SI5345_16 Datasheet, PDF (47/60 Pages) Silicon Laboratories – 10-Channel, Any-Frequency, Any-Output Jitter Attenuator/ Clock Multiplier

Si5345/44/42 Rev D Data Sheet
Pin Descriptions
Table 9.2. Si5345/44/42 Pin Descriptions
Pin Name
Si5345
Outputs
OUT0
24
OUT0b
23
OUT1
28
OUT1b
27
OUT2
31
OUT2b
30
OUT3
35
OUT3b
34
OUT4
38
OUT4b
37
OUT5
42
OUT5b
41
OUT6
45
OUT6b
44
OUT7
51
OUT7b
50
OUT8
54
OUT8b
53
OUT9
59
OUT9b
58
Serial Interface
Pin Number
Si5344
20
19
25
24
31
30
36
35
—
—
—
—
—
—
—
—
—
—
—
—
Si5342
20
19
25
24
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
I2C_SEL
39
38
38
SDA/SDIO
18
13
13
A1/SDO
17
15
15
Pin Type¹
Function
O
O
O
O
O
O
O
O
O
Output Clocks. These output clocks support a programmable
O
signal swing and common mode voltage. Desired output signal
format is configurable using register control. Termination recom-
O
mendations are provided in 3.9.3 Differential Output Terminations
and 3.9.4 LVCMOS Output Terminations. Unused outputs should
O
be left unconnected.
O
O
O
O
O
O
O
O
I²C Select². This pin selects the serial interface mode as I²C
I
(I2C_SEL = 1) or SPI (I2C_SEL = 0). This pin is internally pulled
up by a ~ 20 kΩ resistor to the voltage selected by the
IO_VDD_SEL register bit.
Serial Data Interface²
This is the bidirectional data pin (SDA) for the I²C mode, or the
I/O
bidirectional data pin (SDIO) in the 3-wire SPI mode, or the input
data pin (SDI) in 4-wire SPI mode. When in I²C mode, this pin
must be pulled-up using an external resistor of at least 1 kΩ. No
pull-up resistor is needed when is SPI mode. Tie low when un-
used.
Address Select 1/Serial Data Output²
In I²C mode, this pin functions as the A1 address input pin and
I/O
does not have an internal pull-up or pull-down resistor. In 4-wire
SPI mode this is the serial data output (SDO) pin and drives high
to the voltage selected by the IO_VDD_SEL bit. Leave discon-
nected when unused.
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