INMP441

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

Figure 3. Pin Configuration

TABLE 6. PIN FUNCTION DESCRIPTIONS

PIN

NAME

FUNCTION

1

SCK

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.

4

L/R

6 GND

3

WS

7 VDD

2

SD

8 CHIPEN

1

SCK

9 GND

BOTTOM VIEW

(Not to Scale)

Page 8 of 21

Document Number: DS-INMP441-00

Revision: 1.1