SI5345D-A-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345D-A-GM is a 10-output jitter attenuator and clock multiplier featuring fourth-generation DSPLL and MultiSynth technologies. It supports any-frequency generation with an output range of 0.001 to 350 MHz. The device accepts differential inputs from 8 kHz to 750 MHz or LVCMOS inputs up to 250 MHz. It operates on core voltages of VDD at 1.8 V ±5% and VDDA at 3.3 V ±5%. The component is housed in a 64-QFN 9x9 mm package and functions within a temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis.
• Provides ultra-low jitter performance of 90 fs rms.
• Supports hitless input clock switching between fractionally related clocks.
• Includes in-circuit programmable non-volatile memory for known power-up configurations.

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 ensure correct configuration options. Confirm that the selected part number matches the required output frequency range and package type. Check for availability of factory preprogrammed variants if custom configurations are needed. Ensure compliance with environmental standards such as RoHS-6. Validate serial interface compatibility during integration.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when applications require up to ten outputs with frequencies capped at 350 MHz. Choose this variant over higher-frequency models if cost optimization is prioritized while maintaining low jitter. Verify that the input source supports the specified differential or LVCMOS levels. Ensure the system design accommodates the 64-QFN footprint and thermal requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family, which includes variants like the Si5345A and Si5345B. These devices share the same architecture but differ in maximum output frequency capabilities. The Si5345 series utilizes MultiSynth technology for flexible clock generation. Other family members may support frequencies up to 1028 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other Si5345 variants such as SI5345A-D-GM or SI5345C-D-GM, provided the application does not exceed the 350 MHz output limit. Cross-model substitution with Si5344 or Si5342 requires verifying pinout and output count differences.