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Silicon Labs SI4063-B0B-FM
- Part No.:
- SI4063-B0B-FM
- Manufacturer:
- Silicon Labs
- Category:
- RF Transmitters
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SI4063-B0B-FM.pdf
- Description:
- RF TX IC 142MHZ-1.05GHZ 20VFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,238
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Product details
Overview
SI4063-B0B-FM from Silicon Laboratories is a high-performance, low-current sub-GHz ISM band transmitter IC operating from 142 to 1050 MHz, delivering up to +20 dBm output power with 70 mA current at 169 MHz and 85 mA at 915 MHz, supporting (G)FSK/4(G)FSK/(G)MSK/OOK modulation for smart metering and remote control applications.
For engineers reviewing the SI4063-B0B-FM datasheet, SI4063-B0B-FM pinout, SI4063-B0B-FM application, or SI4063-B0B-FM equivalent, key selection considerations include its 20-pin QFN package, 30 nA shutdown current, IEEE 802.15.4g and WMbus compliance, integrated TX ramp control, and support for external FET boosting to +27 dBm.
Technical Context
The SI4063-B0B-FM integrates a ΔΣ fractional-N PLL synthesizer with VCO calibration and supports four frequency bands (142–175, 283–350, 420–525, 850–1050 MHz) with 4.7–28.6 Hz frequency resolution. Its direct-modulation TX path includes Gaussian filtering (B×T = 0.5) and programmable ramping for spectral purity.
It features a single-ended Class-E PA with internal LDOs, autonomous packet handling via 64-byte TX FIFO, and auxiliary blocks including a ±1°C accurate temperature sensor, low-battery detector (50 mV resolution), and wake-up timer with 32 kHz RC or crystal clock source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Freq. Range | 142–1050 MHz across four discrete bands; enables global deployment in FCC Part 90, ETSI Class-I, ARIB, and China regulatory bands. |
| Max Output Power | +20 dBm at 169/460/915 MHz; supports extended range without external PA in most smart metering deployments. |
| TX Current | 70 mA @ +20 dBm / 169 MHz, 85 mA @ +20 dBm / 915 MHz; enables coin-cell operation in low-duty-cycle telemetry. |
| Modulation | (G)FSK, 4(G)FSK, (G)MSK, OOK; supports legacy and standards-based protocols including WMbus Mode N/T/S and 802.15.4g. |
| Power Modes | 30 nA shutdown, 50 nA standby, 1.8 mA ready mode; minimizes average current in battery-powered endpoints. |
| Data Rate | 100 bps to 1 Mbps; accommodates narrowband telemetry (e.g., 1.2 kbps M-Bus) and higher-rate remote control. |
| Supply Voltage | 1.8–3.6 V; compatible with single alkaline, Li-SOCl₂, or dual NiMH cells without regulation overhead. |
Pinout & Package
SI4063-B0B-FM is housed in a 20-pin 4×4 mm QFN package with exposed thermal pad (EPAD), optimized for RF performance and compact PCB layout in sub-GHz wireless modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDN) | Shutdown Control | Active-high input that forces 30 nA shutdown; requires ≥10 µs high pulse to ensure reliable POR on wake-up. |
| 2 (GND) | Ground Reference | Digital ground pin; must be connected to EPAD and low-impedance ground plane for RF stability. |
| 3 (GPIO0) | General-Purpose I/O | Configurable as TX enable, interrupt output, or analog input; supports 2.53 mA drive strength in LL mode. |
| 4 (nSEL) | SPI Chip Select | Active-low SPI interface enable; initiates command sequence and resets fast-response register read pointer. |
| 5 (SDI) | SPI Data Input | Serial data input for firmware commands and property writes; accepts up to 10 MHz clock rate with 20 ns setup/hold. |
| 6 (SDO) | SPI Data Output | Serial data output for read responses; data valid on SCLK falling edge, sampled on rising edge by host MCU. |
| 7 (SCLK) | SPI Clock | Master-generated clock up to 10 MHz; controls timing of all SPI transactions and CTS polling cycles. |
| 8 (NC) | No Connect | Not internally bonded; must remain unconnected per datasheet guidance for signal integrity. |
| 9 (NC) | No Connect | Not internally bonded; floating or tied to GND per layout best practice to reduce parasitic coupling. |
| 10 (TX) | RF Output | Single-ended PA output; requires external matching network (e.g., Pi-filter) for +20 dBm into 50 Ω load. |
| 11 (GPIO1) | General-Purpose I/O | Programmable as nIRQ alternative or ADC input; supports GPIO wakeup and event flagging. |
| 12 (VDD) | Power Supply | 1.8–3.6 V main supply; decoupling with 100 nF + 10 nF capacitors required within 2 mm of pin. |
| 13 (nIRQ) | Interrupt Output | Open-drain active-low interrupt; signals TX completion, FIFO empty, or auxiliary event without polling. |
| 14 (XIN) | Clock Input | 30 MHz crystal or CMOS clock input; start-up time ≤250 µs with reference board layout. |
| 15 (GPIO3) | General-Purpose I/O | Configurable as clock output (Fxtal/2, /3, /7.5, etc.) or ADC channel; supports system clock distribution. |
| 16 (XOUT) | Clock Output | 30 MHz crystal oscillator output; drives external crystal or serves as reference for secondary timing domains. |
| 17 (GPIO2) | General-Purpose I/O | ADC input for temperature sensor or external voltage monitoring; shares same 4.5 codes/°C sensitivity. |
| 18 (TXRamp) | PA Ramping Control | Analog voltage input controlling PA ramp slope; enables precise spectral mask compliance for FCC/ETSI emissions. |
| 19 (VDD) | Power Supply | Second VDD pin; must be tied directly to same supply rail as Pin 12 with independent local decoupling. |
| 20 (GND) | Ground Reference | Second ground pin; connects to EPAD and forms part of RF return path for TX output stage. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated +20 dBm PA | Eliminates need for external power amplifier in most sub-GHz smart metering designs, reducing BOM count and PCB area. |
| Ultra-low 30 nA shutdown | Extends shelf life and field longevity of battery-powered devices by minimizing leakage during storage or infrequent use. |
| Autonomous packet handler | Offloads MCU by encoding preamble, sync word, CRC, and whitening - enabling low-cost 8-bit microcontrollers. |
| On-chip temperature sensor | Provides ±1°C accuracy over –40 to +85°C for PA compensation and environmental monitoring without external components. |
| Low-battery detector (50 mV) | Enables graceful degradation (e.g., reduced TX power or alert transmission) before system failure in coin-cell applications. |
Applications
| Smart Metering | Remote Keyless Entry |
|---|---|
Use Scenario: Wireless gas/water/electricity meters transmitting hourly consumption data via WMbus Mode N/T/S in dense urban environments. IC Role / Device Role / Timing Role: Sub-GHz transmitter handling packetized data with automatic CRC, whitening, and preamble generation at 169 MHz. Use Value: +20 dBm output and narrowband phase noise (–106 dBc/Hz @ 10 kHz offset) ensure link robustness through building attenuation and co-channel interference. | Use Scenario: Automotive key fobs sending encrypted unlock commands at 315/433/868 MHz with ultra-low quiescent current. IC Role / Device Role / Timing Role: Low-power ISM band transmitter with fast wake-from-standby (440 µs) and configurable OOK/GFSK modulation. Use Value: 50 nA standby current and 18 mA TX current at +10 dBm extend CR2032 battery life beyond 5 years in typical usage profiles. |
| Home Security Sensors | Industrial Telemetry Nodes |
Use Scenario: Battery-powered door/window sensors reporting tamper events and battery status every 24 hours using 868 MHz ISM band. IC Role / Device Role / Timing Role: Duty-cycled transmitter with integrated wake-up timer, low-battery detection, and 64-byte TX FIFO for burst transmission. Use Value: 32 kHz RC oscillator with 2500 ppm accuracy enables precise sleep scheduling without external crystal, cutting component cost. | Use Scenario: Remote tank level monitors in oil/gas fields transmitting pressure/temperature readings via 915 MHz LoRaWAN-compatible PHY. IC Role / Device Role / Timing Role: High-efficiency transmitter supporting 1 Mbps data rate and Gaussian filtering (B×T = 0.5) for spectral containment. Use Value: 85 mA TX current at +20 dBm/915 MHz delivers >1 km line-of-sight range while maintaining <10 µA average current at 0.1% duty cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sub-GHz transmitter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SX1276IMLTRT | LoRa-capable transceiver (RX+TX), 13 dBm max output, 4.8 mA RX current; requires external PA for >13 dBm. | Supports long-range LoRa modulation but lacks native WMbus/802.15.4g packet handling; needs MCU firmware for protocol stack. | Choose SX1276IMLTRT when LoRaWAN network integration or bidirectional communication is required; SI4063-B0B-FM is preferred for pure TX, standards-compliant, low-BOM metering. |
| CC1125RHBR | Narrowband transceiver with +16 dBm output, 15.5 mA TX current at 868 MHz; no integrated temperature sensor or low-battery detector. | Targets industrial sensing with better adjacent-channel rejection but lacks autonomous packet handler and GPIO flexibility. | Choose CC1125RHBR for high-selectivity narrowband systems needing superior out-of-band rejection; SI4063-B0B-FM offers lower system-level power and richer peripheral integration. |
Compared with SX1276IMLTRT and CC1125RHBR, SI4063-B0B-FM delivers higher TX output (+20 dBm vs. +13/+16 dBm), deeper sleep (30 nA vs. 100 nA/500 nA), and built-in protocol acceleration for WMbus/802.15.4g - reducing MCU overhead and total solution size.
Availability
SI4063-B0B-FM is available at Aetrix Electronics and suitable for smart metering, remote keyless entry, home security sensors, and industrial telemetry requiring stable component supply and long-term lifecycle support.
Supply support for SI4063-B0B-FM 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
Silicon Laboratories is a fabless semiconductor company specializing in mixed-signal ICs for timing, wireless, and IoT applications, with design centers in Austin, Munich, and Taipei.
The Si406x product line was engineered specifically for ultra-low-power, regulatory-compliant sub-GHz wireless transmission in utility metering and industrial sensing - emphasizing integrated PA efficiency, autonomous packet handling, and minimal external component count.
FAQ
What is the maximum output power achievable with the SI4063-B0B-FM?
The SI4063-B0B-FM delivers up to +20 dBm output power into a properly matched 50 Ω load at frequencies including 169 MHz (70 mA), 460 MHz (75 mA), and 915 MHz (85 mA). With an external FET and ramp control via the TXRamp pin, it supports +27 dBm operation - verified in Silicon Labs Application Note AN642.
Does the SI4063-B0B-FM support IEEE 802.15.4g and WMbus standards?
Yes, the SI4063-B0B-FM is explicitly designed to comply with IEEE 802.15.4g and WMbus (EN 13757-4) standards. Its modulation support ((G)FSK, 4(G)FSK), narrowband phase noise (–106 dBc/Hz @ 10 kHz), and integrated packet handler with CRC/whitening enable direct implementation of Mode N/T/S physical layers without external processing.
What are the power consumption modes of the SI4063-B0B-FM?
The SI4063-B0B-FM offers five defined power states: 30 nA shutdown (SDN high), 50 nA standby (registers retained), 900 nA sleep (32 kHz timer active), 1.8 mA ready (XO running), and TX mode (70–85 mA depending on frequency and output power). Transition times range from 58 µs (TX tune) to 15 ms (shutdown wake).
Can the SI4063-B0B-FM operate from a single 1.8 V supply?
Yes, the SI4063-B0B-FM operates across a 1.8–3.6 V supply range. At 1.8 V, it maintains full functionality including +20 dBm output (with adjusted matching), 100 bps–1 Mbps data rates, and all auxiliary features (temperature sensor, LBD, GPIOs), though TX current increases slightly versus 3.3 V operation per datasheet Table 1.
How does the SI4063-B0B-FM handle crystal oscillator start-up and stability?
The SI4063-B0B-FM uses a 30 MHz fundamental-mode crystal connected between XIN and XOUT pins. Typical start-up time is ≤250 µs with recommended layout; frequency accuracy is maintained via internal calibration. The device also supports external 30 MHz CMOS clock input and includes a 32 kHz RC oscillator (2500 ppm) for low-power timing.
SI4063-B0B-FM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Series:
- EZRadioPRO®
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Frequency:
- 142MHz ~ 1.05GHz
- Applications:
- General Purpose
- Modulation or Protocol:
- -
- Data Rate (Max):
- 1Mbps
- Power - Output:
- 20dBm
- Current - Transmitting:
- 85mA
- Data Interface:
- PCB, Surface Mount
- Antenna Connector:
- PCB, Surface Mount
- Memory Size:
- -
- Features:
- -
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
SI4063-B0B-FM FAQ
1.How can I place an order for SI4063-B0B-FM through Aetrix?
Please submit a Request for Quotation (RFQ) for SI4063-B0B-FM 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 SI4063-B0B-FM reliable?
The price and inventory of SI4063-B0B-FM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI4063-B0B-FM is usually 5 days.
3.What payment methods are accepted for SI4063-B0B-FM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI4063-B0B-FM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI4063-B0B-FM?
SI4063-B0B-FM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI4063-B0B-FM 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 SI4063-B0B-FM?
For technical support, including SI4063-B0B-FM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI4063-B0B-FM requirements.
6.How does Aetrix verify that SI4063-B0B-FM is sourced from the original manufacturer or authorized distributors?
All SI4063-B0B-FM 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 SI4063-B0B-FM meets industry standards.
7.What is the process for return or replacement of SI4063-B0B-FM?
All SI4063-B0B-FM units undergo pre-shipment inspection (PSI). If there is an issue with SI4063-B0B-FM, 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 SI4063-B0B-FM part is unused and in its original packaging.
Return procedure for SI4063-B0B-FM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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