PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Figure 3. Pin Configuration
TABLE 6. PIN FUNCTION DESCRIPTIONS
PIN NAME FUNCTION
Serial-Data Clock for I²S Interface
2 SD
Serial-Data Output for I²S Interface. This pin tri-states when not actively driving the
appropriate output channel. The SD trace should have a 100 kΩ pulldown resistor to
discharge the line during the time that all microphones on the bus have tri-stated their
outputs.
3 WS Serial Data-Word Select for I²S Interface
4 L/R
Left/Right Channel Select. When set low, the microphone outputs its signal in the left channel
of the I²S frame. When set high, the microphone outputs its signal in the right channel.
5 GND Ground. Connect to ground on the PCB.
6 GND Ground. Connect to ground on the PCB.
7
VDD
Power, 1.8 V to 3.3 V. This pin should be decoupled to Pin 6 with a 0.1 μF capacitor.
8 CHIPEN
Microphone Enable. When set low (ground), the microphone is disabled and put in power-
down mode. When set high (VDD), the microphone is enabled.
9 GND Ground. Connect to ground on the PCB.
4L/R
6
GND
5GND
3W
S
7 VDD
2SD 8 CHIPEN
1SCK 9 GND
B
OT
TOM VIEW
(Not
to S
cale)
Page 8 of 21
Document Number: DS-INMP441-00
Revision: 1.1
