SI5345B-B03147-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345B-B03147-GM is a 10-output jitter attenuator and clock multiplier from the Si5345 family. It utilizes fourth-generation DSPLL and MultiSynth technologies to generate any frequency combination up to 350 MHz with ultra-low jitter of 90 fs rms. The device features four inputs (differential or LVCMOS) and ten highly configurable outputs supporting LVDS, LVPECL, LVCMOS, CML, and HCSL formats. It operates on a 1.8 V core voltage and 3.3 V I/O supply within a -40°C to +85°C temperature range. Configuration is managed via I2C/SPI interfaces with in-circuit programmable non-volatile memory.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any output frequency combination from any input frequency using integer and fractional synthesis.
• Supports hitless input clock switching between fractionally related sources without phase offset propagation.
• Includes automatic and manual input selection with holdover mode for continuous operation during input loss.
• Features digitally programmable jitter attenuation bandwidth and integrated loop filter.

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN muxponders and transponders
• 10/40/100 G networking line cards
• GbE/10 GbE/100 GbE Synchronous Ethernet (ITU-T G.8262)
• Carrier Ethernet switches
• SONET/SDH line cards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix B03147 against the manufacturer's current documentation to confirm factory preprogrammed configuration details. Ensure compatibility with the required serial interface protocol and power supply voltages before integration. Confirm package dimensions match the design footprint.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low jitter performance below 350 MHz is critical. Verify that the required output signal formats (LVDS, LVPECL, etc.) are supported by the specific output pins. Ensure the application can accommodate the QFN-64 package size and thermal requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5345 family of jitter attenuators. It shares the same functional architecture as the Si5345A and Si5345C variants but is optimized for frequencies up to 350 MHz. The 'B' designation typically indicates the frequency range limitation compared to the 'A' variant which supports up to 1028 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute: SI5345B-D-GM. This is a standard version of the same family that may require custom programming if the original was factory preprogrammed.