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 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.

• 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)
• 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
• 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

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

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

RF

• 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)
• 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

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

• Mono headset
• Stereo headset
• Real Wireless Stereo (RWS) headset
• Mono speaker
• Stereo speaker