Si53019-A02A 19-OUTPUT PCIE GEN3 AND QPI BUFFER Features Nineteen 0.7 V current-mode, PLL or bypass mode HCSL PCIe Gen3 outputs Spread spectrum tolerable 100 MHz /133 MHz PLL 50 ps output-to-output skew operation, supports PCIe and Fixed 0 ps input to output delay QPI Low phase jitter (Intel QPI, PCIe PLL bandwidth SW SMBUS Gen 1/2/3/4 common clock programming overrides the latch compliant) value from HW pin Gen 3 SRNS Compliant 9 selectable SMBUS addresses 100 ps input-to-output delay Fixed internal feedback path Ordering Information: Extended Temperature: 8 dedicated OE pins 40 to 85 C See page 32. Package: 72-pin QFN Applications Pin Assignments Server Data center Storage VDDA 1 54 OE11 GNDA 2 53 DIF 11 IREF 3 52 DIF 11 4 51 OE10 100M 133M DIF 10 HBW BYPASS LBW 5 50 PWRGD / PWRDN 6 49 DIF 10 Description 7 OE9 GND 48 VDDR 8 47 DIF 9 Si53019-A02A CLK IN 9 46 DIF 9 CLK IN 10 45 VDD SA 0 11 44 GND The Si53019-A02A is a 19-output, current mode HCSL differential clock 12 43 OE8 SDA DIF 8 SCL 13 42 SA 1 14 41 DIF 8 buffer that meets all of the performance requirements of the Intel NC 15 40 OE7 NC 16 39 DIF 7 17 38 DIF 7 DB1900Z specification. The device is optimized for distributing reference FB OUT 18 37 OE6 FB OUT clocks for Intel QuickPath Interconnect (Intel QPI), PCIe Gen1/Gen2/Gen3/Gen4, SAS, SATA, and Intel Scalable Memory Note: FB OUT pins must be identically terminated to the other DIF outputs. Interconnect (Intel SMI) applications. The VCO of the device is optimized to support 100 MHz and 133 MHz operation. Each differential output can 2 Patents pending be enabled through I C for maximum flexibility and power savings. The Si53019-A02A features a fixed internal feedback path. Measuring PCIe clock jitter is quick and easy with the Skyworks Solutions PCIe Clock Jitter Tool. Download it for free at Si53019-A02A Functional Block Diagram OE(5 12) 8 FB OUT SSC Compatible DIF 18:0 CLK IN PLL CLK IN 100M 133 HBW BYPASS LBW SA 0 Control SA 1 Logic PWRGD / PWRDN SDA SCL IREF Note: FB OUT pins must be identically terminated to the other DIF outputs. 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.3 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice August 30, 2021