SI5356A Datasheet, PDF (9/29 Pages) Silicon Laboratories – IC PROGRAMMABLE, ANY-FREQUENCY 1–200 MHZ, QUAD FREQUENCY 8-OUTPUT CLOCK GENERATOR

3. Functional Description
Si5356A
3.1. Overview
The Si5356 is a highly flexible, I²C programmable clock
generator capable of synthesizing four independent
frequencies up to 200 MHz. The device has four banks
of outputs with each bank supporting two CMOS
outputs at the same frequency. The Si5356 supports
free-running mode of operation using an external
crystal, or it can lock to an external clock for generating
synchronous clocks. The output drivers support 1.8, 2.5,
and 3.3 V CMOS formats, and each output bank is
independently configurable. Adjustable output-to-output
phase offsets are also available to compensate for PCB
trace delays or for fine tuning of setup and hold
margins.
Configuration and control of the Si5356 is handled
through the I²C/SMBus interface. The device also
provides the option of storing a user-definable clock
configuration in its non-volatile memory (NVM), which
becomes the default clock configuration power-up. See
section "3.5.1. Ordering a Custom NVM Configuration"
on page 12 for details.
3.1.1. ClockBuilder™ Desktop Software
To simplify device configuration, Silicon Labs has
released the ClockBuilder Desktop. The software
serves two purposes: to configure the Si5356 with
optimal configuration based on the desired frequencies,
and to control the EVB, when connected to a host PC.
The optimal configuration can be saved from the
software in text files that can be used in any system,
which configures the device over I²C. ClockBuilder
Desktop can be downloaded from www.silabs.com/
ClockBuilder and runs on Windows XP, Windows Vista,
and Windows 7. Additionally, an NVM file can be
generated using the NVMSave for Factory
Programming... menu option. An NVM file can be used
by factory to prepare custom pre-programmed devices.
Rev. 1.3
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