INMP441
TABLE 2. I
2
S DIGITAL INPUT/OUTPUT CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
NOTES
DIGITAL INPUT
Input Voltage High (V
IH
)
L/R, WS, SCK
0.7
x V
DD
V
DD
V
1
Input Voltage Low (V
IL
)
L/R, WS, SCK
0
0.25
x V
DD
V
1
SD DIGITAL INPUT
Voltage Output Low (VOL)
VDD = 1.8 V, I
SINK
= 0.25 mA
0.1 ×
V
DD
V
1
Voltage Output Low (VOL)
VDD = 1.8 V, I
SINK
= 0.7 mA
0.3 ×
V
DD
V
1
Voltage Output High (VOH)
VDD = 1.8 V, I
SINK
= 0.7 mA
0.7 ×
V
DD
V
1
Voltage Output High (VOH)
VDD = 1.8 V, I
SINK
= 0.25 mA
0.9 ×
V
DD
V
1
Voltage Output Low (VOL)
VDD = 3.3 V, I
SINK
= 0.5 mA
0.1 ×
V
DD
V
1
Voltage Output Low (VOL)
VDD = 3.3 V,
ISINK
= 1.7 mA
0.3 ×
V
DD
V
1
Voltage Output High (VOH)
VDD = 3.3 V, I
SINK
= 1.7 mA
0.7 ×
V
DD
V
1
Voltage Output High (VOH)
VDD = 3.3 V, I
SINK
= 0.5 mA
0.9 ×
V
DD
V
1
Note 1:
Limits based on characterization results; not production tested.
TABLE 3. SERIAL DATA PORT TIMING SPECIFICATIONS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
NOTES
t
SCH
SCK high
50
ns
t
SCL
SCK low
50
ns
t
SCP
SCK period
312
ns
f
SCK
SCK frequency
0.5
3.2
MHz
t
WSS
WS setup
0
ns
t
WSH
WS hold
20
ns
f
WS
WS frequency
7.8
50
kHz
TIMING DIAGRAM
Figure 1. Serial Data Port Timing
SCK
WS
SD
t
SCP
t
SCH
t
SCL
t
WSH
t
WSS
Page 5 of 21
Document Number: DS-INMP441-00
Revision: 1.1
