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Texas Instruments CC1121RHBR
- Part No.:
- CC1121RHBR
- Manufacturer:
- Texas Instruments
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
CC1121RHBR.pdf
- Description:
- IC RF TXRX+MCU ISM<1GHZ 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,832
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Product details
Overview
CC1121RHBR from Texas Instruments is a high-performance, single-chip sub-1 GHz RF transceiver optimized for ultra-low-power wireless systems operating in 169–960 MHz ISM/SRD bands. It delivers –120 dBm sensitivity at 1.2 kbps, supports 2-FSK/4-FSK/GFSK/MSK/OOK modulation, and achieves +16 dBm programmable output power with 0.4-dB step resolution-enabling robust long-range metering and smart grid links.
For engineers reviewing the CC1121RHBR datasheet, CC1121RHBR pinout, CC1121RHBR application, or CC1121RHBR equivalent, this page provides verified technical context, validated pin functions, confirmed regulatory compliance (ETSI EN 300 220, FCC Part 15.247/249, ARIB STD-T108), and real-world design implications for low-power receive polling, antenna diversity, and CC1190 range extension integration.
Technical Context
The CC1121RHBR integrates a fractional-N synthesizer with <–111 dBc/Hz phase noise at 10-kHz offset, dual-path analog front-end with high-linearity LNA (IIP3 = –8 dBm) and 14-dBm PA, and digital signal processing including WaveMatch sync detection and built-in coding gain. Its architecture supports seamless transition between low-power RX sniff mode (2 mA) and high-performance RX mode (22 mA peak).
Hardware-accelerated packet handling includes automatic ACK, retransmission control, CCA for LBT, RSSI measurement, temperature sensing, and eWOR timer-managed via SPI interface with configurable GPIOs (GPIO0–GPIO3) and dedicated RF pins (LNA_P/LNA_N, PA, TRX_SW). All filters are fully integrated, eliminating external SAW/IF components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | –120 dBm @ 1.2 kbps (868-MHz band, high-performance mode); enables reception of weak signals in battery-powered AMR nodes. |
| Output Power | +16 dBm max @ 868 MHz with 3.6 V supply; supports extended range without external PA in most SRD applications. |
| Data Rate | 1.2–200 kbps programmable; covers narrowband telemetry (1.2 kbps) and IEEE 802.15.4g mandatory mode (50 kbps 2GFSK). |
| Modulation | 2-FSK, 4-FSK, 2-GFSK, 4-GFSK, MSK, OOK; allows flexible spectral efficiency and regulatory mask compliance across global bands. |
| Supply Voltage | 2.0–3.6 V; compatible with single-cell Li-ion, Li-SOCl₂, or 3×AA battery systems without voltage regulation overhead. |
| Power Consumption | 0.12 µA in power-down with retention; enables multi-year operation in wake-on-radio sensor networks. |
| Regulatory Compliance | FCC Part 15.247/249, ETSI EN 300 220 Cat. 2, ARIB STD-T108; certified-ready for deployment in North America, Europe, and Japan. |
Pinout & Package
VQFN-32 (RHB) package: 5.0 mm × 5.0 mm, no-lead, thermally enhanced with exposed ground pad requiring solid PCB ground plane connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD_GUARD | Power guard ring | Isolates digital noise from RF sections; must be tied to same 2.0–3.6 V supply as DVDD/AVDD pins. |
| 2 RESET_N | Asynchronous reset input | Active-low signal; initiates full hardware reset and state machine initialization on falling edge. |
| 9 SO (GPIO1) | Serial data output / general-purpose I/O | Primary SPI MISO; configurable as GPIO during non-SPI operation for status signaling or control. |
| 11 CSn | Chip select input | Active-low SPI slave select; enables communication only when asserted, reducing bus contention. |
| 17 PA | Transmit RF output | Single-ended TX port requiring DC path to VDD; matched to 35 + j35 Ω at 868 MHz for optimal power transfer. |
| 19 LNA_P / 20 LNA_N | Differential RX input | High-impedance differential antenna interface; requires DC path to GND and matching network per band. |
| 23 LPF0 / 24 LPF1 | Loop filter connections | Analog nodes for external passive loop filter components; critical for PLL stability and phase noise performance. |
| 32 EXT_XOSC | External clock input | Accepts TCXO or crystal oscillator reference; disables XOSC_Q1/Q2 when used, enabling precise frequency stability. |
Key Features
| Feature | Design Value |
|---|---|
| WaveMatch DSP engine | Improves sync word detection reliability under low-SNR conditions, reducing false wake-ups in burst-mode sensor networks. |
| eWOR timer with RC oscillator | Enables autonomous low-power receive polling at user-defined intervals (e.g., every 1 s), achieving 15 µA average RX current. |
| Integrated channel filters | Eliminates need for external SAW/IF filters-reducing BOM cost, board area, and tuning complexity in production. |
| Antenna diversity support | Hardware-assisted switching between two antennas using GPIO-controlled RF switches, improving link robustness in multipath environments. |
| Auto-Ack and retransmission | Offloads MAC-layer reliability functions from host MCU, simplifying firmware and ensuring packet delivery in noisy channels. |
Applications
| Wireless Smart Grid (AMI/AMR) | Home & Building Automation |
|---|---|
|
Use Scenario: Battery-powered gas/water/electricity meters transmitting consumption data hourly over 1–5 km rural links. IC Role / Device Role / Timing Role: Primary RF transceiver handling packetized data transmission, CCA-based listen-before-talk, and Wake-On-Radio wake-up scheduling. Use Value: –120 dBm sensitivity and +16 dBm output enable single-hop coverage without repeaters; 0.12 µA power-down extends battery life beyond 10 years. |
Use Scenario: Zigbee-like lighting, HVAC, and security sensor networks with mesh topology and intermittent reporting. IC Role / Device Role / Timing Role: Sub-GHz PHY layer device supporting IEEE 802.15.4g mandatory mode (50 kbps 2GFSK) and automatic ACK. Use Value: Hardware packet handling and retransmission reduce MCU load; integrated TCXO support ensures timing accuracy for synchronized mesh routing. |
| Industrial Monitoring & Control | Wireless Alarm & Security Systems |
|
Use Scenario: Remote vibration, temperature, and pressure sensors in oil/gas pipelines or factory floors with metal-rich EMI environments. IC Role / Device Role / Timing Role: High-selectivity receiver (81 dB adjacent-channel rejection at 868 MHz) rejecting industrial noise while maintaining low-latency response. Use Value: 60 dB adjacent-channel selectivity and 86 dB blocking at 10 MHz suppress interference from motor drives and PLCs-ensuring reliable alarm triggering. |
Use Scenario: Door/window contact sensors and motion detectors transmitting encrypted alerts to central panel with <1 s latency. IC Role / Device Role / Timing Role: Low-latency transceiver with 50 µs RX/TX turnaround and fast synthesizer calibration (391 µs) for rapid channel hopping. Use Value: 166 µs IDLE-to-RX time (calibration disabled) enables immediate response to intrusion events; RSSI-based signal quality monitoring aids installation validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si4463-B1B | Higher max output (+20 dBm), integrated DC-DC converter, but larger QFN-20 package and no WaveMatch DSP. | Better suited for high-power, long-range point-to-point links; lacks CC1121RHBR's ultra-low-power RX sniff mode (2 mA vs 17 mA typical). | Select Si4463-B1B when >+16 dBm output or integrated power management is required; prefer CC1121RHBR for battery lifetime-critical AMR nodes. |
| AX5043 | Lower sensitivity (–117 dBm @ 1.2 kbps), wider 26–1050 MHz range, and no built-in coding gain or eWOR timer. | More flexible for multi-band designs but requires external microcontroller for wake-on-radio logic and packet retry handling. | Choose AX5043 for wide-frequency agility across legacy bands; CC1121RHBR offers superior sensitivity and integrated protocol acceleration for standardized SRD deployments. |
Compared with Si4463-B1B and AX5043, the CC1121RHBR delivers best-in-class sensitivity and lowest active RX current for sub-GHz ISM systems, with hardware features like WaveMatch and eWOR that reduce host MCU firmware complexity and extend battery life in duty-cycled applications.
Availability
CC1121RHBR is available at Aetrix Electronics and suitable for wireless smart grid, industrial monitoring, and building automation applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for CC1121RHBR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The CC1121RHBR belongs to TI's CC112x sub-GHz transceiver family, designed specifically for high-sensitivity, low-power wireless systems targeting ETSI/FCC/ARIB regulatory compliance in utility metering, sensor networks, and secure short-range devices.
FAQ
What frequency bands does the CC1121RHBR support?
The CC1121RHBR operates across multiple ISM/SRD bands: 164–192 MHz, 273–320 MHz, 410–480 MHz, 820–960 MHz. It achieves –120 dBm sensitivity at 868 MHz and supports FCC Part 15.247, ETSI EN 300 220, and ARIB STD-T108 compliance in these ranges. Band selection is configured via register settings-not hardware pin strapping.
Does the CC1121RHBR require external filters?
No, the CC1121RHBR integrates all RF filters-including channel, IF, and image-rejection filters-eliminating the need for external SAW or ceramic filters. This reduces bill-of-materials cost, PCB area, and calibration effort. Only external matching networks for PA and LNA are required per operating band.
How does the CC1121RHBR achieve ultra-low-power operation?
The CC1121RHBR achieves ultra-low-power operation through multiple modes: 0.12 µA power-down with retention, 2 mA RX sniff mode with periodic wake-up, and hardware-accelerated eWOR timer using an internal 32-kHz RC oscillator. These features allow multi-year battery life in wireless sensor nodes without external power management ICs.
Can the CC1121RHBR interface directly with a microcontroller?
Yes, the CC1121RHBR uses a standard 4-wire SPI interface (CSn, SI, SO, SCLK) for configuration and data transfer, plus four GPIOs (GPIO0–GPIO3) for status signaling and control. It requires no external level shifters when interfaced with 3.3 V MCUs and supports interrupt-driven operation via configurable GPIO pins.
What is the role of the WaveMatch feature in the CC1121RHBR?
WaveMatch is a proprietary digital signal processing algorithm in the CC1121RHBR that enhances sync word detection accuracy under low-SNR and multipath conditions. It improves packet acquisition reliability in noisy environments-critical for battery-powered devices where missed packets trigger energy-wasting retransmissions.
CC1121RHBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- General ISM < 1GHz
- Protocol:
- -
- Modulation:
- 2FSK, 2GFSK, 4FSK, 4GFSK, MSK, OOK
- Frequency:
- 164MHz ~ 192MHz, 274MHz ~ 320MHz, 410MHz ~ 480MHz, 820MHz ~ 960MHz
- Data Rate (Max):
- 200kbps
- Power - Output:
- 16dBm
- Sensitivity:
- -120dBm
- Memory Size:
- 4kB ROM, 256B RAM
- Serial Interfaces:
- SPI
- GPIO:
- 4
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Receiving:
- 17mA ~ 23mA
- Current - Transmitting:
- 26mA ~ 54mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-VQFN (5x5)
CC1121RHBR FAQ
1.How can I place an order for CC1121RHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for CC1121RHBR 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 CC1121RHBR reliable?
The price and inventory of CC1121RHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CC1121RHBR is usually 5 days.
3.What payment methods are accepted for CC1121RHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CC1121RHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CC1121RHBR?
CC1121RHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CC1121RHBR 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 CC1121RHBR?
For technical support, including CC1121RHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CC1121RHBR requirements.
6.How does Aetrix verify that CC1121RHBR is sourced from the original manufacturer or authorized distributors?
All CC1121RHBR 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 CC1121RHBR meets industry standards.
7.What is the process for return or replacement of CC1121RHBR?
All CC1121RHBR units undergo pre-shipment inspection (PSI). If there is an issue with CC1121RHBR, 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 CC1121RHBR part is unused and in its original packaging.
Return procedure for CC1121RHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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