A Single Data Line Using Time Division Multiplexing (TDM) for Digital Audio Systems White Paper

The “A Single Data Line Using Time Division Multiplexing (TDM) for Digital Audio Systems” white paper explains how Time Division Multiplexing can be used to efficiently transmit multi‑channel digital audio over a single data line. Building on the standard I²S interface, the paper describes how TDM enables scalable, high‑channel‑count audio systems while reducing pin count, routing complexity, and integration challenges in modern SoC‑based audio subsystems.

What You Will Learn:

• How Time Division Multiplexing extends the I²S interface to support multi‑channel audio over a single serial data line
• How TDM frame structure, slot timing, and word synchronization enable deterministic multi‑channel audio transfer
• How serial clock frequency scales with sampling rate, channel count, and channel width in TDM audio systems