Si53115 15-OUTPUT PCI E GEN3 BUFFER / ZERO-DELAY B UFFER Features Fifteen 0.7 V low-power, push- Separate VDDIO for outputs pull HCSL PCIe Gen3 outputs PLL or bypass mode 100 MHz /133 MHz PLL Spread spectrum tolerable operation, supports PCIe and 1.05 to 3.3 V I/O supply voltage QPI 50 ps output-to-output skew PLL bandwidth SW SMBUS 50 ps cyc-cyc jitter (PLL mode) programming overrides the latch Low phase jitter (Intel QPI, PCIe value from HW pin Gen 1/2/3/4 common clock 9 selectable SMBUS addresses compliant) SMBus address configurable to Gen 3 SRNS Compliant Ordering Information: allow multiple buffers in a single 100 ps input-to-output delay See page 30. control network 3.3 V supply Extended Temperature: voltage operation 40 to 85 C Pin Assignments 64-pin QFN Applications VDDA 1 48 VDD IO GNDA 2 47 GND Server Data center DIF 9 100M 133M 3 46 DIF 9 HBW BYPASS LBW 4 45 DIF 8 PWRGD / PWRDN 5 44 Storage Enterprise switches and routers GND DIF 8 6 43 VDDR 7 42 GND CLK IN VDD 8 41 Si53115 CLK IN 9 40 DIF 7 SA 0 10 39 DIF 7 Description SDA 11 38 DIF 6 SCL 12 37 DIF 6 SA 1 13 36 VDD IO FBOUT NC 14 35 GND FBOUT NC 15 34 The Si53115 is a 15-output, low-power HCSL differential clock buffer that DIF 5 GND 16 33 DIF 5 meets all of the performance requirements of the Intel DB1200ZL specifi- cation. The device is optimized for distributing reference clocks for Intel QuickPath Interconnect (Intel QPI), PCIe Gen 1/Gen 2/Gen 3/Gen 4, SAS, SATA, and Intel Scalable Memory Interconnect (Intel SMI) applica- Patents pending tions. The VCO of the device is optimized to support 100 MHz and 2 133 MHz operation. Each differential output can be enabled through I C for maximum flexibility and power savings. Measuring PCIe clock jitter is quick and easy with the Skyworks Solutions PCIe Clock Jitter Tool. Down- load it for free at Si53115 Functional Block Diagram FB OUT SSC Compatible DIF 14:0 CLK IN PLL CLK IN 100M 133 HBW BYPASS LBW SA 0 Control SA 1 Logic PWRGD / PWRDN SDA SCL 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.2 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 1, 2021