Output Frequency Select Pins
There are five integer dividers, one corresponding to each of the five output banks. Using ClockBuilder Pro, a universal hardware input
pin can be assigned for each integer divider, providing capability to select between two different pre-programmed divide values. Divider
values of every integer from 8 to 255 are available in ClockBuilder Pro for each integer divider.
Table 3.4. F
S_INT
Pin Selection Table
F
S_INTx
Output Frequency from INTx
0
Frequency A, as defined in ClockBuilder Pro
1
Frequency B, as defined in ClockBuilder Pro
Output Enable
A universal hardware input pin can be defined to control output enable of a differential output, a bank of differential outputs, or as a
global output enable pin controlling all outputs. Upon de-assertion of an OE pin, the corresponding output will be disabled within 2-6
clock cycles. Asserting an OE pin from disable to enable will take <20 µs for the output to have a clean clock.
Output enabled/disabled for LVCMOS are done in pairs. Each differential buffer True and Compliment output can generate an LVCMOS
clock and the OE pin associated with the True and Compliment output buffer will control the respective LVCMOS pair.
For example: If DIFF0 is configured to be SE1 and DIFF0# is configured to be SE2 and OE1 is the associated OE pin, de-asserting the
OE1 pin will disable both SE1 and SE2 outputs. The disable and enable of the outputs to a known state is glitch free.
I2C Address Pin
This pin sets the LSB of the I2C address. For example, if the I2C address is A6h, setting this pin high will set the I2C address to A7h.
CLKIN_SEL[0:1] Pins
These pins are used to set the input source clock between the input clock channels (Crystal, CLKIN_2/CLKIN_2# or CLKIN_3/
CLKIN_3#). Upon switching the input clock source, the output will not be glitch free. It is intended for the user to set this pin to a known
state before the system is powered up or have the receiver address any unintended output signals when switching to a different input
source clock.
Multi-Profile
Si5332 has the ability to store multiple unique configurations in the same custom part number by enabling multi-profile support in
ClockBuilder Pro after selecting the desired Si5332 device. The ClockBuilder Pro wizard guides users to enter the input/output/feature
set needed for each individual profile configuration, then compiles them together and assigns the necessary number of universal
hardware pins based on the number of profiles entered.
The actual number of profiles supported in a particular design is limited by overall design complexity and NVM size. ClockBuilder Pro
automatically determines the NVM size required for your multi-profile design and will warn if the maximum limit is exceeded.
3.8 Custom Factory Preprogrammed Parts
Custom pre-programmed parts can be ordered corresponding to a specific configuration file generated using the ClockBuilder Pro
software utility. Skyworks writes the configuration file into the device prior to shipping. Use the
custom part number
wizard to quickly and easily generate a custom part number for your ClockBuilder Pro configuration file. A factory pre-programmed part
will generate clocks at power-up.
In less than three minutes, you will be able to generate a custom part number with a detailed data sheet addendum matching your
design’s configuration. Once you receive the confirmation email with the data sheet addendum, simply place an order with your local
Skyworks sales representative. Samples of your pre-programmed device will ship within two weeks.
3.9 I2C Serial Interface
The Si5332 is compatible with rev6 of the I2C specification, including Standard, Fast, and Fast+ modes.
Configuration and operation of the Si5332 can be controlled by reading and writing registers using the I
2
C . Communication with a 1.8 V
to 3.3 V host is supported. See the
Si5332 Family Reference Manual
for details.
Si5332 Data Sheet • Functional Description
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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Rev. 1.3 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 16, 2021
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