MAX14579E Datasheet, PDF (6/11 Pages) Maxim Integrated Products – Low-Power Headset Detectors with SEND/END Button Support Low-Power Microphone Mode

Low-Power Headset Detectors
with SEND/END Button Support
TOP VIEW
MIC DETIN V_CC CAP
8
7
6
5
MAX14579E
MAX14579AE
+
*EP/GND
1
2
3
4
RES MODE SWD DET
TDFN
*CONNECT THE EXPOSED PAD (EP/GND) TO THE GROUND PLANE.
Pin Configuration
Pin Description
PIN
NAME
FUNCTION
1
RES
Resistor Connection. Connect an external 2.2kI resistor from RES to MIC for microphone
biasing.
2
MODE
Microphone Mode Control Input. MODE selects the operating mode. See the MODE Control
Input section for more information.
3
SWD
SEND/END Button Detection Output. SWD asserts when a SEND/END button press event
occurs. SWD is an active-low, open-drain output.
4
DET
Jack Insertion Detection Open-Drain Output. DET is asserted when there is a 3.5mm jack
inserted into the socket. DET is an active-low output.
5
CAP
Internal LDO Output. Connect a 0.22FF ceramic (X5R, X7R, or better) capacitor between CAP
and ground.
6
VCC
Supply Voltage. Bypass VCC to ground with a 1FF ceramic capacitor.
7
DETIN
Jack Insertion Detection Input. An internal comparator monitors DETIN for jack insertion/
removal events.
8
MIC
Microphone Connection. During audio operation, a 2.2V bias voltage is supplied to MIC
through RES. An internal comparator monitors MIC for SEND/END button press events.
—
EP
Exposed Pad. The exposed pad is the ground connection for the device. Connect EP/GND to
the ground plane.
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