Datasheet Si5351 (Skyworks) - 3

Si5351A/B/C-B Si5351C (20-QFN)
VDDOA MultiSynth R0 XA 0 CLK0 PLL OSC A MultiSynth CLK1 R1 XB 1 VDDOB MultiSynth PLL R2 2 CLK2 CLKIN B MultiSynth CLK3 R3 3 VDDOC MultiSynth R4 SDA 4 CLK4 SCL I2C MultiSynth CLK5 R5 5 INTR VDDOD MultiSynth R6 6 CLK6 Control OEB MultiSynth Logic R7 CLK7 7
Si5351A (16-QFN)
VDDOA XA PLL MultiSynth R0 CLK0 OSC A 0 XB VDDOB MultiSynth R1 CLK1 1 PLL VDDOC A0 B MultiSynth R2 CLK2 SDA I2C 2 SCL VDDOD MultiSynth R3 CLK3 3 Control OEB Logic
Si5351B (16-QFN)
VDDOA XA PLL MultiSynth R0 CLK0 OSC A 0 XB VDDOB MultiSynth R1 CLK1 1 vcxo VC VDDOC MultiSynth R2 CLK2 SDA 2 SCL I2C VDDOD MultiSynth R3 CLK3 3 Control OEB Logic
Si5351C (16-QFN)
VDDOA XA PLL MultiSynth R0 CLK0 OSC A 0 XB VDDOB MultiSynth R1 CLK1 1 CLKIN PLL VDDOC B MultiSynth R2 CLK2 SDA 2 I2C VDDOD SCL MultiSynth R3 CLK3 3 Control OEB Logic Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 3 Rev. 1.3 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • August 27, 2021 Document Outline 1. Ordering Guide 2. Technical Support Resources 3. Electrical Specifications 4. Functional Description 4.1. Input Stage 4.1.1. Crystal Inputs (XA, XB) 4.1.2. External Clock Input (CLKIN) 4.1.3. Voltage Control Input (VC) 4.2. Synthesis Stages 4.3. Output Stage 4.4. Spread Spectrum 4.5. Control Pins (OEB, SSEN) 4.5.1. Output Enable (OEB) 4.5.2. Spread Spectrum Enable (SSEN)—Si5351A and Si5351B Only 4.6. Status Pins (INTR) 5. I2C Interface 6. Configuring the Si5351 6.1. Writing a Custom Configuration to RAM 6.2. Si5351 Application Examples 6.3. Replacing Crystals and Crystal Oscillators 6.4. Replacing Crystals, Crystal Oscillators, and VCXOs 6.5. Replacing Crystals, Crystal Oscillators, and PLLs 6.6. Applying a Reference Clock at XTAL Input 6.7. HCSL Compatible Outputs 7. Design Considerations 7.1. Power Supply Decoupling/Filtering 7.2. Power Supply Sequencing 7.3. External Crystal 7.4. External Crystal Load Capacitors 7.5. Unused Pins 7.6. Trace Characteristics 8. Register Map Summary 9. Register Descriptions 10. Si5351 Pin Descriptions 10.1. Si5351A 20-pin QFN 10.2. Si5351B 20-Pin QFN 10.3. Si5351C 20-Pin QFN 10.4. Si5351A 16-Pin QFN 10.5. Si5351B 16-Pin QFN 10.6. Si5351C 16-Pin QFN 10.7. Si5351A 10-Pin MSOP 11. Ordering Information 12. Packaging 12.1. 20-pin QFN Package Outline 12.2. Land Pattern: 20-Pin QFN 12.3. 16-Pin QFN Package Outline 12.4. Land Pattern: 16-Pin QFN 12.5. 10-Pin MSOP Package Outline 12.6. Land Pattern: 10-Pin MSOP 13. Top Marking 13.1. 20-Pin QFN Top Marking 13.2. Top Marking Explanation 13.3. 16-Pin QFN Top Marking 13.4. Top Marking Explanation 13.5. 10-Pin MSOP Top Marking 13.6. Top Marking Explanation Revision History