SI5344H-42H Datasheet, PDF (48/56 Pages) Silicon Laboratories – HIGH-FREQUENCY,

Si5344H/42H
Table 19. Pin Descriptions Table
Pin Name
Si5342H Si5344H
Pin
Pin _{Pin Type}¹
Number Number
Function
Power
VDD
21
21
32
32
39
39
P
Core Supply Voltage
P
The device operates from a 1.8 V supply. A 0.1 µF bypass
capacitor should be placed very close to this pin.
P
40
40
P
VDDA
8
8
9
9
VDDS
26
26
29
—
34
—
VDDO0
18
18
VDDO1
23
23
VDDO2
—
29
VDDO3
—
34
GND PAD
—
P
Core Supply Voltage 3.3 V
This core supply pin requires a 3.3 V power source. A
P
1 µF bypass capacitor should be placed very close to this
pin.
P
Status Output Voltage
P
The voltage on these pins determines the V_OL/V_OH on
some of the LOL and LOS status output pins. Connect to
P
3.3 V or 1.8 V. A 0.1 uF bypass capacitor should be
placed very close to this pin.
P
Output Clock Supply Voltage
P
Supply voltage (3.3 V, 2.5 V, 1.8 V) for OUTn, OUTn out-
puts. For unused outputs, leave VDDO pins unconnected.
P
An alternative option is to connect the VDDO pin to a
power supply and disable the output driver to minimize
P
current consumption.
P
Ground Pad
This pad provides connection to ground and must be con-
nected for proper operation.
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. These pins are push-pull outputs and do
not require an external pull-up resistor.
48
Rev. 1.0