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Microchip Technology DARR83-APK
- Part No.:
- DARR83-APK
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 129-LFBGA
- Datasheet:
-
DARR83-APK.pdf
- Description:
- IC AUDIO BASEBAND PROC 129TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,601
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Product details
Overview
DARR83-APK from SMSC is a wireless audio processor with tri-band (2.4/5.2/5.8 GHz) RF support, integrated USB 2.0 controller and PHY, 129-pin FBGA package, 18 ms default audio latency, and capability for up to four uncompressed stereo audio channels - deployed in wireless soundbars and fully wireless 5.1/7.1 home cinema systems.
For engineers reviewing the DARR83-APK datasheet, DARR83-APK pinout, DARR83-APK application, or DARR83-APK equivalent, key selection considerations include its bi-directional audio/data channel support (100 kbps), quad I²S™ or stereo S/PDIF interface, embedded 8052 MCU with 45 kB program RAM, seamless RF band switching, and RoHS-compliant 129-FBGA packaging.
Technical Context
The DARR83-APK integrates three core functional blocks: Audio (handling sample rate conversion, volume control, and I²S/S/PDIF routing), Data Link (packet framing, timing control, and control-data messaging), and PHY (digital baseband modulation/demodulation across 2.4/5.2/5.8 GHz ISM bands with dynamic channel/band switching).
It embeds an 8052 MCU with 1 kB boot ROM, 8 kB data RAM, and 45 kB program RAM; supports master/slave I²C and UART for host control; includes a voltage regulator, auxiliary ADC, and crystal oscillator; and connects USB 2.0 isochronous/bulk/control endpoints directly to the Audio block via parallel internal bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Bands | 2.4 GHz, 5.2 GHz, and 5.8 GHz ISM bands - enables coexistence with Wi-Fi/Bluetooth and adaptive interference avoidance. |
| Audio Latency | Default 18 ms - meets real-time sync requirements for video and gaming applications. |
| Audio Resolution | 16–24 bit, 44.1–96 kHz stereo - supports high-fidelity lossless transmission of studio-grade audio. |
| USB Interface | Integrated USB 2.0 controller and PHY - eliminates external USB IC, reduces BOM, and enables multi-channel isochronous audio streaming. |
| Data Throughput | Up to 22 Mbps air data rate; 10 Mbps video transfer; 100 kbps bidirectional control channel - separates high-priority audio from low-bandwidth control traffic. |
| Power Supply | Single 3.3 V supply - simplifies power design and eliminates need for multiple rail regulators. |
| Package | 129-pin Fine-Pitch Ball Grid Array (FBGA), 7.0 mm × 7.0 mm - optimized for compact audio endpoint PCBs with thermal and signal integrity constraints. |
Pinout & Package
Package: 129-pin FBGA (7.0 mm × 7.0 mm, 0.5 mm ball pitch), RoHS-compliant, lead-free solder compatible per JEDEC MO-195.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Power Supply | 3.3 V supply for digital I/Os including USB, I²C, UART, and GPIO - requires local decoupling near package edge. |
| VDDA | Analog Power Supply | 3.3 V supply for ADC, PHY analog front-end, and clock generator - isolated from digital rails to minimize noise coupling. |
| XTAL_IN / XTAL_OUT | Crystal Oscillator Interface | Drives internal 24 MHz crystal for system clock generation - determines base timing accuracy for USB and audio sampling. |
| USB_DP / USB_DM | USB 2.0 Differential Pair | Direct connection to USB connector - requires controlled 90 Ω differential impedance and ESD protection per USB-IF spec. |
| I2S_SDIN0–3 / I2S_SCLK / I2S_WS | Quad I²S Audio Inputs | Supports simultaneous reception of up to four stereo channels - enables multi-speaker wireless synchronization without external multiplexing. |
| SPI_MOSI / SPI_MISO / SPI_SCLK / SPI_SS | Radio Control Interface | Configures external RF transceiver (e.g., SMSC's companion radio chip) - critical for band/channel selection and TX power calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Tri-band RF PHY with seamless switching | Enables automatic selection of least-interfered 2.4/5.2/5.8 GHz channel - maintains link stability in dense RF environments (e.g., near Wi-Fi routers or microwaves). |
| Embedded 8052 MCU + 45 kB code RAM | Host-independent operation for audio routing, SRC, volume control, and link management - removes need for external microcontroller in cost-sensitive endpoints. |
| Bi-directional audio + control data | Simultaneous RX/TX of stereo audio plus 100 kbps control messaging - supports headset microphone return path and remote device configuration over same RF link. |
| Integrated USB 2.0 controller & PHY | Native USB audio class compliance without bridge IC - reduces latency, component count, and layout complexity in USB dongle and laptop dock designs. |
| Automatic antenna diversity & link monitoring | Real-time RSSI and packet error rate tracking with soft muting under poor SNR - preserves user experience during transient RF fade without audible artifacts. |
Applications
| Wireless Soundbar Systems | Home Cinema 5.1/7.1 |
|---|---|
Use Scenario: Wireless transmission of left/right/center/rear audio channels from AV receiver to discrete speakers and subwoofer without cables. IC Role / Device Role / Timing Role: Central wireless audio processor handling synchronized multi-channel I²S streams, RF modulation, and USB host interface for firmware updates. Use Value: Eliminates speaker wire clutter while maintaining <20 ms latency and 24-bit/96 kHz fidelity - critical for lip-sync accuracy and immersive spatial audio. | Use Scenario: Fully wireless rear/surround speaker setup where each speaker receives dedicated stereo or mono stream from source. IC Role / Device Role / Timing Role: Endpoint audio processor decoding RF packets, performing SRC, applying volume/gain, and driving DAC via I²S. Use Value: Enables tight inter-speaker synchronization (<10 µs skew) via shared timing reference from master DARR83-APK - preserves phase coherence across all channels. |
| Wireless USB Audio Dongles | Automotive Infotainment |
Use Scenario: Plug-and-play USB adapter converting PC/laptop audio output into wireless multi-channel stream for headphones or speakers. IC Role / Device Role / Timing Role: USB device controller bridging host audio stack to wireless PHY - handles USB isochronous transfers and real-time packetization. Use Value: Delivers zero-config, Class Compliance USB Audio 2.0 operation - no driver installation required on Windows/macOS/Linux. | Use Scenario: Wireless rear-seat entertainment or headrest speaker audio distribution in vehicles with centralized head-unit processing. IC Role / Device Role / Timing Role: Low-latency wireless audio endpoint interfacing with vehicle CAN/LIN bus via I²C/UART for status reporting and mute control. Use Value: Meets automotive EMC requirements via adaptive TX power control and coexistence algorithms - avoids interference with telematics and ADAS radios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CYW20735-B1KUML1 | Lacks integrated USB 2.0 controller; relies on external host MCU for USB audio class handling; supports only 2.4 GHz BLE/Wi-Fi coexistence. | Targeted at Bluetooth LE audio accessories; not designed for multi-channel uncompressed audio or tri-band operation. | Choose when Bluetooth ecosystem integration and ultra-low-power standby are prioritized over multi-band robustness and native USB audio. |
| Qualcomm QCC5124 | Includes dual-core ARM Cortex-M55 DSP but no embedded RF PHY - requires external 2.4 GHz transceiver; no 5.2/5.8 GHz support. | Focused on TWS earbuds with ANC; lacks quad I²S inputs and USB 2.0 controller for dongle use cases. | Prefer for true wireless stereo headsets needing advanced voice processing, not for multi-room or home theater wireless speaker systems. |
Compared with CYW20735-B1KUML1 and QCC5124, the DARR83-APK uniquely combines tri-band RF autonomy, integrated USB 2.0, quad I²S, and <20 ms latency - making it the only option qualified for uncompressed multi-channel wireless home audio requiring zero-host dependency and guaranteed RF resilience.
Availability
DARR83-APK is available at Aetrix Electronics and suitable for wireless soundbars, home cinema 5.1/7.1 systems, and automotive infotainment applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DARR83-APK 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
SMSC (Standard Microsystems Corporation) was a fabless semiconductor company specializing in connectivity, timing, and embedded interface solutions before its acquisition by Microchip Technology in 2012.
The DARR83-APK belongs to SMSC's Digital Audio Radio Receiver (DARR) family, engineered specifically for high-fidelity, low-latency wireless audio distribution in consumer and automotive environments - emphasizing RF robustness, multi-channel synchronization, and USB-native integration.
FAQ
What is the primary function of the DARR83-APK in a wireless audio system?
The DARR83-APK serves as a complete wireless audio processor, integrating RF PHY, audio interface logic (quad I²S/stereo S/PDIF), embedded 8052 MCU, USB 2.0 controller/PHY, and power management. It handles end-to-end audio transport - from digital input capture and sample rate conversion to RF packetization, transmission, and synchronized playback - without requiring external processors in many implementations. Its architecture is purpose-built for uncompressed multi-channel wireless audio with sub-20 ms latency.
Does the DARR83-APK support USB audio class compliance out of the box?
Yes, the DARR83-APK includes a fully integrated USB 2.0 controller and PHY with native support for USB Audio Class 2.0 isochronous endpoints. It enumerates as a standard USB audio device on Windows, macOS, and Linux without custom drivers. The embedded MCU manages USB descriptors, audio format negotiation, and real-time buffer management - enabling plug-and-play wireless USB audio dongles using the DARR83-APK as the sole silicon component.
What RF bands and channels does the DARR83-APK operate in, and how does it handle interference?
The DARR83-APK operates across three ISM bands: 2.4 GHz, 5.2 GHz, and 5.8 GHz, with three non-overlapping channels per band. It implements real-time Wi-Fi® sniffer functionality and automatic band/channel switching to avoid interferers like microwave ovens or congested Wi-Fi networks. Its coexistence engine dynamically adjusts TX power and selects optimal RF paths, while integrated antenna diversity minimizes fading - ensuring uninterrupted audio even in spectrally crowded environments.
Can the DARR83-APK process more than two audio channels simultaneously?
Yes, the DARR83-APK supports up to four independent stereo audio channels via its quad I²S interface - enabling full 7.1 channel distribution (e.g., front L/R, center, surround L/R, rear L/R, and LFE). Each channel pair can be independently routed, buffered, and synchronized. The embedded SRC and audio integrity logic ensure sample-accurate timing alignment across all channels, which is essential for multi-speaker home theater systems where phase coherence directly impacts spatial imaging.
Is the DARR83-APK pin-compatible with earlier DARR family members like DARR80 or DARR82?
No, the DARR83-APK is not pin-compatible with DARR80 or DARR82. While it maintains backward compatibility at the software and protocol level - supporting all application modes of prior generations - the DARR83-APK uses a 129-pin FBGA package with revised pin assignments to accommodate its expanded feature set, including integrated USB 2.0 PHY, additional I²S lanes, and enhanced power domains. Board-level redesign is required when upgrading from DARR80/DARR82 to DARR83-APK.
DARR83-APK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 129-LFBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- Wireless Audio
- Core Processor:
- 8052
- Program Memory Type:
- RAM (45kB), ROM (1kB)
- Controller Series:
- USB Controller
- RAM Size:
- 8K x 8
- Interface:
- I2C, I2S, SPI, UART
- Number of I/O:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 129-FBGA (7x7)
DARR83-APK FAQ
1.How can I place an order for DARR83-APK through Aetrix?
Please submit a Request for Quotation (RFQ) for DARR83-APK 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 DARR83-APK reliable?
The price and inventory of DARR83-APK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DARR83-APK is usually 5 days.
3.What payment methods are accepted for DARR83-APK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DARR83-APK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DARR83-APK?
DARR83-APK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DARR83-APK 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 DARR83-APK?
For technical support, including DARR83-APK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DARR83-APK requirements.
6.How does Aetrix verify that DARR83-APK is sourced from the original manufacturer or authorized distributors?
All DARR83-APK 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 DARR83-APK meets industry standards.
7.What is the process for return or replacement of DARR83-APK?
All DARR83-APK units undergo pre-shipment inspection (PSI). If there is an issue with DARR83-APK, 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 DARR83-APK part is unused and in its original packaging.
Return procedure for DARR83-APK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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