Si5350/51-B Factory-Programmable Any-Frequency CMOS Clock Generator Description Features The Si5350/51 family of highly flexible, programmable clock generators can be customized to generate up to eight independent non-integer-related frequencies. The devices have eight CMOS clock outputs offered in a space saving 4x4 mm 20-QFN or lower cost three clock output versions offered in a 10-MSOP package. Each output has an independent MultiSynth™ fractional divider that accepts a high-frequency reference from one of the device’s internal PLLs and accurately divides down the clock to generate unique, non-integer-related frequencies from 2.5 kHz to 200 MHz. Any combination of output frequencies can be generated by the device. All clocks are generated with 0 ppm frequency synthesis error, enabling the replacement of XOs and PLL-based clocks while simplifying design and minimizing cost. As an added feature, the Si5350/51 features an integrated VCXO which eliminates the need for pullable crystals. The Si5350 features configurable control pin options allowing the direct pin control of frequency select, output enable, spread spectrum enable and powerdown. Each output supports 1.8, 2.5, or 3.3 V operation, eliminating the need for external level translators in mixed-supply applications. - Generates any frequency on any output - 2.5 kHz to 200 MHz - Exact clock synthesis: 0 ppm error - Similar frequency flexibility as 8 independent PLLs - Accepts crystal or external reference clock - < 70 ps typical period jitter for any configuration - Glitchless switching between output frequencies - Integrated VCXO eliminates need for pullable crystal - Si5350 (pin) and Si5351 (I2C) versions - User-definable control pins: - Frequency select, output enable, spread spectrum enable, powerdown - Spread spectrum clock generation - –0.1 to –2.5% down, ±0.1 to ±1.5% center - Two week sample lead time for any custom clock - Small size: 4x4 mm 20-QFN and 10-MSOP - Industrial temperature range: –40 to +85 Applications - HDTV, DVD/Blu-ray, set-top box Audio/video equipment, gaming Printers, scanners, projectors Audio DAC/CODEC USB Audio Residential gateways Networking/communication Servers, storage VDD XA 10-MSOP VDDO VDD OSC PLL A XB XA OSC PLL A MultiSynth 0 R0 PLL B CLK0 XB PLL B P0 P1 Control Logic MultiSynth 1 MultiSynth 2 GND R1 R2 CLK1 CLK2 20-QFN VDDOA MultiSynth 0 R0 MultiSynth 1 R1 MultiSynth 2 R2 MultiSynth 3 R3 CLK2 CLK3 VDDOC MultiSynth 4 R4 P1 MultiSynth 5 R5 Control Logic CLK1 VDDOB P0 P2 CLK0 CLK4 CLK5 VDDOD P3 MultiSynth 6 R6 P4 MultiSynth 7 R7 CLK6 CLK7 GND Copyright © 2015 by Silicon Laboratories 7.15.15 Si5350/51-B Factory-Programmable Any-Frequency CMOS Clock Generator Example Application—Personal Video Recorder/Blu-Ray Player Storage HDD R Analog Audio Pr L Audio/ Video DAC 24.576MHz Y Pb Component Video R Audio ADC L Video ADC Y Amp Audio/ Video DSP Pb Pr 74.25MHz XA 27 MHz HDMI I/F CLK2 CLK1 CLK0 27MHz Si5350A CLK3 74.25MHz CLK4 48 MHz USB Controller XB CLK5 25/125MHz Ethernet PHY Product Family Matrix Function Free-running clock generator Free-running clock generator+ VCXO Control Input(s) Pin 25, 27 MHz xtal I2C Pin 25, 27 MHz xtal + analog control voltage I2C Free-running and/or synchronous clock generator Pin 25, 27 MHz xtal I2C Outputs/ Pkg 3 (10-MSOP) Part Number Si5350A-B-GT 8 (20-QFN) Si5350A-B-GM Factory programmable 3 (10-MSOP) 8 (20-QFN) Si5351A-B-GT Si5351A-B-GM In-circuit configurable 8 (20-QFN) Si5350B-B-GM 3 (10-MSOP) Si5350B-B-GT Factory programmable 8 (20-QFN) Si5351B-B-GM 8 (20-QFN) Si5350C-B-GM 3 (10-MSOP) Si5350C-B-GT 8 (20-QFN) Si5351C-B-GM Use In-circuit configurable Factory programmable In-circuit configurable Note: To order a factory-customized Si5350 (e.g., Si5350A-Bxxxxx-GT), use ClockBuilder web-based utility www.silabs.com/ClockBuilder. Copyright © 2015 by Silicon Laboratories Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders 7.15.15