SI5344D-B08152-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344D-B08152-GM is a low-jitter, four-output clock synthesizer and jitter attenuator from the Si5344 Rev D family. It utilizes fourth-generation DSPLL and MultiSynth technologies to generate any frequency combination from any input source. The device supports differential inputs up to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz in differential formats (LVDS, LVPECL, CML) or up to 250 MHz in LVCMOS/HCSL. Key electrical parameters include a core voltage of 1.8 V ±5% and an auxiliary supply of 3.3 V ±5%. It operates within a temperature range of –40 °C to +85 °C and is housed in a 44-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any output frequency combination from any input frequency using integer and fractional synthesis modes.
• Features ultra-low jitter performance with a programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz.
• Supports hitless input clock switching between fractionally related sources and glitchless on-the-fly frequency changes.
• Includes in-circuit programmable non-volatile memory for automatic power-up configuration and holdover mode support.

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 factory preprogrammed configuration associated with the B08152 suffix against the target design requirements. Confirm that the required serial interface protocol (I2C or SPI) matches the system controller capabilities. Ensure the external crystal specifications align with the recommended 48 MHz to 54 MHz range for optimal jitter performance. Check for any applicable product change notifications or errata documents relevant to the Rev D silicon revision before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when fractional synthesis is required for outputs up to 350 MHz. The Si5344D variant specifically supports both integer and fractional output division, distinguishing it from the Si5344C which is integer-only. Ensure the application requires four independent outputs; if more channels are needed, consider the Si5345 series. Verify that the 44-QFN package footprint fits the PCB layout constraints and that the thermal dissipation characteristics meet the system's power budget.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuators. The 'D' designation indicates support for fractional output synthesis up to 350 MHz. The 'B' prefix denotes a custom factory preprogrammed part number assigned by Skyworks based on a specific ClockBuilder Pro configuration. This distinguishes it from generic programmable variants like the SI5344D-D-GM, which require user-side programming.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements within the same package and pinout include other Si5344D variants such as SI5344D-D-GM or SI5344D-Dxxxxx-GM, provided the specific frequency plan is reconfigured. For applications requiring higher output counts, the Si5345D series offers ten outputs but uses a different 64-QFN package. Upgrading to the Si5344A-D variant provides extended output frequency capability up to 1028 MHz.