CM119B Overview
The CM119B is a highly integrated, crystal-free USB audio single chip solution optimized for USB headset, headphone, and dongle applications such as VoIP (Voice over Internet Protocol). All essential analog modules were embedded in the CM119B including dual DAC and earphone driver, ADC, microphone booster, PLL, regulator, and USB transceiver. It also supports 8GPIO pins.
CM119B Key Features
- pliant with USB 2.0 Full Speed Operation
- pliant with USB Audio Device Class Specification v1.0
- Supports USB Suspend/Resume Mode and Remote Wakeup with Volume Control pins
- On-chip oscillator that provides reference sources for PLL and embedded USB transceiver
- Jumper pin for Headset Mode (Playback + Recording) and Speaker/Headphone Mode (Playback Only)
- Jumper pin for Mixer Unit enable/disable under Headset Mode and Power Mode setting
- I2C interface to access internal registers for external MCU and USB host
- USB audio function topology has 2 Input Terminals, 2 Output Terminals, 1 Mixer Unit, 1 Selector Unit, and 3 Feature Unit
- USB audio function topology has 1 Input Terminal, 1 Output Terminal, and 1 Feature Unit (Speaker Mode)
- Anti-pop noise design for plugged and vice-versa
CM119B Applications
- pliant with USB 2.0 Full Speed Operation
- pliant with USB Audio Device Class Specification v1.0
- Supports USB Suspend/Resume Mode and Remote Wakeup with Volume Control pins
- On-chip oscillator that provides reference sources for PLL and embedded USB transceiver
- Jumper pin for Headset Mode (Playback + Recording) and Speaker/Headphone Mode (Playback Only)