SI5356A-B04129-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5356A-B04129-GM is an I2C programmable clock generator from Skyworks Solutions. It synthesizes four independent non-integer related frequencies up to 200 MHz using patented MultiSynth technology, ensuring 0 ppm frequency synthesis error. The device features eight CMOS outputs organized into four banks, each independently configurable for 1.8 V, 2.5 V, or 3.3 V logic levels. It accepts a 25/27 MHz crystal or a 5–200 MHz reference clock input. Key electrical parameters include a core supply voltage range of 1.71–3.63 V, typical core current of 45 mA, and period jitter of 50 ps pk-pk (typ) / 75 ps pk-pk (max). It operates in the industrial temperature range of –40 to +85 °C within a 4x4 mm 24-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any frequency from 1 to 200 MHz on each of the 4 output banks with guaranteed 0 ppm frequency synthesis error.
• Configurable triple A spread spectrum allows any clock, any frequency, and any spread amount.
• Programmable output phase adjustment with less than 20 ps error.
• Interrupt pin indicates Loss of Signal (LOS) or Loss of Lock (LOL).

Clock Generators, PLLs, Frequency Synthesizers Applications

• Printers
• Audio/video systems
• DSLAM equipment
• Storage area networks
• Switches/routers

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory-programmed NVM configuration associated with the B04129 suffix, as this determines the default startup frequencies. Confirm that the required operating voltage and temperature range align with system specifications. Ensure proper handling procedures are followed due to moisture sensitivity classification. Validate compatibility with the I2C bus voltage levels used in the target application.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple non-integer related clock frequencies are required from a single source. It replaces multiple discrete oscillators and PLLs, reducing board space and power consumption. Use ClockBuilder Desktop software to generate the necessary register map or NVM file for the desired frequency plan. Ensure the design accommodates the separate VDDO supplies for each output bank if mixed voltage levels are needed.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5356 family of highly flexible, I2C programmable clock generators. The 'A' variant denotes the specific silicon revision supporting the described features. The 'GM' suffix indicates the 24-lead QFN package type. The unique alphanumeric code identifies the custom factory-programmed Non-Volatile Memory (NVM) configuration stored at the factory for immediate operation upon power-up.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional substitutes within the same family include other Si5356A variants with different NVM configurations. For generic replacements without pre-programmed frequencies, standard blank Si5356A devices can be field-programmed. Verify pinout compatibility and electrical specifications before substituting.