CC1121RHBR - Sub-1GHz RF Transceiver, ISM/SRD | TI
Teilenummer: CC1121RHBR ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.62 | $4,62 |
| 10 | $4.16 | $41,60 |
| 100 | $3.65 | $365,00 |
| 500 | $3.2 | $1.600,00 |
| 1.000 | $2.85 | $2.850,00 |
CC1121RHBR Übersicht
A sub-1GHz RF transceiver is an integrated circuit that implements both the transmitter and receiver halves of a proprietary wireless link within one chip, sitting at the top of the wireless connectivity hierarchy: radio transceiver -> RF IC -> analog/RF semiconductor. The CC1121 belongs to TI's CC112x performance family, positioned above the CC1101 and CC1200 series for links that need superior link budget and blocking performance.
Key features include fully integrated RF filters that eliminate costly external SAW and IF filters, an on-chip MCU core with 4 kB ROM and 256 B RAM for packet handling, and a low 2.0 V minimum supply voltage that supports direct operation from lithium coin cells and two-cell NiMH stacks. Low-voltage, low-power operation is central to its design goal of cost-effective wireless systems.
Architecturally, the CC1121 is a high-performance zero-IF transceiver in which channel filtering, frequency synthesis and modem functions are all on-chip. The datasheet describes two operating configurations - low-power mode and high-performance mode - allowing designers to trade current consumption against sensitivity and output power per application need.
Typical applications include ISM (Industrial, Scientific and Medical) and SRD (Short Range Device) band systems such as utility metering, wireless alarm and security sensors, industrial remote controls and telemetry links, where long range and strong blocking immunity matter more than protocol overhead.
For design, take advantage of the exposed-pad VQFN for RF grounding, and select the low-power or high-performance register configuration early since it defines current and sensitivity budgets.
This page synthesizes distributor data, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für CC1121RHBR – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit CC1121RHBR (gleiche Bauform und Footprint) – abweichend in Package, Product Type, Frequency Bands, Supply Voltage.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
CC1125RHBR
✅ Drop-In✓ Auf Lager
$3.9 / Stück
Datenblatt ansehen →CC1120RHBR
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$1.52 / Stück
Datenblatt ansehen →CC1200RHBR
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
CC1121RHBR Technische Daten
| Product Type | Single-chip RF transceiver (TxRx + MCU) |
| Frequency Bands | 164 MHz to 192 MHz, 274 MHz to 320 MHz, 410 MHz to 480 MHz, 820 MHz to 960 MHz |
| Modulation Formats | FSK, GFSK, MSK, OOK |
| Versorgungsspannung | 2 V to 3.6 V |
| On-chip Memory | 4 kB ROM, 256 B RAM |
| Betriebstemperatur | -40C to +85C |
| Gehäuse | 32-VFQFN Exposed Pad (RHB) |
| Montageart | Surface Mount |
| Band Class | General ISM < 1GHz |
| Integrated Filters | Yes (no external SAW/IF filters required) |
| Operating Modes | Low-power mode, High-performance mode |
| Application Bands | ISM and SRD frequency bands |
CC1121RHBR 32-vfqfn exposed pad (rhb) Pinbelegungsleitfaden
Pinbelegung für CC1121RHBR (32-vfqfn exposed pad (rhb)-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für CC1121RHBR.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
CC1121RHBR ist geeignet für 6 Anwendungs: Utility Metering (Water/Gas/Electric), Wireless Alarm and Security Systems, Industrial Telemetry and SCADA Nodes, Smart Home and IoT Sensor Networks, Remote Keyless Entry and RF Remote Controls, Wireless Microphone and Audio Telemetry Links.
Utility Metering (Water/Gas/Electric)
The CC1121RHBR fits utility metering because its four sub-1GHz band coverages (164-192, 274-320, 410-480, 820-960 MHz) let one hardware design serve regional regulatory bands, and its integrated filters remove SAW/IF components that add cost across million-unit meter fleets. Operating from 2.0 V to 3.6 V, it runs directly from a lithium cell without a regulator. In a typical endpoint, the CC1121's on-chip 4 kB ROM / 256 B RAM handles packet framing while the SPI link offloads the host MCU, and the low-power mode configuration minimizes average current so a coin cell lasts the meter's service life. The high blocking immunity of the CC112x family is valuable in dense meter installations.
Empfohlen
Wireless Alarm and Security Systems
Security sensors such as door/window contacts, PIR detectors and panic buttons benefit from the CC1121RHBR's low 2.0 V supply floor, which permits direct two-cell battery operation, and from the -40C to +85C industrial temperature range needed for unheated garages and outdoor sirens. The FSK/GFSK modulation options give robust links through building structure, while OOK supports the simplest, lowest-current sensor variants. Because all channel filters are on-chip, a compact sensor PCB can keep the whole radio under one square centimeter. Wake-on-radio GPIO operation lets the transceiver poll for incoming alarms while the host MCU sleeps, keeping standby current in the microampere class for multi-year battery life.
Empfohlen
Industrial Telemetry and SCADA Nodes
In factory and site telemetry, the CC1121RHBR's 410-480 MHz coverage serves licensed and license-free industrial bands with better propagation than 2.4 GHz through metal-rich environments. The high-performance mode configuration maximizes receiver sensitivity for long cable-free runs between machines, while the low-power mode suits battery-backed remote nodes. The integrated 4 kB ROM / 256 B RAM supports acknowledged packet protocols used in SCADA polling. Its FSK/MSK modulation set supports the constant-envelope schemes common in industrial radio links, and the exposed-pad VQFN provides the low-inductance ground required for stable transmit spurious performance near variable-frequency drives and other noisy industrial equipment.
Empfohlen
Smart Home and IoT Sensor Networks
For proprietary smart-home ecosystems, the CC1121RHBR offers sub-1GHz penetration through walls that 2.4 GHz radios cannot match, covering the 820-960 MHz and 410-480 MHz bands used for regional ISM devices. The 2.0-3.6 V supply range accepts a single lithium coin cell directly, and the on-chip memory (4 kB ROM, 256 B RAM) offloads framing so even a small 8-bit MCU can manage the network stack. OOK mode enables ultra-cheap wake channels, while GFSK carries sensor data. Because TI provides the low-power and high-performance register-mode configurations, designers can standardize on one radio SKU across mains-powered repeaters and battery-only end devices, simplifying logistics and qualification.
Empfohlen
Remote Keyless Entry and RF Remote Controls
The CC1121RHBR serves premium remote-keyless-entry and long-range RF control designs where simple OOK transmitters lack range or security. Operating in the 274-320 MHz and 410-480 MHz regions typical for RKE, its FSK/GFSK capability supports rolling-code and encrypted link layers, while the fast frequency synthesizer enables quick frequency-hopping sequences that resist replay attacks. The 2.0 V supply floor supports coin-cell fobs, and the low-power mode keeps standby draw negligible between button presses. Since all filtering is integrated, fob BOM cost stays low; the exposed-pad 32-VQFN keeps the radio small enough for compact key-shell PCBs alongside the MCU and CR2032 cell.
Empfohlen
Wireless Microphone and Audio Telemetry Links
The 164-192 MHz coverage of the CC1121RHBR spans VHF bands used for wireless microphone, in-ear monitor and assistive-listening systems, where MSK and GFSK modulation support digital audio transport with deterministic latency. The high-performance mode configuration maximizes adjacent-channel selectivity in crowded event spectrum, and the integrated channel filters replace the discrete IF filtering that once dominated such designs. A 2.4-3.6 V rail fits standard rechargeable packs in belt-pack transmitters. Because the modem and packet RAM (256 B) are on-chip, a small host MCU manages encryption and audio buffering, keeping total system cost below that of dedicated broadcast audio radio chipsets.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für CC1121RHBR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | CC1125RHBR | CC1120RHBR | CC1200RHBR |
|---|---|---|---|---|
| Package | 32-VFQFN Exposed Pad (RHB) | 32-VFQFN Exposed Pad (RHB) - same | 32-VFQFN Exposed Pad (RHB) - same | 32-VFQFN Exposed Pad (RHB) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Frequency Coverage | 164-192 / 274-320 / 410-480 / 820-960 MHz | same sub-1GHz band set | same sub-1GHz band set | subset of sub-1GHz bands |
| Performance Class | High-performance CC112x | highest output power in family | base CC112x class (lower than CC1121) | cost-optimized CC12xx class |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Modulation | FSK, GFSK, MSK, OOK | FSK, GFSK, MSK, OOK | FSK, GFSK, MSK, OOK | FSK, GFSK, MSK, OOK |
| External SAW/IF Filters | Not required (integrated) | Not required (integrated) | Not required (integrated) | Not required (integrated) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Link Budget Positioning | High-performance, low-power balance | maximum range / link budget | reduced range, lower cost | short-to-medium range, lowest cost |
Wichtigste Unterscheidungsmerkmale
- Widest band coverage in the CC112x family (vs. CC1200RHBR)
- Cost-optimized for low-power systems (vs. CC1125RHBR)
- Higher performance class than the family base part (vs. CC1120RHBR)
Designhinweise
The CC1121RHBR's exposed pad on the 32-VFQFN is the primary RF ground return; connect it to a solid, unbroken ground plane with a minimum 4x4 via array directly under the pad. TI CC112x reference designs place all RF matching components on the top layer with the ground plane uninterrupted beneath them. Do not route digital SPI signals under the RF matching network, and keep crystal traces short and guarded by ground. Follow the TI CC112x user guide reference layout to pass spurious-emission testing in ISM/SRD bands.
Supply the CC1121RHBR from a clean 2.4 V to 3.3 V rail (within the 2.0-3.6 V range). Transmit current pulses stress the supply, so place a 100 nF ceramic capacitor at each supply pin plus bulk 10 uF decoupling, exactly per the TI CC112x reference design. If sharing a rail with a noisy MCU or DC-DC converter, add an LC or LDO filter stage; supply noise appears directly as phase noise and degraded sensitivity in zero-IF transceivers. Verify operation at end-of-life battery voltage, not just nominal.
The CC1121 datasheet defines two register configuration sets - low-power mode and high-performance mode - that must not be mixed; applying output-power settings from one configuration with channel filters from the other degrades both sensitivity and regulatory compliance. Also, migration from CC1120/CC1125 firmware requires re-checking the register map against the CC1121 datasheet; while the SPI command interface is family-compatible, register-level differences exist. Confirm your band-specific regulatory limits against the actual configured output power before certification.
Compliance-Informationen
Compliance data was not present in the provided verified web data; confirm RoHS/REACH status on the TI product page at https://www.ti.com/product/CC1121.
