SI5341_16 Datasheet, PDF (41/53 Pages) Silicon Laboratories – Low-Jitter, 10 or 4-Output, Any-Frequency, Any-Output Clock Generator

Pin Name
Outputs
OUT0
OUT0b
OUT1
OUT1b
OUT2
OUT2b
OUT3
OUT3b
OUT4
OUT4b
OUT5
OUT5b
OUT6
OUT6b
OUT7
OUT7b
OUT8
OUT8b
OUT9
OUT9b
Serial Interface
I2C_SEL
Pin Number
Si5341
Si5340
24
20
23
19
28
25
27
24
31
31
30
30
35
36
34
35
38
—
37
—
42
—
41
—
45
—
44
—
51
—
50
—
54
—
53
—
59
—
58
—
39
38
SDA/SDIO
18
13
A1/SDO
17
15
SCLK
16
14
Pin Type¹
Si5341/40 Rev D Data Sheet
Pin Descriptions
Function
O
Output Clocks. These output clocks support a programmable
signal amplitude when configured as a differential output. Desired
O
output signal format is configurable using register control. Termi-
O
nation recommendations are provided in 3.5.2 Differential Output
Terminations and 3.5.4 LVCMOS Output Terminations. Unused
O
outputs should be left unconnected.
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
I²C Select.² This pin selects the serial interface mode as I²C
(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.
I/O
Serial Data Interface.² This is the bidirectional data pin (SDA) for
the I²C mode, or the 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 in SPI mode.
I/O
Address Select 1/Serial Data Output.² In I²C mode, this pin
functions as the A1 address input pin and does not have an inter-
nal pull up or pull down resistor. In 4-wire SPI mode this is the se-
rial data output (SDO) pin (SDO) pin and drives high to the volt-
age selected by the IO_VDD_SEL pin.
I
Serial Clock Input.² This pin functions as the serial clock input
for both I²C and SPI modes.This pin is internally pulled up by a
~20 kΩ resistor to the voltage selected by the IO_VDD_SEL regis-
ter bit. In I²C mode this pin should have an external pull up of at
least 1 kΩ. No pull-up resistor is needed when in SPI mode.
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Rev. 1.0 | 40