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MAX14579EETA

Description
Low-Power Headset Detectors with SEND/END Button Support Low-Power Microphone Mode
File Size987KB,11 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX14579EETA Overview

Low-Power Headset Detectors with SEND/END Button Support Low-Power Microphone Mode

19-5964; Rev 0; 06/11
TION KIT
EVALUA BLE
AVAILA
Low-Power Headset Detectors
with SEND/END Button Support
Features
S
3.5mm Jack Insertion Detection
S
Simple Interface: One Input/Two Open-Drain
Outputs
S
Low-Power Microphone Mode
S
Low-Noise, High-PSRR Microphone Bias
Generator
S
Click-and-Pop Suppression
S
High-ESD Protection on MIC and DETIN Inputs
±15kV Human Body Model (HBM)
General Description
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 micro-
phone 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 micro-
phone. 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 -40NC to +85NC extended
temperature range.
MAX14579E/MAX14579AE
Applications
Cell Phones
e-Readers
Tablet PCs
Ordering Information
PART
MAX14579EETA+
MAX14579AEETA+**
TEMP RANGE
-40NC to +85NC
-40NC to +85NC
PIN-PACKAGE
8 TDFN-EP*
8 TDFN-EP*
+Denotes
a lead(Pb)-free/RoHS compliant package.
*EP
= Exposed pad.
**Future
product—contact factory for availablity.
Typical Operating Circuit
ADC
1µF
3.3V
3.5mm
SOCKET
MODE
V
CC
CAP
0.22µF
3.3V
PROCESSOR
1MΩ
SWD
3.3V
MAX14579E
RES
2.2kΩ
DETIN
DET
EP/GND
MIC
10kΩ
1MΩ
AUDIO
AMPLIFIER
MICROPHONE
AMPLIFIER
0.1µF
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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