ICS-41351 Digital Multi-Mode Microphone TDK InvenSense ICS-41351 Digital Multi-Mode Microphone features a MEMS microphone element, an impedance converter amplifier, and a fourth-order Σ-Δ modulator. The ICS-41351 operates in low power mode (AlwaysOn), standard mode, and sleep mode. This multi-mode microphone is compatible with Sn/Pb and Pb-free solder processes. The TDK InvenSense ICS-41351 is ideal for use in smartphones, microphone arrays, tablets, cameras, BLUETOOTH® headsets, and security and surveillance.