SI5344B-B05434-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344B-B05434-GM is a jitter attenuator and clock multiplier from the Si5344 Rev D family, manufactured by Skyworks Solutions. It features four inputs and four outputs housed in a 44-QFN (7x7 mm) package. The device supports differential input frequencies from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential formats and up to 250 MHz for LVCMOS. It operates on a core voltage of 1.8 V ±5% and an I/O supply of 3.3 V ±5%. The unit achieves ultra-low jitter performance of 90 fs rms and functions within a temperature range of –40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fourth-generation DSPLL technology
• Supports hitless input clock switching with automatic or manual selection capabilities
• Includes in-circuit programmable non-volatile memory for known power-up configurations
• Features fully integrated loop filter to eliminate discrete noise coupling risks

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 against the manufacturer's current documentation to confirm factory preprogramming details. Confirm that the B-series designation aligns with the required 350 MHz maximum output frequency specification for your design. Ensure compatibility with the 44-QFN 7x7 mm package footprint during PCB layout verification.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low jitter attenuation is critical for synchronization applications. The B-series variant limits output frequencies to 350 MHz; choose the A-series if frequencies up to 1028 MHz are required. Verify that the 4-input, 4-output configuration meets system requirements compared to the 2-output Si5342 or 10-output Si5345 variants.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5344 Rev D family, which utilizes MultiSynth and DSPLL technologies. It is distinct from the Si5345 (10 outputs) and Si5342 (2 outputs). The 'B' suffix indicates a maximum output frequency of 350 MHz, whereas 'A' supports up to 1028 MHz. The 'GM' suffix denotes the standard lead-free QFN package.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional substitutes within the same package include other Si5344 Rev D variants such as SI5344A-D-GM for higher frequency needs or SI5344D-D-GM for integer-only synthesis. Cross-family replacements like the Si5345 require pinout and footprint adjustments.