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Silicon Laboratories Si5345 - User Manual

Silicon Laboratories Si5345
222 pages
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Rev. 1.0 7/16 Copyright © 2016 by Silicon Laboratories Si5345-44-42-D-RM
ANY-FREQUENCY, ANY-OUTPUT
JITTER-ATTENUATORS/CLOCK MULTIPLIERS
Si5345, Si5344, Si5342 REV. D
F
AMILY REFERENCE MANUAL

Table of Contents

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Summary

ANY-FREQUENCY, ANY-OUTPUT JITTER-ATTENUATORS;CLOCK MULTIPLIERS Si5345, Si5344, Si5342 REV. D FAMILY REFERENCE MANUAL

1. Scope and Overview

Introduces the manual's purpose and the devices' capabilities.

2. DSPLL and MultiSynth Features

Details DSPLL and MultiSynth technologies for clock generation.

3. Modes of Operation

Explains device operating modes like Free-run, Lock-acquisition, Locked, and Holdover.

4. Clock Inputs and Switching

Covers input clock types, selection modes, and fault monitoring.

5. Output Clocks and Signal Formats

Details output configurations, swing modes, and signal formats for drivers.

6. Serial Interface and Communication

Describes I2C and SPI interface configurations and usage.

7. External References and Crystal Recommendations

Covers XAXB external reference clock requirements and crystal selection.

8. PCB Layout Recommendations

Provides guidelines for crystal and device circuit layout for optimal performance.

9. Power Management and Supply

Details power supply recommendations and management features.

10. Register Map Overview

Introduces the register map structure and device types.

11. Si5345 Register Map Details

Detailed register definitions for the Si5345 device.

12. Si5344 Register Definitions

Detailed register definitions for the Si5344 device.

13. Si5342 Register Definitions

Detailed register definitions for the Si5342 device.

Appendix A-Differential Output Driver Settings

Details implementing non-standard output amplitudes via register settings.

Silicon Laboratories Si5345 Specifications

General IconGeneral
CategoryClock Generator
Output Channels12
Number of Outputs12
Input ClocksUp to 4
Package TypeQFN
Operating Temperature Range-40°C to +85°C
Core Supply Voltage1.8 V
Output TypeLVDS, LVPECL, HCSL, CMOS
Power Supply Voltage3.3 V
Supply Voltage2.5V, 3.3V
Operating Temperature-40 to +85 °C

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