The Realtek RTL8761AUV is a highly integrated single-chip Bluetooth 2.1/3.0/4.0 controller with a USB interface. It combines BT Protocol Stack (LM, LL, and LE), BT Baseband, modem, and BT RF in a single chip.
The RTL8761AUV Bluetooth controller is compatible with Bluetooth core specification v4.0, and supports dual mode (BR/EDR + AMP + Low Energy Controllers). It is compatible with previous versions, including v2.1 + EDR and v3.0 + HS. For BR/EDR, it supports scatternet topology and allows active links in slave mode and master mode. For Low Energy, it supports multiple states and allows active links in master mode. The links in BR/EDR and LE can be active simultaneously.
General
32-pin QFN
Bluetooth single chip
Host Interface
USB
Bluetooth Controller
Compatible with Bluetooth v2.1 and v3.0 Systems
Supports Bluetooth 4.0 Low Energy(BLE)
Integrated MCU to execute Bluetooth protocol stack
Supports all packet types in basic rate and enhanced data rate
Supports SCO/eSCO link
Supports Secure Simple Pairing
Supports Low Power Mode (Sniff/Sniff Sub-rating/Hold/Park)
Enhanced BT/Wi-Fi Coexistence Control to improve transmission quality in different profiles
Bluetooth 4.0 Dual Mode support: Simultaneous LE and BR/EDR
Supports multiple Low Energy states
Bluetooth Transceiver
Fast AGC control to improve receiving dynamic range
Supports AFH to dynamically detect channel quality to improve transmission quality
Integrated internal Class 1, Class 2, and Class 3 PA
Bluetooth 3.0+HS compatible
Supports Power Control/Enhanced Power Control
Bluetooth Low Energy Support
Integrated 32K oscillator for power management
Peripheral Interfaces
Configurable LED pin