SI5344H-C05139-GM datasheet, PDF

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SI5344H-C05139-GM: Description100G/400G COHERENT OPTICS CLOCK,; Categorysemiconductor Analog mixed-signal IC; File Size1MB，111 Pages; ManufacturerSilicon Laboratories Inc

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100G/400G COHERENT OPTICS CLOCK,

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Si5344H, Si5342H Family Revision C and D

Reference Manual

High-Frequency, Ultra-Low Jitter Attenuator Clock with Digitally

Controlled Oscillator

This Family Reference Manual is intended to provide system, PCB design, signal integri-

ty, and software engineers the necessary technical information to successfully use the

Si5344H/42H devices in end applications. The official device specifications can be found

in the Si5344H/42H data sheets.

Related Documents:

• Si5344H/42H Data Sheet

• Si5344H-EVB User Guide

KEY FEATURES

• Status monitoring (LOS, OOF, LOL)

• Hitless input clock switching: automatic or

manual

• Automatic free-run and holdover modes

• Glitchless on the fly output frequency

changes

• Locks to gapped clock inputs

• DCO mode: as low as 0.001 ppb steps.

• Core voltage

• V

: 1.8 V ±5%

• V

DDA

: 3.3 V ±5%

• Independent output supply pins: 3.3 V, 2.5

V, or 1.8 V

• Serial interface: I

C or SPI

• In-circuit programmable with non-volatile

OTP memory

• ClockBuilder ProTM software simplifies

device configuratio

• Si5342H: 2 input, 2 output, QFN44

• Si5344H, 2 input, 4 output, QFN44

• Temperature range: –40 to +85 °C

• Pb-free, RoHS-6 compliant

silabs.com

| Building a more connected world.

Rev. 1.1

Si5344H, Si5342H Family Revision C and D Reference Manual

Overview

1. Overview

The Si5344H/42H jitter attenuating clock multipliers combine 4

generation DSPLL and MultiSynth

™

technologies to enable any-fre-

quency clock generation for applications that require the highest level of jitter performance. These devices are programmable via a seri-

al interface with in-circuit programmable non-volatile memory (NVM) ensuring power up with a known frequency configuration. Free-

run, synchronous, and holdover modes of operation are supported offering both automatic and manual input clock switching. The loop

filter is fully integrated on-chip eliminating the risk of potential noise coupling associated with discrete solutions. Further, the jitter at-

tenuation bandwidth is digitally programmable providing jitter performance optimization at the application level.

These devices are capable of generating any combination of output frequency from any input frequency within the specified input and

output range.

1.1 Workflow Expectations with ClockBuilder Pro

™

and the Register Map

This reference manual is to be used to describe all the functions and features of the parts in the product family with register map details

on how to implement them. It is important to understand that the intent is for customers to use the

ClockBuilder Pro software

to provide

the initial configuration for the device. Although the register map is documented, all the details of the algorithms to implement a valid

frequency plan are fairly complex and are beyond the scope of this document. Real-time changes to the frequency plan and other oper-

ating settings are supported by the devices. However, describing all the possible changes is not a primary purpose of this document.

Refer to Applications Notes and

Knowledge Base

article links within the ClockBuilder Pro GUI for information on how to implement the

most common, real-time frequency plan changes.

The primary purpose of the software is that it saves having to understand all the complexities of the device. The software abstracts the

details from the user to allow focus on the high level input and output configuration, making it intuitive to understand and configure for

the end application. The software walks the user through each step, with explanations about each configuration step in the process to

explain the different options available. The software will restrict the user from entering an invalid combination of selections. The final

configuration settings can be saved, written to an EVB and a custom part number can be created for customers who prefer to order a

factory preprogrammed device. The final register maps can be exported to text files, and comparisons can be done by viewing the set-

tings in the register map described in this document.

1.2 Family Product Comparison

The table below lists a comparison of the different family members.

Table 1.1. Product Selection Guide

Part Number

Si5342H

Si5344H

Number of Inputs

Number of MultiSynths

Number of Outputs

Package Type

44-QFN

silabs.com

| Building a more connected world.

Rev. 1.1 | 5

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