Si52144 PCI-EXPRESS GEN 1, GEN 2, & GEN 3 QUAD OUTPUT CLOCK GENERATOR Features PCI-Express Gen 1, Gen 2, Gen 3, Four PCI-Express clocks and Gen 4 common clock compliant 25 MHz crystal input or clock input Gen 3 SRNS Compliant Signal integrity tuning Supports Serial ATA (SATA) at 2 I C support with readback 100 MHz capabilities Low power, push-pull HCSL Triangular spread spectrum profile compatible differential outputs for maximum electromagnetic No termination resistors required interference (EMI) reduction Dedicated output enable hardware Industrial temperature pins for each clock output 40 to 85 C Dedicated hardware pin for spread 3.3 V power supply Ordering Information: spectrum control 24-pin QFN package See page 18 Applications Pin Assignments Network attached storage Wireless access point Multi-function printer Routers Description 24 23 22 21 20 19 The Si52144 is a spread-spectrum enabled PCIe clock generator that can source 1 OE3 VDD DIFF 1 18 four PCIe clocks. The device has four hardware output enable pins for enabling 1 17 VDD DIFF 2 OE1 the outputs, and one hardware pin to control spread spectrum on PCIe clock 2 SSON 16 3 DIFF3 2 25 outputs. In addition to the hardware control pins, I C programmability is also GND DIFF3 15 VSS 4 available to dynamically control skew, edge rate and amplitude on the true, 1 14 DIFF2 OE2 5 compliment, or both differential signals on the PCIe clock outputs. This control 13 DIFF2 VDD DIFF 6 feature enables optimal signal integrity as well as optimal EMI signature on the 7 8 9 10 11 12 PCIe clock outputs. Refer to AN636 for signal integrity and configurability. Measuring PCIe clock jitter Notes: 1. Internal 100 kohm pull-up. is quick and easy with the Skyworks Solutions PCIe Clock Jitter Tool. Download it 2. Internal 100 kohm pull-down. for free at Si52144 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 December 2, 2021