FSA8039AUMSX

Audio Special Purpose Overview

The FSA8039AUMSX is an audio jack detection and configuration switch designed for 3-pole and 4-pole accessories. It features moisture sensing to prevent false accessory detection in the audio jack. The device operates within a supply voltage range of 2.5V to 4.5V and supports I2C logic interfaces. It is qualified for an operating temperature range of -40°C to +85°C (TA). The component is housed in a compact 10-UMLP (1.8x1.4mm) surface-mount package.

Audio Special Purpose Feature Summary

• Audio jack detection switch for 3-pole and 4-pole accessories
• Moisture sensing capability prevents false positive detections
• Supply voltage range: 2.5V to 4.5V
• Operating temperature range: -40°C to +85°C
• Compact 10-UMLP (1.8x1.4mm) package

Audio Special Purpose Applications

• Mobile phones
• Portable media players
• Tablets
• Other portable electronic devices with audio jacks

Audio Special Purpose Procurement Notes

Note that Fairchild Semiconductor has been acquired by onsemi. This part is now manufactured and distributed under the onsemi brand (e.g., FSA8039AUMSX-ON). Verify availability and lead times through onsemi or authorized distributors.

Audio Special Purpose Selection Notes

Select this component for designs requiring reliable audio jack insertion/removal detection with moisture protection. Ensure the system voltage remains within the 2.5V to 4.5V range. Verify that the 10-UMLP footprint fits the mechanical constraints of the target application.