FSA8029UMX

Audio Special Purpose Overview

The FSA8029 is an audio jack microphone/video switch designed for 3- or 4-pole accessories with Send/End (S/E) detection. Manufactured by onsemi (formerly Fairchild Semiconductor), it supports both 3.5mm and 2.5mm audio jacks. The device integrates detection switching functionality within a compact 10-UMLP package measuring 1.8x1.4 mm. It operates on a single supply voltage ranging from 2.5V to 4.3V and supports logic interfaces. The device is rated for an ambient temperature range of -40°C to +85°C.

Audio Special Purpose Feature Summary

• Audio jack microphone/video switch for 3- or 4-pole accessories
• Send/End (S/E) detection capability
• Supports 3.5mm and 2.5mm audio jacks
• Compact 10-UMLP (1.8x1.4 mm) surface mount package
• Wide operating supply voltage: 2.5V to 4.3V
• Extended temperature range: -40°C to +85°C

Audio Special Purpose Applications

• Mobile phones
• Smartphones
• MP3 players
• PMP (Portable Media Players)

Audio Special Purpose Procurement Notes

Note that Fairchild Semiconductor has been acquired by onsemi. Verify the specific manufacturer revision level and RoHS compliance status through official datasheets or authorized distributors before procurement. Confirm that the 10-UMLP footprint matches the target PCB layout requirements. Ensure the supply voltage range aligns with the system design constraints.

Audio Special Purpose Selection Notes

Select this component when a dedicated solution for audio jack send/end detection is required in space-constrained designs. The low-profile UMLP package is suitable for portable devices. Verify compatibility with the host system's logic levels and ensure the operating temperature range meets the application's environmental specifications.