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Product Descriptions

CM108B is a highly integrated single chip USB audio solution. All essential analog modules are embedded in CM108B, including dual DAC and headphone amplifier, ADC, microphone booster, PLL, crystal-less design, regulator, anti-pop circuitry and USB transceiver. Many features are programmable with jumper pins or external EEPROM.
In addition, audio adjustment can be easily controlled via specific HID compliant volume control pins. For value added application, external codec or audio DSP can be connected to CM108B via I2S pin for further processing. 3 GPIO pins can be accessed with customer application software for additional value added application.

Product Features

• Compliant with USB 2.0 Full Speed Operation

• Compliant with USB Audio Device Class Specification v1.0

• Supports USB Suspend / Resume Mode and Remote Wakeup with Volume Control Pins

• Crystal-less Design with On-chip PLL and Embedded USB Transceiver

• Jumper Pin for Speaker Mode (Playback Only) or Headset Mode (Playback + Recording)

• For Headset Mode, USB Audio Function Topology has 2 Input Terminals, 2 Output Terminals, 1 Mixer Unit, 1 Selector Unit, and 3 Feature Units

• Jumper Pin for Mixer Unit Enable / Disable under Headset Mode

• For Speaker Mode, USB Audio Function Topology has 1 Input Terminal, 1 Output Terminal, and 1 Feature Unit

• Support One Control Endpoint, One Isochronous Out Endpoint, One Isochronous In Endpoint, and One Interrupt In Endpoint

• Supports AES/EBU, IEC60958, S/PDIF Consumer Formats for Stereo PCM Data at S/PDIF Output

• Volume Up, Volume Down, and Playback Mute Pins support USB HID device class for Host Control Synchronization

• Record Mute Pin with LED Indicator for Record Mute Status

• External EEPROM Interface for Vendor Specific USB VID, PID, and Volume Settings

• 3 GPIO Pins

• Improved ESD Protection Mechanism

• Built-in Pop Noise Reduction Circuitry

• Jumper Pin to Set the Power Mode (100mA or 500mA, Bus Power or Self Power)

• Isochronous Transfer uses Adaptive Mode with Internal PLL for Synchronization

• 48K / 44.1KHz Sampling Rate for Both Playback and Recording

• Soft Mute Function

• Embedded High Performance 16-Bit Audio DAC with Earphone Phone Amplifier

• Embedded 16-Bit ADC Input with Microphone Boost

• Embedded Power-On-Reset Block

• Embedded 5V to 3.3V Regulator for Single External 5V Operation

• 48 Pin LQFP Package

SOFTWARE OPTIONS

• Cmedia USB Audio Driver

• Xear? Living

• Xear? SingFX

• Xear? Magic Voice

Specifications

Actual product photos

Product Data Book：

For more product information, please download the PDF

Payment&Transportation

Official Certificate&Certificate

Multiple product supply

Company office environment

Warehouse Real Shot

Standard packaging

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