SI5345_16 Datasheet, PDF (48/60 Pages) Silicon Laboratories – 10-Channel, Any-Frequency, Any-Output Jitter Attenuator/ Clock Multiplier

Si5345/44/42 Rev D Data Sheet
Pin Descriptions
Pin Name
Si5345
Pin Number
Si5344
Si5342
SCLK
16
14
14
A0/CSb
19
16
16
Control/Status
INTRb
12
33
33
RSTb
6
17
17
OEb
11
12
12
47
—
—
LOLb
—
27
27
LOS0b
—
—
30
LOS1b
—
—
31
LOS2b
—
—
35
LOS3b
—
—
36
LOS_XAXBb
—
28
28
Pin Type¹
Function
Serial Clock Input²
I
This pin functions as the serial clock input for both I²C and SPI
modes. 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. Tie high or low when unused.
Address Select 0/Chip Select²
I
This pin functions as the hardware controlled address A0 in I²C
mode. In SPI mode, this pin functions as the chip select input (ac-
tive low). This pin is internally pulled-up by a ~20 kΩ resistor and
can be left unconnected when not in use.
Interrupt²
O
This pin is asserted low when a change in device status has oc-
curred. It should be left unconnected when not in use.
Device Reset²
Active low input that performs power-on reset (POR) of the de-
I
vice. Resets all internal logic to a known state and forces the de-
vice registers to their default values. Clock outputs are disabled
during reset. This pin is internally pulled-up and can be left un-
connected when not in use.
Output Enable²
I
This pin disables all outputs when held high. This pin is internally
pulled low and can be left unconnected when not in use.
Loss Of Lock (Si5345)²
O
This output pin indicates when the DSPLL is locked (high) or out-
of-lock (low). It can be left unconnected when not in use.
Loss Of Lock (Si5344/42)³
O
This output pin indicates when the DSPLL is locked (high) or out-
of-lock (low). It can be left unconnected when not in use.
Loss Of Signal for IN0³
O
This pin indicate a loss of clock at the IN0 pin when low.
Loss Of Signal for IN1³
O
This pin indicate a loss of clock at the IN1 pin when low.
Loss Of Signal for IN2³
O
This pin indicate a loss of clock at the IN2 pin when low.
Loss Of Signal for IN3³
O
This pin indicate a loss of clock at the IN3 pin when low.
Loss Of Signal on XA/XB Pins³
O
This pin indicates a loss of signal at the XA/XB pins when low.
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