Press Release, 17 October 2025
The MIPI Alliance has released SoundWire I3S (SWI3S v1.0), a new audio interface standard designed to unify control and data over a single, power-efficient, scalable connection. Built for modern consumer electronics, automotive, and industrial devices, SWI3S addresses challenges of dense, feature-rich designs where space, EMI, and power are critical constraints. Unlike legacy interfaces like I2S or TDM, SWI3S supports higher bandwidth, multiple device topologies, and robust noise immunity.
The interface delivers up to 76 Mbps over a two-pin connection, with modes like forwarded clock and differential signaling to minimize interference. Each SWI3S system can include multiple links, each supporting a manager and up to 12 peripherals such as microphones and amplifiers. Features like in-band command transport, bus management, and a precise audio clock help ensure high-quality, synchronized audio across devices.
Hezi Saar, MIPI Alliance Chair, described SWI3S as a “game changer for embedded audio systems,” highlighting its flexible architecture that enables performance optimization while simplifying integration and future-proofing designs. To help implementers, MIPI also released a SWI3S visualizer tool to model DataPort behavior and test bandwidth allocation.
The Alliance is hosting a three-part webinar series from October 21–23, offering insights into SWI3S and other audio specifications, including future developments and software tools. A technical brief on SWI3S is also available for download, providing engineers and developers with detailed guidance on adopting the new standard.
MIPI Alliance, founded in 2003, comprises over 375 global members from semiconductor, OEM, software, and mobile ecosystems, delivering standards that power connectivity in mobile, automotive, and industrial devices.
