Low Cost USB Audio Controller PC Internet Phone

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CM119B/CM119BN is a highly integrated single chip USB audio solution. CM119B is in 48LQFP package and CM119BN is in 48 QFN package. All essential analog modules are embedded in the chip, including dual DAC and headphone amplifier, mono ADC, microphone booster, PLL, crystal-less design, regulator, anti-pop circuitry and USB transceiver. Many features are programmable with jumper pins or external EEPROM such as speaker only mode and headset mode. In addition, audio adjustment can be easily controlled via specific HID compliant volume control pins.

Symmetry Electronics (and its e-commerce division: SemiconductorStore.com) is an authorized Cmedia distributor.


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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
Single 12MHz Crystal input 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 Operation System 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 Isochroous out Endpoint, one Isochroous in Endpoint, and one Interrupt in Endpoint
Alternate zero bandwidth setting for releasing playback bandwidth on USB Bus when this device is inactive
Volume up, volume down, and playback mute support USB HID for Host Control Synchronization
Record Mute Pin with LED Indicator for Record Mute Status
External EEPROM Interface for Vendor Specific USB VID, PID, Product String, Manufacture String, and Serial Number
Supports AES/EBU, IEC60958, S/PDIF Consumer Formats for Stereo PCM Data at S/PDIF Output
8 GPIO Pins with Read/Write via HID
Embedded Buzzer Function controlled by Register
Support I2C Interface for External MCU Integrated
Jumper Pin for Power Mode Setting
Isochroous 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 Buffer
Host side data loss noise reduction function
Embedded 16 bit ADC input with Microphone Boost
Embedded power on Reset Block
Embedded 5V to 3.3V regulator for single External 5V Operation
Compatible with Win98 SE / Win ME / Win 2000 / Win XP / Win Vista / Win 7 and Mac OS X without Additional Driver
48 Pin LQFP Package
Support Hardware SDK tool for third-party software or soft-phone development


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Cmedia Datasheet

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