Dual mode Bluetooth microcontroller is capable of implementing an audio transmitter that supports multiple audio input interfaces such as USB, SDIO, MIC, Line-in, SPDIF, and SPI/I2S. This capability allows the device to connect seamlessly with external audio sources including TVs, computers, and stereo systems. After receiving the audio signal, the transmitter delivers the sound to compatible Bluetooth headsets, speakers, and other receiving devices. In wireless audio transmission, this device serves various functions: As an A2DP source device, it supports wireless transmission of high-quality stereo audio to Bluetooth headphones. As an HFP Audio Gateway (AG), it enables voice communication with Bluetooth headphones via SCO/eSCO links. Additionally, the device supports the LE Audio standard, including Broadcast Audio Stream (BIS) and Connectionless Audio Stream (CIS), allowing efficient transmission of audio data from multiple sources to Bluetooth headphones and delivering a stable and high-quality wireless audio experience. The rich set of interfaces and support for multiple Bluetooth roles ensure the system's flexibility and compatibility, meeting the needs of a wide range of audio application scenarios.

The RTL87x3BFx series chips are designed specifically for Realtek's dual-mode Bluetooth Data-Transfer solutions, featuring a complete built-in Bluetooth protocol stack that supports GATT, SPP, and iAP protocols, while simultaneously supporting BR/EDR Slave, BR/EDR Master, BLE Peripheral and BLE Central roles. The chips connect to external controllers via serial interfaces and offer a rich set of flexible control commands, allowing devices to easily integrate Bluetooth functionality.
Additionally, the RTL87x3BFx series provides Bluetooth SoC Data Transfer SDK, which facilitates customization and further development of solutions, flexibly addressing diverse functional requirements for different application scenarios.

Dual mode Bluetooth microcontroller can be used to implement an audio receiver  solution. It is not only capable of receiving signals from an audio transmitter, but also supports various audio input/output interfaces such as MIC, speaker, and SPI/I2S. This audio receiver serves multiple roles in wireless audio transmission. As an A2DP receiver, it can receive and play high-quality stereo audio transmitted from a mobile phone; as an HFP hands-free device (HF), it enables voice communication via the SCO/eSCO link. Additionally, the device supports the LE Audio standard, efficiently receiving both BIS and CIS audio, thereby providing a stable and high-quality wireless audio experience.

The RTL87x3, as an Auracast™ Transmitter, supports a variety of audio inputs such as USB, Line-in, SPDIF, and microphone, and can also connect to external audio processors through interfaces like I2S and SPI. While transmitting one or more audio streams for real-time listening by Auracast™ Receivers, it simultaneously broadcasts device names, audio content, and codec configuration information for Auracast™ Assistant devices to view and select.

The RTL8762EMF chip is specifically designed for smart locks, providing Bluetooth data passthrough functionality to enable wireless communication between devices.

As an Auracast™ Assistant, the RTL87x3 supports a variety of interfaces such as I8080, QSPI, etc, enabling flexible connections with various screens for intuitive browsing and control operations. The device will actively scan broadcast packets from surrounding Auracast™ transmitters and display the scanning results in real-time. After the user chooses a target channel, the Auracast™ Receiver will receive and play audio based on the configuration parameters provided by the Auracast™ Assistant.

Realtek's single-mode BLE SoC and dual-mode BT SoC platforms provide robust Bluetooth communication capabilities, integrating mainstream display interfaces and image processing engines within the chip. Coupled with a wealth of peripheral interfaces like SPI, I2C, CAN, PWM, and Keyscan, these platforms enable developers to fully unleash their creativity. The comprehensive product family makes it easy for developers to choose suitable and competitive solutions.
The Realtek SDK includes a complete user interface development toolkit, allowing developers to quickly bring their ideas to life. 

The Realtek RTL87x2G integrates USB 2.0 High-Speed and 2.4GHz wireless interfaces within a ‌single-chip architecture,‌ delivering a smooth ‌8K user experience‌ with ‌ultra-low latency‌‌. Additionally, its rich peripheral interfaces such as SPI, QDecoder, Keyscan, I2C, GPIO, and PWM enable developers to add advanced features for product differentiation while maintaining excellent power performance. The chip, combined with the mature and comprehensive Realtek SDK, development documentation, and related tools, allows developers to quickly realize their creative ideas.

The RTL8762CKF/RTL8762DKF-VS are dedicated control chips for smart locks, primarily responsible for connecting and managing various peripheral modules to implement basic lock functions. These low-power, fast-response chips do not support security features like fingerprint recognition and must be paired with a dedicated security chip to form a complete smart lock solution.

Dual mode Bluetooth microcontroller can be utilized to build an audio transceiver solution that adopts a dual-chip architecture. In this design, two RTL87x3 chips serve as the audio transmitter and audio receiver, respectively, with bidirectional data communication achieved via SPI or I2S interfaces. It features a dual-chip architecture, with two RTL87x3 chips operating respectively as the audio transmitter and the audio receiver, enabling bidirectional data communication via SPI or I2S interfaces. In addition, the solution facilitates seamless collaboration with external processors through the UART interface, supporting stable wireless audio data transmission between multiple devices. This design enhances system scalability and allows for flexible integration with a variety of external processors to meet a broad range of application requirements.

Bluetooth dual-mode Turnkey solution The RTL8761ATT is a highly integrated dual-mode Bluetooth transmission chip with a UART interface, embedded with the SPP Server/GATT Server Bluetooth protocol stack, and supports BR/EDR Master and BLE Peripheral roles.

The RTL8761ATT provides custom Data Transfer commands. The main control chip can invoke the built-in SPP and GATT data transfer functions of the RTL8761ATT using these instructions, thereby eliminating the need for Bluetooth protocol stack transplantation at the main control end.

Furthermore, RTL8761ATT also provides usage instructions and examples for custom Data Transfer command, helping developers quickly complete the development of the data transfer function at the master control end.

As an Auracast™ Receiver, the RTL87x3 sets up a connection with the Auracast™ auxiliary device and configures based on the user's selection in the interactive interface, achieving real-time reception and playback of the selected broadcast audio.

Thread Border Routing Solutions: RTL8771GUV and RTL8771HTV
This solution supports Thread RCP products connecting to host devices such as PCs, TVs, speakers, and set-top boxes via USB or UART interfaces. Combined with the host-side Thread protocol stack and Wi-Fi/Ethernet functionality, it implements Thread Border Router functionality for cross-network communication.
Matter over Thread Device Solutions: RTL8777GKF and RTL8772GWP
This solution is suitable for Matter over Thread end devices and can be integrated into home and industrial control products, such as washing machines, air conditioners, sockets, switches, lighting, door locks, and curtains.
Thread Border Routing SoC Solutions: RTL8772GWP
This chip is not only suitable for Thread end devices but can also be used to build Thread border routers, providing a complete SoC solution without relying on host devices such as PCs, TVs, speakers, and set-top boxes. 

The RTL8762 series Bluetooth Mesh solution supports the combination of advertising and GATT connections to build a mesh network, enabling the interconnection of all devices in smart home scenarios.

RTL8772GWF & RTL8762GKH are Bluetooth SoC Solutions optimized for smart locks.
RTL8772GWF features a Real-M300V 125MHz MCU (Cortex-M55 compatible) with ample SRAM resources to support fingerprint algorithm processing. It integrates hardware-level security mechanisms like Trust Zone and has obtained PSA-L2 certification, providing financial grade security for smart door lock applications. The QFN88 package offers up to 56 general purpose GPIOs, supporting rich peripheral interfaces through pin multiplexing, making it suitable as a single-chip solution for smart door locks.
RTL8762GKH also provides sufficient computing power for fingerprint algorithms while maintaining PSA-L2 security level. Its compact QFN48 package is designed for main control solutions requiring fewer peripheral interfaces.
Realtek partners with financial grade security solution providers to deliver complete security solutions from chip to system level, accelerating smart door lock product development and deployment.

Realtek offers flexible HMI system solutions with mature and stable UI designs and efficient integration technologies, helping a wide range of clients to quickly complete technology selection and enter the rapid development and acceptance phase based on their specific needs.
For gateway devices, Realtek provides cost-effective dual-frequency solutions, ensuring 100% uptime for gateway devices such as 15.4/BLE Mesh, reducing the probability of event loss. For clients with high QoS requirements, Realtek offers Ethernet interfaces to ensure more stable communication between long-distance nodes. CAN and other interface technologies provide integrated advantages for industrial users and vehicle application scenarios.
Realtek has integrated a series of mature SDKs including Wi-Fi, LWIP, Thread, Matter, Classic Bluetooth, and BLE Mesh. In terms of UI support, Realtek offers several UI engines such as Honey GUI, RVD (Realtek Visual Designer), and LVGL (Light and Versatile Graphics Library) to meet different design requirements according to client needs.

For Apple Find My tag, Gsensor and buzzer are two essential peripheral components. The typical architecture diagram is as follows:

Realtek smart watch solution based on RTL8773E uses a single BT SoC as the main controller. It connects to peripherals via interfaces such as SPIC, I2C, SPI, GPIO, I8080, MIC, and DAC, and connects to phones via Bluetooth to create a highly integrated smart watch solution.
Realtek provides reference designs, SDK, and toolchains, characterized by high integration and ease of development.

The RTL8762CMF/RTL8762EMF is a Bluetooth Low Energy SoC solution specifically designed for low-power applications. With its outstanding power management, it significantly extends the battery life of devices, making it the preferred choice for power-sensitive products. 
The RTL8762CMF/RTL8762EMF can be quickly configured via AT commands, and supports BLE Peripheral and Central Roles, eliminating the need for complex development processes and shortening the product time-to-market. 
Additionally, the RTL8762CMF/RTL8762EMF offers BLE SoC Data Transfer SDK, which allows users to customize and further develop their solutions, flexibly meeting diverse functional requirements for different application scenarios.

Dual mode Bluetooth microcontroller can be used to build an audio transceiver solutions. Compared to the dual-chip architecture, it utilizes a single-chip architecture that integrates both an audio transmitter and a receiver. The advantage of this solution lies in its careful optimization of system parameters, achieving a good balance between cost, bandwidth, and functionality, while integrating both transmission and reception functions, thereby reducing overall costs and simplifying the development process.