Bluetooth rtl8761b

rtl8761b Mini USB Bluetooth Adapters BT 5.0 Wireless

Feature rtl8761b

Mini USB Bluetooth 5.0 rtl8761b adapter with high speed up to 3Mbps.
Bluetooth low energy Wireless USB Dongle.
Dual-mode Bluetooth transfer.
Low-power selectable 1.2 to 3.6 VI/O.


Supporting Bluetooth voice data.
Supporting multiple languages.
Compatible with Bluetooth v1.2/2.0/2.1/3.0/4.0/5.0
Item Name: Bluetooth Adapter

​Chip: Realtek 8761
Interface: USB 2.0
Transfer rate: 3Mbps
Bluetooth Version: Bluetooth V5.0+EDR
Frequency Band: 2.400-2.480GHz

Color: Black
Item Size: 21x16x5 mm
Receiving Range: About 30M, In an open environment UP TO 50M
Operation System: Windows7/ 8/ 10/ / 2000/ 98/ Me etc.

RTL8761B bluetooth 5.0 Overview

The RT8763B series are single-chip Bluetooth ROM audio solutions for mono (RTL8763BM) and stereo (RTL8763BF/BFR, RTL8763BS, RTL8763BA) applications. The RT8763B is composed of an ARM core and an ultra-low power DSP core with high efficiency computing power, high performance audio codec, power management unit, ADC, ultra-low current RF transceiver, and smart I/O distribution controller.

The rtl8761b parameter configuration tools, the EVB kits, and the MP kits, including controller hardware and software, provide a simple and flexible procedure for customers to quickly design and proceed to mass production with Realtek’s new generation of audio solutions. These complete total solutions provide a fast and highly reliable development path with a very competitive R-BOM.

Network rtl8761b
Network rtl8761b

Bluetooth 5 specification compatible
Supports HFP 1.7, HSP 1.2, A2DP 1.3, AVRCP 1.6, SPP 1.2 and PBAP 1.0
Single-end RF radio output with high performance 10dBm of transmitter power and -94dBm 2M EDR receiver sensitivity
Supports Bluetooth classic (BDR/EDR)

Supports Bluetooth Low Energy (BLE)
Generic access service
Device information service
Proprietary services for data communication
Apple Notification Center Service (ANCS)

Real Wireless Stereo (RWS) rtl8761b
Supports USB type-C audio
Supports iAP2
Realtek’s latest RCV (Real Clear Voice) technology for narrowband and wideband voice connection, including wind noise reduction
Supports high resolution audio codec up to 24bits, 192kHz audio data format

Supports dual analog and digital MIC, AUX-IN, I2S digital audio, analog output
Supports high speed UART, I2C, SPI and USB2.0 compatible interface
Supports high resolution 12-bits multi-channel ADC
Supports PWM I/O and smart LED controller
Supports USB BC1.2 battery charging

Smart I/O distribution scheme with MUX
Built-in 8Mbits FLASH memory (RTL8763BF/RTL8763BFR)
Integrated dual switch mode power regulator, linear regulators, and battery charger; charging current up to 400mA
Built-in battery voltage monitoring and thermal protection scheme with external thermal resistor

Feature rtl8761b
Feature rtl8761b

SBC, AAC decoder support
Package: 5x5mm2 QFN40 (RTL8763BM, RTL8763BF, RTL8763BFR), 6x6mm2 QFN48 (RTL8763BS) and 8x8mm2 QFN68 (RTL8763BA) with 0.4mm pitch
Supports OTA and USB firmware upgrade

GSM 217Hz interference block out design
Low BOM cost
Green (RoHS compliant and no antimony or halogenated flame retardants)
Supports PTA (Packet Traffic Arbiter) when co-existing with Wi-Fi

Baseband Features:
40MHz main clock
Supports serial flash for FW storage and parameter upgrade
Adaptive Frequency Hopping (AFH)
Multi-link support
Supports Serial Copy Management System (SCMS-T) content protection

RAM and ROM Size:
ROM size 768KB
MCU RAM size 16KB x 8 Data RAM + 8KB X 2 cache RAM
DSP RAM 8KB x 22

Supports TX +10dBm (typ.) maximum output power for Bluetooth classic
Supports TX +10dBm (typ.) maximum output power for Bluetooth BLE
Supports TX +4dBm (typ.) maximum output power for Bluetooth BLE low power TPM mode
Receive sensitivity: -94dBm (2Mbps EDR)

Connect rtl8761b
Connect rtl8761b

Receive sensitivity: -97dBm (BLE)
Receiver sensitivity: -106.5dBm (125K BLE long range)
Single-end TX/RX RF port without matching component required (when TX power is below +4dBm and using PIFA type PCB antenna)
Crystal oscillator with built-in integrated capacitor for clock offset digital tuning (0~20pF), could save 2-compensation CL cap following Realtek design guidelines

32-bit ARM Cortex-M4F Processor
Supports hardware Floating Point Unit (FPU)
Supports Memory Protect Unit (MPU)
Supports SWD debug interface
Executed external SPI flash
4-way association cache controller

DSP Audio Processing:
Enhanced Tensilica Hi-Fi-mini compatible 24-bit DSP core
2 single-cycle MACs: 24 x 24-bit multiplier and 56-bit accumulator
Supports G.711 A-Law, µ-Law, continuous-variable-slope-delta (CVSD) and mSBC voice codecs

Supports 8/16 kHz 1/2-mic noise suppression and echo cancellation
Packet Loss Concealment (PLC) for voice processing
SBC, and AAC-LC audio codecs supported for BT audio streaming

Audio Codec:
Dual operation voltage range 2.8V and 1.8V
Supports cap-less, single-ended, and differential mode at the DAC path
Supports 16ohm and 32ohm speaker loading

Stereo 24-bit digital-to-analog (DAC) with 102dBA SNR
Stereo 24-bit analog-to-digital (ADC) with 97dBA SNR
5-band configurable EQ at both DAC/ADC paths
Sampling rates of 8, 16, 32, 44.1, 48, 88.2, and 96kHz are supported.
Built-in MIC bias generator

Digital Audio Interface:
Supports two PDM digital MIC inputs
Supports 24-bit, 192kHz on I2S digital audio
Sampling frequency 8/16/32/44.1/48/88.2/96/176.4/192kHz

Compatible with Bluetooth Core Specification including BR/EDR/LE-1M/LE-2M/LE-Coded (Long Range)
Fully integrated balun and synthesizer minimizes external components.
RF circuit design minimizes power-consumption while keeping excellent performance

Highly integrated PMU design for the system application
Dual switching mode regulator for digital core, radio and audio codec respectively
Built-in LDO for the I/O and FLASH memory

Built-in Li-Ion battery charger with up to 400mA charger current capability
Supports ambient thermal detection to detect the battery temperature
Built-in OVP, OCP, UVP protection to protect the system.

Operating Condition:
Operating voltage: 2.8V to 4.35V (VBAT)
Temperature range: -20°C to +70°C

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