Si52147 PCI-EXPRESS GEN 1, GEN 2, & GEN 3 NINE-OUTPUT CLOCK GENERATOR Features PCI-Express Gen 1, Gen 2, Gen 3, Up to nine PCI-Express clock outputs and Gen 4 common clock compliant 2 I C support with readback Gen 3 SRNS Compliant capabilities Supports Serial-ATA (SATA) at Triangular spread spectrum profile 100 MHz for maximum electromagnetic Low power push-pull HCSL interference (EMI) reduction compatible differential outputs Industrial temperature: No termination resistors required o 40 to 85 C Output enable pins for all clocks 3.3 V power supply Spread enable pin 48-pin QFN package 25 MHz crystal input or clock input Ordering Information: Applications See page 20. Network attached storage Wireless access point Multi-function printer Servers Pin Assignments Description The Si52147 is a high-performance, PCIe clock generator that can source nine PCIe clocks from a 25 MHz crystal or clock input. The clock outputs are compliant 48 47 46 45 44 43 42 41 40 39 38 37 36 DIFF8 to PCIe Gen 1, Gen 2, Gen 3, Gen 3 SRNS and Gen 4 common clock specifica- VDD DIFF 1 35 DIFF8 VDD DIFF 2 tions. The device has six hardware output enable control pins for enabling and 1 OE DIFF0 34 3 VDD DIFF disabling differential outputs. A spread spectrum control pin for EMI reduction is 1 33 DIFF7 OE DIFF1 4 2 32 DIFF7 SSON 5 also available. The small footprint and low power consumption makes the Si52147 31 DIFF6 VSS DIFF 6 49 the ideal clock solution for consumer and embedded applications. Measuring GND 30 DIFF6 VSS DIFF 7 PCIe clock jitter is quick and easy with the Skyworks Solutions PCIe Clock Jitter 1 29 OE DIFF2 8 VSS DIFF 1 28 DIFF5 OE DIFF3 9 Tool. Download it for free at Si52147 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.4 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 1, 2021