SI5345A-B06231-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345A-B06231-GMR is a factory preprogrammed clock synthesizer and jitter attenuator from Skyworks Solutions. It features four inputs and ten outputs, supporting any-frequency generation up to 1028 MHz with integer and fractional synthesis modes. The device utilizes fourth-generation DSPLL and MultiSynth technologies to achieve ultra-low jitter performance of 90 fs rms. It operates within a temperature range of -40°C to +85°C and is housed in a 64-QFN package measuring 9x9 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Combines fourth-generation DSPLL and MultiSynth technologies for high-performance jitter attenuation and any-frequency multiplication.
• Supports free-run, synchronous, and holdover modes with automatic or manual input clock switching capabilities.
• Features an integrated loop filter and digitally programmable jitter attenuation bandwidth for optimized application-level performance.
• Includes in-circuit programmable non-volatile memory to ensure known frequency configuration upon power-up.

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 B06231 suffix against project requirements using ClockBuilder Pro software. Confirm that the QFN-64 package dimensions and pinout match the target PCB layout. Ensure compatibility with the required supply voltages and serial interface protocols before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when applications require ten output clocks with frequencies up to 1028 MHz generated from various input sources. The Si5345A variant supports both integer and fractional synthesis modes, offering greater flexibility than integer-only options. Consider the integrated NVM feature if on-board programming resources are limited or if consistent power-up states are critical.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of jitter attenuators, which also includes the Si5344 (4 outputs) and Si5342 (2 outputs). All variants share similar core technologies but differ in I/O counts and package sizes. The Si5345A specifically denotes the high-frequency capability up to 1028 MHz with mixed-synthesis support.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements include other Si5345A variants with different preprogrammed configurations, such as SI5345A-D-GMR. For lower output count needs, the Si5344A or Si5342A series may be suitable substitutes if pin compatibility allows.