No USB or Audio Protocol Expertise Required
Ideal for Power-Sensitive, Space-Constrained Applications

Silicon Labs has announced the release of a fixed-function audio bridge device, a convenient turnkey solution for digital audio data transmission between USB and I2S (inter-IC sound) serial bus interfaces.

The CP2615 digital audio bridge simplifies connectivity between USB and I2S. It can be used in applications based on Windows, Linux, and macOS operating systems, such as headphones, headsets, speakers, MP3 accessories, navigation systems, and PoS terminals. In particular, it enables faster time-to-market for USB audio applications that are power-sensitive or space-constrained.

The CP2615 digital audio bridge requires no USB audio or protocol expertise. Supporting drop-in connectivity, developers can focus more on end applications rather than firmware development.



The single-chip CP2615 audio bridge is provided in a compact 5mm x 5mm QFN 32 package, making it ideal for portable audio applications with limited PCB space. The feature-rich CP2615 device includes a USB 2.0 full-speed controller, USB transceiver, on-chip oscillator, I2S audio interface, I2C control interface, and embedded flash memory for storing device configuration. Due to its high level of integration, no external components are required, resulting in reduced PCB size and lower BOM costs.

The CP2615 audio bridge provides a cost-effective solution particularly for the mid-to-low-end headphone market requiring a sampling rate of 48kHz. This small form factor device can also be usefully employed in USB dongles for consumers with high-end analog audio jack-based headphones.

Tom Pannell, Senior Marketing Director for IoT Products at Silicon Labs, stated, "It is no exaggeration to say Silicon Labs has expertise in all aspects of USB development. Moreover, along with plug-and-play USB connectivity solutions like the CP2615 audio bridge chip, we are providing developers with Silicon Labs' long-accumulated proprietary USB expertise. By using Silicon Labs' CP2615 device, Xpress Configurator tool, and evaluation kit for developing USB-based digital audio applications, developers will be able to significantly reduce time and development costs."