MAX14579AE

Low-Power Headset Detectors with SEND/END Button Support

Complete Audio Headset Jack Detection Solution

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Overview

3.5mm Jack Insertion Detection
Simple Interface: One Input/Two Open-Drain Outputs
Low-Power Microphone Mode
Low-Noise, High-PSRR Microphone Bias Generator
Click-and-Pop Suppression
High-ESD Protection on MIC and DETIN Inputs
- ±15kV Human Body Model (HBM)

The MAX14579E/MAX14579AE provide a simple solution for detecting the insertion and managing the operation of a 3.5mm stereo headset with a microphone. These devices integrate all circuitry required to detect SEND/END button press events and generate required microphone bias voltages.

The devices are managed with only three GPIOs from the host controller to select between call mode and standby mode, and monitor the SEND/END and jack insertion status. In call mode, the low-noise LDO is enabled to provide DC bias to the externally preamplified microphone. In standby mode, microphone low-power pulsing is enabled to reduce supply current while waiting for a SEND/END button press event. Two open-drain outputs signal the host controller when an insertion/removal or SEND/END button press event occurs.

The MAX14579E/MAX14579AE manage jack insertion detection by monitoring a 3.5mm socket with a normally open jack insertion switch.

The devices are available in an 8-pin TDFN package, and are fully specified over the -40°C to +85°C extended temperature range.

Applications

Cell Phones
e-Readers
Tablet PCs

Documentation

Data Sheet 1

MAX14579AE-MAX14579E: Low-Power Headset Detectors with SEND/END Button Support Data Sheet (Rev.0) 07/18/2011

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX14579E and MAX14579AE

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Features and Benefits

USB Powered or External Power Supplies
Low-Power Microphone Mode
Low-Noise Microphone Bias Generator
Configurable for Headsets with Normally Open Detection Switches
Headset SEND/END Detection
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX14579E evaluation kit (EV kit) provides a proven design to evaluate the MAX14579E headset detection IC. The EV kit is designed to demonstrate the IC's headset insertion detection, SEND/END detection, and microphone low-power features. The EV kit requires a single power source using an active USB port.

The EV kit PCB comes with a MAX14579EETA in an 8-pin TDFN package with an exposed pad installed and can also be used to evaluate the MAX14579AE.