Products > Integrated Circuits (ICs) > Audio ICs > MAX14628ETA+
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Audio Detection Switch 1 Channel 8-TDFN-EP (2x2)

Manufacturer :
Maxim Integrated
Package/Case :
Product Categories :
Audio Special Purpose
RoHs Status:
Lead free / RoHS Compliant
Marking Code:

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MAX14628ETA+ Product Details

The MAX14627/MAX14628ETA+ 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 needed to detect SEND/END button press events and generate required microphone bias voltages, and are fully compatible with Windows Mobile 7. The devices need 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. If a 3P headset without a microphone is inserted, the low-power pulsing can be disabled by setting the MODE input to high impedance. The MAX14627 operates from a 2.5V to 5.5V input voltage supply and features an internal 2.2V LDO output, while the MAX14628ETA+ operates from a 3.1V to 5.5V voltage supply and features an internal 2.8V LDO output voltage. Both devices control jack insertion detection by monitoring a 3.5mm socket with a normally open jack insertion switch. Additionally, the MAX14628ETA+ features open microphone detection. The MAX14627/MAX14628ETA+ are available in an 8-pin TDFN package, and are fully specified over the -40°C to +85°C extended temperature range.


  • Versatile Jack Detection and Control
    • MODE Three-State Microphone Bias Control
    • MIC Switch Ground Detection (MAX14627)
    • MIC Switch Open and Ground Detection (MAX14628)
  • Compatible with Windows Mobile 7 and Google Android
    • Microphone Button Press Detection
  • High-Performance MIC Bias and Power Savings
    • No Pop-Up Noises
    • Ultra-Low Noise, High-PSRR MIC Bias
    • Low-Power MIC Idle Mode
    • Automatic Ultra-Low-Power Mode When Microphone Is Disabled
  • PCB Space and Cost Savings
    • Integrated ±15kV ESD Protection (HBM) on DETIN and MIC Input Terminals
    • Small 8-Pin (2mm x 2mm) TDFN Package


  • Cell Phones
  • Portable Media Players
  • Tablet/Laptop PCs

MAX14628ETA+ Block Diagram
(Picture: Diagram)

Technical Parameters

Function Detection Switch Operating Temperature -40??C ~ 85??C (TA)
Applications Consumer Audio Package / Case 8-WFDFN Exposed Pad
Number of Channels 1 Supplier Device Package 8-TDFN-EP (2x2)
Voltage Supply 3.1V ~ 5.5V

MAX14628ETA+ Documents

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Maxim Integrated Products is a global range of linearity, mixed-signal integrated circuits (IC) design, R & D and manufacturing leader, has designed, developed, and manufactured analog, mixed-signal,...
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