MAX14627ETA+T

Audio Special Purpose Overview

The MAX14627ETA+T is a low-power headset detector IC designed for managing 3.5mm stereo headsets with microphones. It integrates circuitry for jack insertion detection and SEND/END button press monitoring, requiring only three GPIOs from the host controller. The device features an internal low-noise LDO providing a 2.2V bias voltage for externally preamplified microphones. It operates from a 2.5V to 5.5V supply voltage and supports microphone low-power pulsing to reduce current consumption in standby mode. The component is specified over an operating temperature range of -40°C to +85°C.

Audio Special Purpose Feature Summary

• Integrated low-noise LDO regulator generating a fixed 2.2V output for microphone biasing
• Supports SEND/END button detection via MIC input with configurable debounce timing
• Features microphone low-power mode (MPLP) utilizing short pulses to minimize supply current
• Includes ±15kV HBM ESD protection on DETIN and MIC terminals

Audio Special Purpose Applications

• Cell phones
• Portable media players
• Tablet/laptop PCs

Audio Special Purpose Procurement Notes

Verify the package marking and lot traceability against the manufacturer's shipping documentation upon receipt. Confirm that the received components match the 8-TDFN-EP (2x2) physical dimensions and pin configuration specified in the datasheet before integration into the assembly process.

Audio Special Purpose Selection Notes

Select the MAX14627 when a 2.2V microphone bias voltage is required and the system supply voltage ranges from 2.5V to 5.5V. This part is suitable for designs needing integrated jack detection and SEND/END button support without external discrete bias components. Ensure the host processor can manage the MODE input states to control the transition between call mode and low-power standby.

Audio Special Purpose Part Context

This component belongs to the MAX14627/MAX14628 family of headset detectors manufactured by Analog Devices Inc./Maxim Integrated. The MAX14627 variant specifically provides a 2.2V LDO output, whereas the MAX14628 offers a 2.8V LDO and additional open microphone detection capabilities. Both share the same TDFN package and core detection functionality.

Audio Special Purpose Replacement Considerations

The MAX14628ETA+T is a related device within the same family but provides a 2.8V LDO output instead of 2.2V and includes open microphone detection. Verify that the target microphone bias requirements and specific detection logic are compatible with the alternative part number before substitution.