CC1021RSST - Narrowband FSK/OOK UHF RF Transceiver | TI
MPN: CC1021RSST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.7 | $7.70 |
| 10 | $6.95 | $69.50 |
| 100 | $6.2 | $620.00 |
| 500 | $5.6 | $2,800.00 |
| 1,000 | $5.05 | $5,050.00 |
CC1021RSST Overview
A narrowband RF transceiver is a wireless communication IC that transmits and receives data on very narrow radio channels, allowing many users to share spectrum with minimal interference. Within the RF system hierarchy (transceiver -> RF IC -> wireless semiconductor), the CC1021 integrates the complete transmit and receive signal path, requiring only a microcontroller, a crystal, and a small number of external passive components to form a complete radio link.
Key features include true single-chip integration of a low-IF receiver and a direct VCO-based transmitter, programmable channel spacing from 50 kHz upward for licensed and unlicensed narrowband networks, and CMOS architecture optimized for very low power and very low voltage battery operation. The exposed-pad VQFN-32 package provides good RF grounding and thermal performance in a compact footprint.
Technically, the CC1021 uses a CMOS RF architecture in which frequency synthesis, modulation, and demodulation are configured through an internal register set, allowing a host MCU to retune channels and data format on the fly. This flexibility makes it suitable for multichannel telemetry where frequency agility is required without hardware changes.
Typical applications include narrowband telemetry in the 433 MHz, 868 MHz, and 915 MHz ISM/SRD bands, utility metering and alarm systems, and industrial remote control where low power consumption extends battery life.
When designing with the CC1021RSST, budget board area for the external RF matching network and crystal circuit, and verify the programmed channel spacing against regional spectral regulations such as ETSI and FCC rules for the target market.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing procurement and engineering teams with a single citable reference.
Drop-in alternatives for CC1021RSST — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CC1021RSST (same form factor and footprint) — differing in Modulation, Package, Product Type, Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesCC1021RSST Specifications
| Product Type | Single-chip UHF RF transceiver, narrowband |
| Frequency Range (Low Band) | 402 MHz to 470 MHz |
| Frequency Range (High Band) | 804 MHz to 960 MHz |
| Modulation | FSK / OOK |
| Channel Spacing | 50 kHz or higher, programmable |
| Target Bands | ISM/SRD 433 MHz, 868 MHz, 915 MHz |
| Technology | CMOS, low power, low voltage |
| Package | 32-VQFN Exposed Pad (RSS) |
| Mounting Type | Surface Mount |
| Configuration | Register-programmable, multichannel |
CC1021RSST 32-vqfn exposed pad (rss) Pin Configuration Guide
Pin configuration for CC1021RSST (32-vqfn exposed pad (rss) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for CC1021RSST.
Refer to the datasheet for full pin configuration.
Typical Applications
CC1021RSST is suitable for 6 applications: Narrowband ISM/SRD Telemetry (433/868/915 MHz), Utility Metering and AMR, Alarm and Security Systems, Industrial Remote Control, Two-Way Data Links and Portables, Wireless Sensor Networks (IoT Nodes).
Narrowband ISM/SRD Telemetry (433/868/915 MHz)
The CC1021RSST is primarily intended for ISM and SRD narrowband telemetry in the 433 MHz, 868 MHz, and 915 MHz bands, which fall inside its 402-470 MHz and 804-960 MHz coverage. Its programmable channel spacing of 50 kHz or higher allows dense multichannel networks, while the single-chip CMOS design minimizes BOM cost and board area. In a typical node, the transceiver sits between the antenna matching network and a host MCU that writes channel and packet-configuration registers; because the radio draws power only during short bursts, battery-powered metering and monitoring endpoints achieve multi-year service life.
Recommended
Utility Metering and AMR
Automatic meter reading (AMR) endpoints benefit from the CC1021RSST's very low power, very low voltage operation, which TI designed specifically for battery-powered wireless applications. In a water or gas meter, the transceiver wakes periodically to transmit consumption records on a programmed 868 MHz or 433 MHz channel and returns to sleep, keeping average current in the microamp range. The 32-VQFN exposed-pad package provides solid RF grounding on compact meter PCBs, and register-programmable frequency agility lets a single hardware design serve different regional bands by firmware change alone.
Recommended
Alarm and Security Systems
Wireless alarm panels and sensors in the 868 MHz SRD band use the CC1021RSST's narrowband FSK link for reliable, interference-resistant communication. Narrowband channels of 50 kHz or more coexist with dense sensor populations, and OOK mode offers a simple, low-power option for one-way sensor transmissions. The single-chip transceiver removes the need for separate TX and RX chains, reducing failure points in security-critical hardware. Its multichannel register programming supports frequency-hopping or polling schemes that improve robustness against jamming and accidental co-channel contention in large installations.
Recommended
Industrial Remote Control
Crane controllers, gate openers, and industrial remote-key systems in the 433 MHz and 915 MHz bands fit the CC1021RSST's frequency coverage and FSK/OOK modulation options. The narrowband architecture delivers better range per milliwatt than wideband ISM links, an advantage for steel-structure environments with obstructed line of sight. Register-programmable multichannel operation allows fleets of controllers to avoid mutual interference by channel assignment, while the low-voltage CMOS design operates from the small battery cells typical of handheld transmitters. The exposed-pad VQFN-32 withstands industrial vibration better than leaded packages.
Recommended
Two-Way Data Links and Portables
Because the CC1021RSST integrates both transmit and receive paths, it suits handheld and portable two-way data terminals that poll a base station and receive configuration or status in return. The low-IF receiver and direct-modulation transmitter maintain consistent narrowband performance at very low supply voltages, compatible with single-cell battery architectures. Multichannel register programming lets the portable retune between talkback and download channels on the fly without hardware changes, and the compact 32-VQFN (RSS) package keeps portable PCB real-estate demands low for ergonomic industrial terminals.
Recommended
Wireless Sensor Networks (IoT Nodes)
Private IoT sensor networks built on narrowband sub-GHz links use the CC1021RSST where regulation favors 868 MHz/915 MHz narrowband channels over congested 2.4 GHz spectrum. Its sub-GHz propagation characteristics deliver longer range with lower wall penetration losses indoors, and the 50 kHz-plus channel spacing supports dozens of independent sensor channels in one deployment. The single-chip CMOS transceiver keeps node BOM cost down at scale, and register-level frequency agility enables dynamic channel selection managed by the host MCU, improving coexistence with other ISM-band traffic in factories and campuses.
Recommended
Recommended Products Summary
Engineering reference data for CC1021RSST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CC1021RSSR | CC1021RTB1 | CC1021RSST1 |
|---|---|---|---|---|
| Package | 32-VQFN Exposed Pad (RSS) | 32-VQFN Exposed Pad (RSS) - same | 32-VQFN Exposed Pad (RSS) - same | 32-VQFN Exposed Pad (RSS) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Frequency Coverage | 402-470 MHz, 804-960 MHz | 402-470 MHz, 804-960 MHz | 402-470 MHz, 804-960 MHz | 402-470 MHz, 804-960 MHz |
| Modulation | FSK / OOK | FSK / OOK | FSK / OOK | FSK / OOK |
| Channel Spacing | 50 kHz or higher, programmable | 50 kHz or higher, programmable | 50 kHz or higher, programmable | 50 kHz or higher, programmable |
| RF Performance | Narrowband single-chip, low power | Identical (same die) | Identical (same base product) | Same family performance |
| Pin Compatibility | CC1021 RSS pinout | Pin-to-pin identical | Pin-to-pin identical | Pin-to-pin identical |
| Drop-in on Existing PCB | Reference design | Yes, no PCB change | Yes, no PCB change | Yes, no PCB change |
Key Differentiators
- True single-chip narrowband integration (vs CC1120)
- Dual-band coverage with one hardware design (vs CC1021RSSR)
- Very low power, very low voltage operation (vs CC1021RTB1)
Design Notes
The CC1021RSST's exposed pad is the primary RF ground and must be connected to a solid ground plane through an array of vias under the VQFN-32 land pattern. Follow the CC1021 reference design layout in the manufacturer datasheet for the crystal, loop filter, and antenna matching network; keep RF traces short and route them over an unbroken ground plane. Poor exposed-pad soldering is the most common cause of marginal sensitivity and spurious emissions in production boards.
The CC1021 is designed for very low power and very low voltage battery operation. Decouple the supply pin with a combination of bulk and 100 nF ceramic capacitors placed as close as possible to the pin, and isolate the RF supply from noisy digital rails of the host MCU. Verify that the programmed TX output power and channel spacing settings comply with the regional ETSI or FCC spectral mask for the 433/868/915 MHz band in the target market.
Do not assume the CC1120 is a drop-in replacement: distributor suggestion lists (e.g., OMO Electronic) recommend CC1120 as a family successor, but it has a different package and register architecture and requires a full board and firmware redesign. Similarly, when ordering substitutes, note that CC1021 suffix variants (RSST/RSSR/RTB1) are electrically identical but differ in delivery form - confirm the packing quantity your production line requires before purchase.
Compliance Information
Compliance status not explicitly stated in the retrieved distributor data; verify via the official TI product page at ti.com/product/CC1021 or request a material declaration from the distributor.
