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Texas Instruments CC8531RHAT
- Part No.:
- CC8531RHAT
- Manufacturer:
- Texas Instruments
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
CC8531RHAT.pdf
- Description:
- IC RF TXRX+MCU ISM>1GHZ 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:288
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Product details
Overview
CC8531RHAT from Texas Instruments is a 2.4 GHz RF System-on-Chip (SoC) optimized for wireless digital audio streaming, supporting up to 4-channel CD-quality uncompressed audio at 48 kHz/24-bit, with USB Audio Device Class (HT1/HS1/MT) compliance and 10.7 ms end-to-end latency. It integrates RF transceiver, baseband processor, flash memory, and I2S/USB/I2C interfaces - deployed in wireless USB headphones, 2.1 speaker systems, and autonomous audio links.
For engineers reviewing the CC8531RHAT datasheet, CC8531RHAT pinout, CC8531RHAT application, or CC8531RHAT equivalent, this page delivers verified technical context on PurePath™ Wireless protocol operation, QFN-40 package integration, USB-powered audio streaming constraints, and validated alternatives for multi-channel wireless audio system design.
Technical Context
The CC8531RHAT implements a proprietary PurePath™ Wireless protocol with adaptive frequency hopping, forward error correction, buffering/retransmission, and error concealment - enabling robust coexistence in dense 2.4 GHz ISM band environments. Its RF section supports shaped 8FSK (5 Mbps) and shaped 2FSK (2 Mbps) modulation with programmable +3.5 dBm output and –83/–86 dBm sensitivity.
Digital audio is handled via configurable I2S (1–4 channels, 32–48 kHz, 16/24-bit) and full-speed USB Audio (32/44.1/48 kHz), with dedicated MCLK/BCLK/WCLK outputs and HID-mappable GPIOs. The device operates autonomously or under external host MCU control via SPI, and supports seamless integration with CC2590 range extender for +11 dBm output and –87 dBm sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 2400–2483.5 MHz - fully compliant with ETSI EN 300 328, FCC Part 15, and ARIB STD-T66 regulations. |
| Data Rate | 5 Mbps (shaped 8FSK) or 2 Mbps (shaped 2FSK) - determines maximum channel count and latency trade-offs in real-time streaming. |
| Audio Latency | As low as 10.7 ms - measured between I2S source and sink interfaces, programmable via PurePath™ Wireless Configurator. |
| Sample Rates | 32, 40.275, 44.1, 48 kHz - 44.1 kHz and 48 kHz supported in both I2S and USB modes; 40.275 kHz not supported in USB mode. |
| Supply Voltage | 3.0–3.6 V - required for CC8531RHAT when powered via USB; LDO needed to meet absolute max ratings. |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade consumer audio equipment including portable speakers and headsets. |
| Package | VQFN-40 (RHA), 6 mm × 6 mm - RoHS-compliant, moisture sensitivity level 3, peak reflow 260°C. |
Pinout & Package
CC8531RHAT uses a 40-pin VQFN (RHA) package with exposed thermal pad requiring solid ground plane connection. Pin functions are shared across CC85xx family but configured per variant: pins 1–2 (xANTN/xANTP) serve as USB D−/D+ in CC8531RHAT (not antenna switch controls), and all AVDD/IOVDD pins must be decoupled per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (xANTN) | USB D− | Differential USB 2.0 full-speed data line; requires 33 Ω series termination and external pull-up on D+. |
| 2 (xANTP) | USB D+ | Differential USB 2.0 full-speed data line; internal pull-up enables USB enumeration without external components. |
| 11 (RSTN) | Active-low Reset | Pulled high internally; asserted low resets SoC state and halts audio streaming until firmware reload. |
| 13–15 (MCLK/BCLK/WCLK) | I2S Master Clock / Bit Clock / Word Clock | Configurable clock outputs driving external DAC/ADC; WCLK supports 31.936–48.096 kHz for precise sample rate alignment. |
| 16–17, 19 (AD0/AD1/AD2) | I2S Data Lines | Support 1–4 channel audio: AD0/AD1 carry stereo; AD2 enables third/fourth channel in 4-channel CC8531 mode. |
| 32–33 (SCL/SDA) | I2C Interface | Used for configuring external codecs, amplifiers, or sensors; requires external 4.7 kΩ pull-ups per TI layout recommendations. |
| 36 (xPAEN) | External PA Enable | 20 mA drive capability; asserts high to enable CC2590 or compatible RF power amplifier for extended range. |
| 38 (xLNAEN) | External LNA Enable | 20 mA drive capability; used with CC2590 or discrete LNA to improve receiver sensitivity in noisy RF environments. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PurePath™ Wireless Protocol | Enables zero-software-development autonomous operation with adaptive frequency hopping, FEC, and retransmission - eliminating need for host MCU in basic USB headphone/headset designs. |
| USB Audio Class Compliance | Supports HT1 (headphone), HS1 (headset), and MT (microphone) topologies as a full-speed USB Audio 1.0 device - plug-and-play with Windows/macOS/Linux without custom drivers. |
| Multi-Channel Audio Support | Hardware-configured for up to 4 independent audio channels via I2S (AD0–AD2), enabling wireless 2.1 speaker systems and surround-sound accessories without external multiplexing. |
| Low-Latency Audio Path | End-to-end latency as low as 10.7 ms - achieved through optimized packetization, hardware-accelerated protocol stack, and direct I2S-to-RF path bypassing software buffers. |
| Coexistence Robustness | Combines adaptive frequency hopping, 20 dB adjacent-channel selectivity (2 Mbps), and error concealment - maintains gapless playback alongside Wi-Fi, Bluetooth, and Zigbee in congested 2.4 GHz environments. |
Applications
| Wireless USB Headphones | Wireless 2.1 Speaker Systems |
|---|---|
|
Use Scenario: Battery-powered over-ear headphones receiving stereo audio from PC or mobile device via USB-C or USB-A adapter. IC Role / Device Role / Timing Role: CC8531RHAT acts as USB Audio Device Class slave, handling USB enumeration, audio packet parsing, I2S generation, and RF transmission to matching receiver IC. Use Value: Delivers CD-quality 48 kHz/24-bit audio with <11 ms latency and no host-side driver development - enabled by built-in HID mapping for volume/play/pause controls. |
Use Scenario: Compact desktop speaker system with subwoofer and satellite speakers using single USB audio source. IC Role / Device Role / Timing Role: CC8531RHAT serves as 4-channel audio transmitter: AD0/AD1 carry left/right front, AD2 carries LFE/subwoofer signal, synchronized via shared WCLK. Use Value: Eliminates analog cabling between subwoofer and satellites while preserving phase coherence and dynamic range - leveraging hardware I2S channel routing and low-jitter clock outputs. |
| Wireless USB Microphones | Autonomous Point-to-Point Audio Links |
|
Use Scenario: Conference microphone array transmitting 48 kHz/24-bit mono or stereo audio to USB-equipped recording interface or VoIP endpoint. IC Role / Device Role / Timing Role: CC8531RHAT operates as USB Audio Device Class microphone (MT topology), digitizing analog input via external ADC and streaming via USB with HID control for mute/tone. Use Value: Achieves studio-grade SNR and THD+N performance without host CPU involvement - USB HID class support enables plug-and-play mute button and LED status feedback. |
Use Scenario: Fixed-installation audio distribution in retail or hospitality, linking source (e.g., media player) to multiple remote speakers without network infrastructure. IC Role / Device Role / Timing Role: CC8531RHAT functions as autonomous protocol master, establishing peer-to-peer link with CC8530/CC8531 receivers using preconfigured firmware images from PurePath™ Wireless Configurator. Use Value: Enables deterministic, low-latency streaming with zero packet loss in multi-device networks - powered by adaptive hopping and buffer management baked into silicon. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2.4 GHz wireless audio SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CC8530RHAT | No USB interface; I2S-only audio interface (1–4 channels); same RF core, latency, and protocol stack. | Suitable for non-USB systems where audio source is I2S-based (e.g., DSP, codec, S/PDIF-to-I2S bridge). | Select CC8530RHAT when USB connectivity is unnecessary and cost reduction or simplified BOM is prioritized. |
| CC2564C | Bluetooth Audio SoC (BR/EDR + LE); supports A2DP, HSP, HFP; no proprietary protocol; lower RF output (+4 dBm) and higher latency (>150 ms). | Targets standards-based Bluetooth audio ecosystems (e.g., smartphones, tablets) rather than proprietary low-latency USB audio links. | Choose CC2564C only when interoperability with standard Bluetooth hosts is mandatory and latency >100 ms is acceptable. |
Compared with CC8530RHAT, CC8531RHAT adds full-speed USB Audio Device Class support and HID functionality - enabling direct PC/mobile connectivity without external USB controller. Compared with CC2564C, CC8531RHAT delivers 10× lower latency and proprietary coexistence mechanisms, but lacks Bluetooth certification and ecosystem compatibility.
Availability
CC8531RHAT is available at Aetrix Electronics and suitable for wireless USB headphones, 2.1 speaker systems, and autonomous point-to-point audio links requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production programs.
Supply support for CC8531RHAT 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 company specializing in analog, embedded processing, and wireless connectivity solutions, with leadership in high-performance audio and low-power RF technologies.
The CC8531RHAT belongs to the PurePath™ Wireless SoC product line, designed specifically for ultra-low-latency, multi-channel wireless digital audio streaming in consumer and professional audio equipment - emphasizing autonomous operation and USB plug-and-play simplicity.
FAQ
What distinguishes CC8531RHAT from CC8530RHAT in terms of interface and use case?
The CC8531RHAT integrates full-speed USB Audio Device Class (HT1/HS1/MT) and USB HID functionality, enabling direct connection to PCs and mobile devices without external USB controllers. In contrast, CC8530RHAT supports I2S-only audio interfacing and requires an external host MCU or USB bridge. For USB-native wireless headphones or microphones, CC8531RHAT eliminates BOM complexity and firmware overhead - making it the only choice among CC85xx variants with native USB audio capability.
Does CC8531RHAT support 4-channel audio over USB, or is that limited to I2S?
CC8531RHAT supports 4-channel audio exclusively over its I2S interface (using AD0, AD1, and AD2 pins); USB Audio Device Class operation is limited to stereo (2-channel) in HT1/HS1/MT topologies per USB Audio 1.0 specification. The 4-channel capability is realized when CC8531RHAT acts as I2S master driving external DACs or amplifiers - for example, in wireless 2.1 speaker systems where AD0/AD1 carry front left/right and AD2 carries LFE. USB remains the control and stereo streaming interface.
What is the minimum latency achievable with CC8531RHAT, and under what conditions?
The CC8531RHAT achieves a minimum end-to-end latency of 10.7 ms, measured between I2S input on the source device and I2S output on the sink device, using uncompressed 16- or 24-bit audio at 48 kHz in 5 Mbps mode. This value is programmable via the PurePath™ Wireless Configurator and requires optimal RF link conditions, fixed sample rate configuration, and disabled audio compression. Latency increases to ~20 ms in 2 Mbps mode or with dynamic sample rate changes.
Can CC8531RHAT operate without an external crystal, and what are the clock requirements?
No - CC8531RHAT requires a 48 MHz fundamental-mode crystal connected to X0/X1 pins, with load capacitance of 15–17 pF, ESR ≤60 Ω, and frequency tolerance of ±50 ppm (including aging and temperature drift). The crystal drives the internal PLL for RF and audio clock generation; no external clock input or oscillator substitution is supported. Omitting or misconfiguring the crystal prevents RF initialization and I2S synchronization.
How does CC8531RHAT handle coexistence with Wi-Fi and Bluetooth in the 2.4 GHz band?
CC8531RHAT employs three coexistence mechanisms: adaptive frequency hopping (AFH) that avoids occupied channels detected via RSSI monitoring, forward error correction (FEC) with interleaving to recover burst errors, and packet retransmission with buffer management. These are implemented in hardware and require no host intervention. Measured adjacent-channel selectivity of 20 dB (2 Mbps) and alternate-channel rejection of 43 dB ensure robust operation even when Wi-Fi access points or Bluetooth headsets occupy nearby channels.
CC8531RHAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- PurePath™ Wireless
- Package/Case:
- 40-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, 8FSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 5Mbps
- Power - Output:
- 11dBm
- Sensitivity:
- -90dBm
- Memory Size:
- -
- Serial Interfaces:
- I2C, I2S, SPI, USB
- GPIO:
- 15
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Receiving:
- -
- Current - Transmitting:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 40-VQFN (6x6)
CC8531RHAT FAQ
1.How can I place an order for CC8531RHAT through Aetrix?
Please submit a Request for Quotation (RFQ) for CC8531RHAT 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 CC8531RHAT reliable?
The price and inventory of CC8531RHAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CC8531RHAT is usually 5 days.
3.What payment methods are accepted for CC8531RHAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CC8531RHAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CC8531RHAT?
CC8531RHAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CC8531RHAT 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 CC8531RHAT?
For technical support, including CC8531RHAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CC8531RHAT requirements.
6.How does Aetrix verify that CC8531RHAT is sourced from the original manufacturer or authorized distributors?
All CC8531RHAT 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 CC8531RHAT meets industry standards.
7.What is the process for return or replacement of CC8531RHAT?
All CC8531RHAT units undergo pre-shipment inspection (PSI). If there is an issue with CC8531RHAT, 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 CC8531RHAT part is unused and in its original packaging.
Return procedure for CC8531RHAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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