CC1121RHBT - Sub-1GHz RF Transceiver 32-VFQFN | Texas Instruments
N.º de pieza: CC1121RHBT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
CC1121RHBT Descripción general
A single-chip RF transceiver combines a low-IF or zero-IF receiver, a direct-conversion or fractional-N synthesizer transmitter, and digital control logic into one integrated circuit. Within the wireless signal-chain hierarchy, the RF transceiver sits above discrete RF building blocks such as stand-alone receivers, power amplifiers, and synthesizers, providing a complete radio front end controlled over an SPI interface from an external host MCU.
Key features of the CC1121 include fully integrated filtering that removes the need for costly external SAW and IF filters, high-performance operation at very low power, and low-voltage operation suited to battery-powered systems. The wide, continuous band coverage across four ranges lets one design serve multiple regional ISM allocations, simplifying global product variants.
The device architecture integrates all channel filters, frequency synthesis, and modulation/demodulation on chip, so the external bill of materials is reduced to an antenna-matching network and a crystal reference. This integration improves manufacturability and reduces RF tuning effort in production compared with discrete radio designs.
Typical applications include ISM (Industrial, Scientific, and Medical) and SRD (Short Range Device) wireless links, such as industrial remote control, smart metering, wireless alarm and security systems, and telemetry in cost-sensitive wireless systems where high link performance and low power consumption are both required.
When designing with the CC1121RHBT, verify the crystal tolerance and antenna matching network against the target band, since output power and receiver sensitivity in each band depend on external component selection. Consult the manufacturer datasheet for band-specific reference designs.
This page synthesizes distributor availability data, drop-in alternatives within the CC12xx family, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para CC1121RHBT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con CC1121RHBT (mismo factor de forma y huella) — difiere en Package, Integrated Filters, Modulation, Product Type.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
CC1125RHBT
✅ Sustitución directa✓ En stock
$2.78 / unidad
Ver hoja de datos →CC1120RHBT
✅ Sustitución directa✓ En stock
$4.2 / unidad
Ver hoja de datos →CC1200RHBT
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
CC1121RHBT Especificaciones
| Product Type | Single-chip RF transceiver (TxRx + MCU) |
| Frequency Range (Band 1) | 164 MHz to 192 MHz |
| Frequency Range (Band 2) | 274 MHz to 320 MHz |
| Frequency Range (Band 3) | 410 MHz to 480 MHz |
| Frequency Range (Band 4) | 820 MHz to 960 MHz |
| Frequency Band Class | General ISM < 1 GHz |
| Encapsulado | 32-VFQFN Exposed Pad (RHBT) |
| Tipo de montaje | Surface Mount |
| Integrated Filters | Yes - no external SAW or IF filters required |
| Target Applications | ISM and SRD frequency bands |
Guía de configuración de pines de CC1121RHBT 32-vfqfn exposed pad (rhbt)
Configuración de pines para CC1121RHBT (encapsulado 32-vfqfn exposed pad (rhbt)). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para CC1121RHBT.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
CC1121RHBT es adecuado para 6 aplicacións: Smart Metering Wireless Endpoints, Wireless Alarm and Security Systems, Industrial Remote Control and Telemetry, Home Automation and IoT Sensor Nodes, Wireless Audio and Peripheral Links, RF Module and Gateway Designs.
Smart Metering Wireless Endpoints
Smart metering endpoints demand multi-year battery life, regulatory sub-1 GHz ISM operation, and low bill-of-materials cost. The CC1121RHBT fits because it is a fully integrated single-chip transceiver designed by Texas Instruments for very low-power, low-voltage operation, with all filters integrated so no external SAW or IF filters are needed - reducing both cost and assembly variability in high-volume meters. Its four band ranges (164-192, 274-320, 410-480, 820-960 MHz) let one meter platform serve different regional frequency allocations with a matching-network change rather than a redesign. In the meter, the CC1121 connects over SPI to the metering MCU and drives the antenna through a discrete match from the TI reference design; the receiver's integrated channel filtering keeps adjacent-meter interference manageable in dense deployments. The trade-off versus a transceiver with an integrated MCU is slightly higher firmware complexity, but this allows the metering and radio firmware to be optimized independently.
Recomendado
Wireless Alarm and Security Systems
Wireless alarm panels and sensors require dependable links, low standby current, and cost-effective radios across regional SRD bands. The CC1121RHBT is well suited because TI designed it specifically for ISM and SRD bands with high performance at very low power; integrated filtering eliminates external SAW parts that add cost and drift with temperature in unattended installations. Coverage from 410-480 MHz and 820-960 MHz addresses common security-band allocations in Asia, Europe, and the Americas. In a typical sensor node, the CC1121 sleeps with only the 32 kHz oscillator active, wakes on SPI command from a low-power MCU, transmits a short framed packet, and returns to sleep - duty-cycled operation that stretches coin-cell or lithium battery life. Performance consideration: the alarm designer should validate range against wall and multipath attenuation using the TI packet error-rate test setup, since receiver sensitivity in each band depends on the external matching network and crystal tolerance.
Recomendado
Industrial Remote Control and Telemetry
Industrial remote controls (crane controllers, gate openers, machine E-stop links) and short telemetry links operate in harsh RF environments with motors and switching noise nearby. The CC1121RHBT's fully integrated, high-performance filtering provides strong adjacent-channel rejection without external SAW filters, which matters on factory floors where 433 MHz and 868/915 MHz bands are congested. Its wide band coverage (up to four ranges including 164-192 MHz) allows long-range VHF variants where penetration through metal structures is needed. In the remote control, the CC1121 handles modulation, framing, and CRC in hardware, offloading the host MCU; the exposed-pad QFN package's solid ground connection supports repeatable RF performance across vibration and temperature. Designers should reserve margin in the link budget for fading and interference, and use the TI reference design layout to minimize spurious emissions for regulatory compliance in industrial environments.
Recomendado
Home Automation and IoT Sensor Nodes
Sub-1 GHz home automation nodes (door/window sensors, lighting controllers, thermostats) benefit from the CC1121RHBT's combination of range through walls and very low power draw. TI positions the CC1121 for cost-effective wireless systems, and its integrated filters remove SAW components that would otherwise dominate the sensor node's RF cost. The 820-960 MHz range covers 868 MHz (Europe) and 915 MHz (North America) with one hardware platform. The node architecture is simple: a low-power MCU manages the application and drives the CC1121 over SPI; the transceiver's hardware packet handling (sync words, FIFOs, CRC) minimizes MCU wake time, and wake-on-RX duty cycling can be implemented for listen-before-talk style protocols. Performance consideration: battery-powered nodes should exploit the transceiver's low-voltage operation and verify crystal warm-up time in the timing budget, since fast TX turnaround affects average current in frequently transmitting sensors.
Recomendado
Wireless Audio and Peripheral Links
Cost-effective wireless peripheral links - such as sub-1 GHz audio-adjacent control channels, remote keypads, and toy/entertainment radio links - need reliable short-range communication at consumer price points. The CC1121RHBT delivers this because Texas Instruments integrated the complete radio, including all channel filters, into a single chip, minimizing external component count and factory RF tuning. Its 274-320 MHz and 410-480 MHz ranges are popular for low-cost control links where 2.4 GHz congestion is a problem, and the transceiver's low-voltage operation suits two- or three-battery products. In these designs the CC1121 typically communicates with a host controller over SPI with a simple proprietary protocol; the hardware FIFOs and packet engine allow one firmware image to serve multiple regional variants by changing only frequency registers and the antenna match. The main design consideration is antenna miniaturization - small PCB antennas in this band need careful matching to preserve output power and sensitivity.
Recomendado
RF Module and Gateway Designs
Sub-1 GHz gateways and radio module makers use the CC1121RHBT as the core radio of pluggable or embedded modules serving multiple regional standards. Because all filtering is integrated, module vendors avoid sourcing SAW filters for every band variant, and the CC1121's four band ranges let a single module PCB target several markets with component substitutions only in the matching network. The exposed-pad VFQFN package supports the robust ground construction modules need for repeatable RF performance over reflow cycles. In a gateway, one or more CC1121 radios attach to a main processor over SPI, handling dense packet traffic with the transceiver's hardware packet engine; the radio's high-performance filtering helps in multi-node networks with many simultaneous transmitters. Designers should allocate PCB area for band-select matching networks and verify regulatory band edges per market using the TI reference designs and test reports as a starting point for certification.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para CC1121RHBT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | CC1125RHBT | CC1120RHBT | CC1200RHBT |
|---|---|---|---|---|
| Package | 32-VFQFN Exposed Pad (RHBT) | 32-VFQFN Exposed Pad (RHBT) - same | 32-VFQFN Exposed Pad (RHBT) - same | 32-VFQFN Exposed Pad (RHBT) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Frequency Coverage | 164-192 / 274-320 / 410-480 / 820-960 MHz | Sub-1 GHz ISM/SRD bands | Standard sub-1 GHz ISM bands | Sub-1 GHz ISM bands (subset) |
| Receiver Performance Class | High performance | Enhanced (highest in family) | High performance | High performance |
| Integrated Filtering (no SAW/IF) | Yes | Yes | Yes | Yes |
| Firmware Compatibility | CC112x register family | CC112x family - compatible | CC112x family - compatible | CC120x register map - driver changes required |
| Target Market | ISM/SRD cost-effective systems | Long-range ISM/SRD links | Mainstream ISM/SRD | Performance ISM/SRD |
Diferenciadores clave
- Widest band coverage in the CC112x family (frente a CC1120RHBT)
- Cost-effective high-performance positioning (frente a CC1125RHBT)
- CC112x register family compatibility (frente a CC1200RHBT)
Notas de diseño
The 32-VFQFN exposed pad is the primary RF ground for the CC1121RHBT. Connect it to the PCB ground plane through an array of at least 9 to 16 vias directly under the pad, and mirror TI's reference design layout for the target band. Keep the antenna matching network components close to RF_N/RF_P with short, impedance-controlled traces, and keep crystal traces short with guard grounding. Because all channel filtering is on chip, layout quality is the main determinant of achieved sensitivity and spurious emissions.
Band-specific performance (output power, sensitivity, spurious levels) depends on the external matching network and crystal tolerance, so do not copy a matching network between frequency ranges. If substituting CC1120/CC1125/CC1200 on the same footprint, remember the CC1200 uses a different register map and requires driver changes; verify firmware before a drop-in swap. Always download the current TI user guide rather than relying on third-party summaries, since band parameter tables are revised.
The CC1121 is designed for very low-power, low-voltage battery operation. Use a clean, low-noise supply: a low-IQ LDO or good LC filtering from a switching rail, with solid decoupling on each supply pin as shown in the TI reference design. In duty-cycled sensor nodes, budget current for crystal start-up and PLL settling on every wake; grouping transmissions into bursts reduces average current compared with frequent short wakeups. Estimated: current consumption per band and sleep-mode figures are in the manufacturer datasheet - consult it for exact values.
Información de cumplimiento
Compliance data not present in the provided web data. Consult the TI product page for CC1121RHBT RoHS/REACH status before ordering.
