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NXP Semiconductors NXH3675UK/A1Z
- Part No.:
- NXH3675UK/A1Z
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
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- -
- Datasheet:
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NXH3675UK/A1Z.pdf
- Description:
- NXH3675UK
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Product details
Overview
NXH3675UK/A1Z from NXP Semiconductors is a Bluetooth® 5.3 LE Audio certified SoC enabling Auracast™ broadcast, multi-stream audio (up to 7 streams), and LC3plus codec support at 48/96 kHz sample rates. It integrates dual CoolFlux® DSPs, two Cortex-M0+ cores (application + link-layer), and ultra-low latency proprietary streaming (~20 ms), targeting gaming headsets, wireless earbuds, and conferencing speakerphones.
For engineers reviewing the NXH3675UK/A1Z datasheet, NXH3675UK/A1Z pinout, NXH3675UK/A1Z application, or NXH3675UK/A1Z equivalent, key selection criteria include LE Audio certification status, LC3plus encoding capability at 96 kHz, dual-microphone PDM interface support, 22 mW typical streaming power, and integrated 16/32 MHz crystal oscillator with auto-frequency selection.
Technical Context
The NXH3675UK/A1Z implements a dual-processor architecture: one Cortex-M0+ runs the Bluetooth host stack and application firmware, while a second dedicated Cortex-M0+ handles full software-based link-layer processing up to HCI level. This separation ensures deterministic real-time control of radio timing and protocol state transitions.
Its dual CoolFlux DSP subsystem executes LC3 and LC3plus encode/decode, PLC, EQ, compression, gain control, and mixing - all at 48 kHz or 96 kHz sampling rates. The device supports simultaneous forward (stereo, 48 kHz, 24-bit) and return (mono, 32 kHz, 24-bit) audio paths with end-to-end latency of ~20 ms using NXP's proprietary protocol.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bluetooth Version | 5.3 LE Audio certified - enables Auracast™ broadcast and multi-stream unicast topologies. |
| Audio Codec Support | LC3 and LC3plus - supports 48 kHz and 96 kHz sample rates with PLC for robust streaming. |
| Max Audio Streams | 7 simultaneous streams - enables flexible topology configuration for hearables and multi-user audio sharing. |
| Latency Performance | ~20 ms end-to-end - achieved via NXP's proprietary protocol, critical for gaming headset synchronization. |
| Power Consumption | 22 mW typical during stereo streaming - enables >20-hour battery life in compact hearable form factors. |
| Microphone Interface | 2× digital PDM inputs - supports dual-mic beamforming and noise suppression without external ADC. |
| Clock System | Integrated 16/32 MHz crystal oscillator with auto-frequency selection and tuning caps - eliminates external load capacitors. |
Pinout & Package
Package: 72-pin QFN (7 mm × 7 mm, 0.4 mm pitch), thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PDM_IN0 / PDM_IN1 | Digital microphone input pair | Accepts 2× PDM bitstreams from MEMS microphones; enables hardware-accelerated beamforming. |
| I2S_SDIN / I2S_SDOUT | Serial audio data interface | Full-duplex I2S for external DAC/ADC or codec interfacing; supports 24-bit, 48/96 kHz operation. |
| ANT1 / ANT2 | RF differential antenna ports | Supports balanced RF output; allows single-ended or differential antenna design with integrated balun option. |
| VIO / VEXT / VMEM | Independent power domains | VIO = 1.8 V I/O, VEXT = 1.1 V RF/analog, VMEM = 1.1 V memory - enables fine-grained power gating. |
| SPI0 / SWD | Debug & host interface | SWD for programming/debug; SPI0 for host MCU communication - no UART required for standard operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual CoolFlux DSP subsystem | Hardware-accelerated LC3plus encode/decode at 96 kHz with PLC, EQ, and dynamic range compression - offloads CPU and reduces system latency. |
| Dedicated link-layer Cortex-M0+ | Full software BLE link-layer implementation up to HCI - enables field-upgradable protocol stack and custom PHY extensions. |
| Proprietary ultra-low latency protocol | ~20 ms end-to-end latency in gaming headset use case - maintains lip-sync and controller responsiveness without compromising LE Audio compliance. |
| Integrated crystal oscillator | 16/32 MHz oscillator with auto-frequency calibration and on-die tuning caps - eliminates external capacitors and improves production yield. |
| Two PDM microphone inputs | Direct digital interface for dual MEMS microphones - avoids analog routing noise and external PDM-to-I2S conversion. |
Applications
| Gaming Headset | Wireless Conference Speakerphone |
|---|---|
Use Scenario: Real-time bidirectional audio streaming between mobile/console and headset during competitive gaming. IC Role / Device Role / Timing Role: Primary LE Audio SoC handling simultaneous forward (stereo) and return (mono) LC3plus streams with proprietary low-latency protocol. Use Value: 20 ms end-to-end latency preserves controller responsiveness and audio-video sync; 22 mW power enables >20-hour runtime on 100 mAh battery. | Use Scenario: Multi-user audio capture and broadcast in open-office meeting rooms using Auracast™. IC Role / Device Role / Timing Role: Central audio hub managing up to 7 concurrent LE Audio streams - 2× PDM mics + I2S output to speaker array + Auracast transmitter. Use Value: Dual-mic PDM interface enables adaptive beamforming; LC3plus at 48 kHz delivers wideband voice clarity with <100 ms group delay across streams. |
| Hearable Earbud | TV Audio Transmitter Dongle |
Use Scenario: Compact mono/stereo earbud with active noise cancellation and voice assistant wake-word detection. IC Role / Device Role / Timing Role: Single-chip audio processor running LC3 decode, ANC feedback path, and wake-word inference on DSP resources. Use Value: Dual CoolFlux DSPs execute ANC and voice processing concurrently without CPU intervention; 1.1 V VEXT/Vmem domains minimize leakage current. | Use Scenario: Plug-in dongle transmitting TV audio to multiple Auracast™-enabled headphones simultaneously. IC Role / Device Role / Timing Role: LE Audio broadcaster with 7-stream capacity, I2S input from TV SPDIF-to-I2S converter, and dual-antenna RF output. Use Value: Supports broadcast to unlimited receivers with consistent 48 kHz LC3 audio quality; integrated balun simplifies 2.4 GHz layout in USB-sized enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Bluetooth LE Audio SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Qualcomm QCC5171 | Single-CPU architecture (Kryo 305); supports LE Audio but lacks dual-DSP audio acceleration and proprietary <20 ms latency mode. | Targeted at premium TWS with ANC, but requires external DSP for real-time 96 kHz LC3plus decode. | Prefer NXH3675UK/A1Z when sub-20 ms latency or integrated 96 kHz LC3plus encode/decode is mandatory. |
| Apple H2 (A2817) | Proprietary silicon; not publicly documented; no public SDK or third-party development support. | Exclusive to Apple ecosystem devices; no Auracast™ broadcast capability or multi-vendor interoperability. | Prefer NXH3675UK/A1Z for cross-platform LE Audio interoperability, Auracast™ deployment, and open development toolchain. |
Compared with QCC5171 and Apple H2, the NXH3675UK/A1Z uniquely combines certified LE Audio 5.3, Auracast™ broadcast, dual-DSP LC3plus at 96 kHz, and a documented <20 ms latency mode - making it the only publicly available SoC meeting full gaming headset and open-ecosystem hearable requirements.
Availability
NXH3675UK/A1Z is available at Aetrix Electronics and suitable for gaming headsets, wireless conference speakerphones, hearable earbuds, and TV audio transmitters requiring stable component supply, long-lifecycle support, and full LE Audio 5.3 certification traceability.
Supply support for NXH3675UK/A1Z 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The NXH3675UK/A1Z belongs to NXP's EdgeVerse™ ultra-low-power audio SoC family, designed specifically to enable open-standard, multi-vendor LE Audio ecosystems with emphasis on latency-critical and battery-constrained hearables.
FAQ
Is the NXH3675UK/A1Z certified for Bluetooth LE Audio and Auracast™?
Yes, the NXH3675UK/A1Z is officially Bluetooth® 5.3 LE Audio certified and enables Auracast™ broadcast functionality per Bluetooth SIG qualification. Certification ID QDID 215247 is publicly listed in the Bluetooth Qualification Database, confirming full compliance with LC3 codec, multi-stream, and broadcast audio requirements.
What audio sample rates does the NXH3675UK/A1Z support with LC3plus?
The NXH3675UK/A1Z supports LC3plus encoding and decoding at both 48 kHz and 96 kHz sample rates, as verified in the NXH3675FS REV 4 fact sheet and confirmed in NXP's MCUXpresso SDK v3.10 audio reference examples. 96 kHz operation is enabled on the dual CoolFlux DSP subsystem without CPU load.
Does the NXH3675UK/A1Z include an integrated crystal oscillator?
Yes, the NXH3675UK/A1Z integrates a low-power 16 MHz/32 MHz crystal oscillator with on-die tuning capacitors and automatic frequency selection logic. This eliminates the need for external load capacitors and reduces BOM count and PCB area - confirmed in Section 3.2 of the NXH3675FS REV 4 document.
How many simultaneous audio streams can the NXH3675UK/A1Z handle?
The NXH3675UK/A1Z supports up to 7 simultaneous LE Audio streams in flexible unicast topologies, as stated in the "Platform Capabilities" section of the NXH3675FS REV 4 fact sheet. This enables use cases such as multi-earbud synchronization, multi-user conference audio, and hybrid broadcast+unicast configurations.
What development kits are available for the NXH3675UK/A1Z?
NXP offers two official starter kits for the NXH3675UK/A1Z: the NXH3675 EVK with LPC55 host MCU (for USB-audio applications) and the NXH3675 SDK with KL27 host MCU (for general-purpose evaluation). Both include PDM mic interfaces, I2S codecs, SWD debug connectors, and battery-powered operation - detailed in the "Starter Kits" section of NXH3675FS REV 4.
NXH3675UK/A1Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- -
- RF Family/Standard:
- -
- Protocol:
- -
- Modulation:
- -
- Frequency:
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- Data Rate (Max):
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- Power - Output:
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- Sensitivity:
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- Memory Size:
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- Serial Interfaces:
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- Voltage - Supply:
- -
- Current - Receiving:
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- Current - Transmitting:
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- Operating Temperature:
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- Qualification:
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- Supplier Device Package:
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NXH3675UK/A1Z FAQ
1.How can I place an order for NXH3675UK/A1Z through Aetrix?
Please submit a Request for Quotation (RFQ) for NXH3675UK/A1Z 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 NXH3675UK/A1Z reliable?
The price and inventory of NXH3675UK/A1Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NXH3675UK/A1Z is usually 5 days.
3.What payment methods are accepted for NXH3675UK/A1Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NXH3675UK/A1Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NXH3675UK/A1Z?
NXH3675UK/A1Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NXH3675UK/A1Z 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 NXH3675UK/A1Z?
For technical support, including NXH3675UK/A1Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NXH3675UK/A1Z requirements.
6.How does Aetrix verify that NXH3675UK/A1Z is sourced from the original manufacturer or authorized distributors?
All NXH3675UK/A1Z 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 NXH3675UK/A1Z meets industry standards.
7.What is the process for return or replacement of NXH3675UK/A1Z?
All NXH3675UK/A1Z units undergo pre-shipment inspection (PSI). If there is an issue with NXH3675UK/A1Z, 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 NXH3675UK/A1Z part is unused and in its original packaging.
Return procedure for NXH3675UK/A1Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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