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S i 5 3 4 1 / 4 0
38
Preliminary Rev. 0.9
Power
VDD
32
21
P
Core Supply Voltage
The device core operates from a 1.8V supply. See the Si5341/40
Family Reference Manual for power supply filtering recommenda-
tions.
46
32
60
39
—
40
VDDA
13
8
P
Core Supply Voltage 3.3V
This core supply pin requires a 3.3V power source.
See the Si5341/40 Family Reference Manual for power supply fil-
tering recommendations.
—
9
P
VDDS
—
26
P
Status Output Voltage
The voltage on this pin determines the V
OL
/V
OH
on LOL and
LOS_XAXB status output pins.
See the Si5341/40 Family Reference Manual for power supply fil-
tering recommendations.
VDDO0
22
18
P
Output Clock Supply Voltage 0–9
Supply voltage (3.3 V, 2.5 V. 1.8 V) for OUTn, OUTn outputs.
See the Si5341/40 Family Reference Manual for power supply fil-
tering recommendations.
Leave VDDO pins of unused output drivers unconnected. An
alternate option is to connect the VDDO pin to a power supply and
disable the output driver to minimize current consumption.
VDDO1
26
23
P
VDDO2
29
29
P
VDDO3
33
34
P
VDDO4
36
—
P
VDDO5
40
—
P
VDDO6
43
—
P
VDDO7
49
—
P
VDDO8
52
—
P
VDDO9
57
—
P
GND PAD
P
Ground Pad
This pad provides electrical and thermal connection to ground and
must be connected for proper operation.
Table 17. Si5341/40 Pin Descriptions (Continued)
Pin Name
Pin Number
Pin Type
1
Function
Notes:
1.
I = Input, O = Output, P = Power.
2.
The IO_VDD_SEL control bit (0x0943 bit 0) selects 3.3 V or 1.8 V operation.
3.
The voltage on the VDDS pin(s) determines 3.3 V or 1.8 V operation.