CSR8635

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Single Chip Bluetooth Audio ROM Platform

The CSR8635 QFN single-chip Bluetooth audio ROM device targets mid-range stereo speakers and headsets.

CSR8635 and Qualcomm Kalimba are products of Qualcomm Technologies, Inc., and/or its subsidiaries.

Product license agreement

Specifications

DSP

DSP Technology: Qualcomm® Kalimba™ DSP

MCU

MCU Clock Speed: 80 MHz

Bluetooth

Bluetooth Specification Version: Bluetooth 4.1

Standard Profiles: Bluetooth Hands-Free Profile (HFP) 1.6, Bluetooth Audio/Video Remote Control Profile (AVRCP) 1.4, Bluetooth Advanced Audio Distribution Profile (A2DP) 1.2, Bluetooth Device ID Profile (DIP) 1.3, Bluetooth Headset Profile (HSP) 1.2

Links: Dual eSCO, Dual A2DP

Receiver Sensitivity (basic rate, typical): -91 dBm

Maximum Output Power (typical): Up to 8 dBm

USB

USB Version: USB 2.0 (Full Speed)

USB Support: Supports USB charger detection

Audio

Other Audio Capturing Technologies: Talk-Time Extension

Other Audio Processing: 5-band EQ

Qualcomm® cVc™ Echo Cancellation and Noise Suppression (ECNS) technology: Qualcomm® cVc™ Echo Cancellation and Noise Suppression

Charging

Maximum Current: 200 mA on chip, 500 mA with external transistor

Memory

RAM: 56 KB RAM

Interfaces

Supported Interfaces: I²S, I²C, PCM, SPI, UART

Input/Output

Analog-To-Digital Converter (ADC): 1 ADC

Digital-To-Analog Converter (DAC): 1 DAC

Maximum PIOs: 22

Pulse-Width Modulation (PWM) (LED): 3x

Package

Package Type: QFN

Pitch: 0.4mm Pitch

Size: 8 x 8 x 0.9 mm

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Receiver Sensitivity (basic rate, typical)	MCU Clock Speed	Other Audio Capturing Technologies	Microphone	Package Type	Size
-91 dBm	80 MHz	Talk-Time Extension	—	QFN	8 x 8 x 0.9 mm
-92 dBm	80 MHz	HD Voice Talk-Time Extension	2 analog mics 1 microphone bias generator 2 digital mics	VFBGA	5.5 x 5.5 x 1 mm
-92 dBm	80 MHz	HD Voice Talk-Time Extension	2 analog mics 1 microphone bias generator 2 digital mics	VFBGA	5.5 x 5.5 x 1 mm
-91 dBm	80 MHz	Talk-Time Extension	—	QFN	8 x 8 x 0.9 mm
-92 dBm	80 MHz	HD Voice Talk-Time Extension	2 analog mics 1 microphone bias generator 2 digital mics	VFBGA	5.5 x 5.5 x 1 mm
-91 dBm	80 MHz	Talk-Time Extension	1 analog mic 1 digital mic	QFN	8 x 8 x 0.9 mm
-92 dBm	80 MHz	Talk-Time Extension	1 analog mic 1 microphone bias generator 1 digital mic	VFBGA WLCSP	3.92 x 3.68 x 0.6 mm ¹ 5.5 x 5.5 x 1 mm ²
-91 dBm	80 MHz	Talk-Time Extension	—	—	8 x 8 x 0.9 mm

WLCSP
VFBGA

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