. IC Role / Device Role / Timing Role: Robust RF transceiver with AFC and RSSI-based link quality feedback, supporting GFSK at 50 kbps with FEC-enabled packet integrity. Use Value: +16 dBm output power and 800 kHz programmable RX filter maximize range and noise immunity in electrically noisy industrial plants. |
Use Scenario: Smoke/heat detectors transmitting alarm events within 2 seconds to central panel in multi-story commercial buildings with concrete walls. IC Role / Device Role / Timing Role: Ultra-fast startup transceiver (6 µs synthesizer settling) enabling immediate transmission upon sensor trigger, with automatic ACK and timeout retry. Use Value: 6 µs wake-to-transmit latency meets UL 217 response time requirements; AES-128 prevents malicious packet injection into life-safety systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sub-GHz transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SX1276IMLTRT | LoRa®-modulated transceiver with higher link budget (+20 dB vs. FSK), but larger footprint (QFN32) and no integrated AES or CSMA/CA engine. | Better suited for long-range, low-node-density rural IoT; lacks hardware packet engine for dense AMR deployments. | Choose when >5 km range is required and MCU can handle LoRa PHY layer and MAC protocol stack. |
| CC1125RHBR | Higher RF performance (–120 dBm sensitivity), but consumes 13 mA RX and lacks antenna diversity or integrated AES acceleration. | Preferred for high-reliability industrial telemetry where power is less constrained than in battery AMR. | Choose when maximum sensitivity is critical and external encryption/AES co-processor can be added to BOM. |
Compared with SX1276IMLTRT and CC1125RHBR, SPIRIT1QTR uniquely combines ultra-low RX current (9 mA), integrated AES-128, hardware CSMA/CA, and antenna diversity in a compact QFN20 - making it optimal for cost-sensitive, battery-powered, high-node-density sub-GHz networks requiring regulatory compliance and security out-of-the-box.
Availability
SPIRIT1QTR is available at Aetrix Electronics and suitable for automatic meter reading (AMR), wireless sensor networks (WSN), and industrial monitoring requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SPIRIT1QTR 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, specializing in microcontrollers, analog ICs, MEMS, and power management solutions for industrial, automotive, and consumer markets.
SPIRIT1QTR belongs to ST's ultra-low-power sub-GHz RF transceiver product line, engineered specifically for secure, standards-compliant wireless communication in battery-operated utility and building automation endpoints.
FAQ
What regulatory certifications does SPIRIT1QTR support out-of-the-box?
SPIRIT1QTR is pre-qualified for EN 300 220 (Europe), FCC CFR47 Part 15 (USA), and ARIB STD-T67/T93/T108 (Japan) across its supported bands. Its programmable channel spacing (down to 12.5 kHz), integrated CCA, and CSMA/CA engine enable direct compliance with listen-before-talk requirements without additional firmware development.
How does the antenna diversity feature operate without external components?
The SPIRIT1QTR integrates an on-chip antenna switching controller that continuously monitors RSSI and PQI on ANT1 and ANT2. Based on real-time signal quality metrics, it autonomously selects the optimal antenna path during RX and dynamically adjusts TX path selection - eliminating need for external RF switches or GPIO-controlled diversity logic.
Can SPIRIT1QTR interface directly with a 1.8 V microcontroller?
Yes - VDD_IO accepts 1.8–3.6 V, and all digital I/Os (SPI, GPIOs) are 1.8 V tolerant with rail-to-rail operation. The SPI interface supports 10 MHz clock rates at 1.8 V, enabling seamless integration with ultra-low-power MCUs like STM32L4 or EFM32 without level-shifting circuitry.
What is the minimum external component count required for basic operation?
A functional SPIRIT1QTR radio requires only six external components: two 24 MHz crystal load capacitors (12 pF), one RF matching network (3–5 passive components depending on band), one VDD_RF decoupling capacitor (100 nF), and one VDD_DIG/VDD_IO decoupling capacitor (100 nF) - enabling minimal BOM cost and PCB area in space-constrained modules.
SPIRIT1QTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx Only
- RF Family/Standard:
- General ISM < 1GHz
- Protocol:
- -
- Modulation:
- 2FSK, ASK, GFSK, GMSK, MSK, OOK
- Frequency:
- 150MHz ~ 174MHz, 300MHz ~ 348MHz, 387MHz ~ 470MHz, 779MHz ~ 956MHz
- Data Rate (Max):
- 500kbps
- Power - Output:
- 16dBm
- Sensitivity:
- -118dBm
- Memory Size:
- -
- Serial Interfaces:
- SPI
- GPIO:
- 4
- Voltage - Supply:
- 1.8V ~ 3.6V
- Current - Receiving:
- 9.2mA ~ 9.8mA
- Current - Transmitting:
- 6mA ~ 54mA
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-QFN (4x4)
SPIRIT1QTR FAQ
1.How can I place an order for SPIRIT1QTR through Aetrix?
Please submit a Request for Quotation (RFQ) for SPIRIT1QTR 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 SPIRIT1QTR reliable?
The price and inventory of SPIRIT1QTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPIRIT1QTR is usually 5 days.
3.What payment methods are accepted for SPIRIT1QTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPIRIT1QTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SPIRIT1QTR?
SPIRIT1QTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SPIRIT1QTR 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 SPIRIT1QTR?
For technical support, including SPIRIT1QTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPIRIT1QTR requirements.
6.How does Aetrix verify that SPIRIT1QTR is sourced from the original manufacturer or authorized distributors?
All SPIRIT1QTR 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 SPIRIT1QTR meets industry standards.
7.What is the process for return or replacement of SPIRIT1QTR?
All SPIRIT1QTR units undergo pre-shipment inspection (PSI). If there is an issue with SPIRIT1QTR, 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 SPIRIT1QTR part is unused and in its original packaging.
Return procedure for SPIRIT1QTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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