FSA8008AUMX

Audio Special Purpose Overview

The FSA8008AUMX is an audio jack detection and configuration switch from onsemi (formerly Fairchild Semiconductor). It is designed to determine 3- or 4-pole audio jack configurations and integrates a microphone bias switch. The device operates with a supply voltage range of 1.65V to 3.6V, features low on-resistance, and is housed in a compact 10-UMLP (1.8x1.4 mm) surface-mount package. It functions reliably across an operating temperature range of -40°C to +85°C.

Audio Special Purpose Feature Summary

• Detects 3- or 4-pole audio jacks (3.5mm and 2.5mm)
• Integrated MIC switch for 4-pole configuration applications
• Low power consumption with typical supply current of <1 µA
• Compact 10-UMLP package (1.8 x 1.4 x 0.5 mm)
• Low on-resistance (<2.9 Ohms typical)
• Supports impedance and moisture detection

Audio Special Purpose Applications

• Cellular Phones
• Portable Audio Devices
• Mobile Handsets

Audio Special Purpose Procurement Notes

The FSA8008AUMX is listed as Obsolete/End-of-Life by onsemi. Sourcing should be verified through authorized distributors for remaining stock or secondary market sources. Ensure RoHS compliance documentation is available if required for the specific manufacturing process.

Audio Special Purpose Selection Notes

Select this component for designs requiring integrated audio jack detection and microphone bias switching in space-constrained portable applications. The 10-UMLP package is suitable for high-density PCB layouts. Verify that the system supply voltage falls within the 1.65V to 3.6V operational range. Note that while it detects jack presence, it does not provide full audio signal routing for all poles simultaneously without external switches or additional circuitry depending on the specific application topology.