SI53208-EVB Silicon Labs

UG337: Si53208-EVB Users Guide 8-Output PCI-Express Gen1/2/3/4 and SRIS Clock Buffer Evalua- KEY FEATURES tion Board Evaluation of Silicon Labs Si53208 This document describes operation of the Silicon Laboratories Si53208-EVB evaluation External power or USB powered board. Its designed to evaluate the Si53208, 8-output PCI-Express Gen1/2/3/4 which is an SRIS Clock Buffer. Selector switches make it easy to select the voltage for both DC-coupled differential output clocks core and IO supplies. Jumpers allow for easy static configuration of the control inputs DC-coupled differential input clock as well as provide a port for external test equipment access. Similarly, each regulated Switchable voltage settings supply can be bypassed and driven externally for either precise voltage control or for Easy manual configuration via jumpers measuring PSRR performance. Convenient probe pads and isolation resistors permit Easy current measurement on-board single-ended or differential measurements. Finally, the PCB layout optimizes signal integrity and skew which rounds out the capabilities of this EVB. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 Rev. 0.1 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice July 26, 2021 1Table of Contents 1. Functional Description............................3 2. Power Supply Switch Settings.........................4 2.1 +5 V Selection..............................4 2.2 Voltage Selection for Non-Output Supplies (VDD, VDDA, and VDD AUX)..........5 2.3 Voltage Selection for Output Supply (VDD IO) ...................5 2.4 Measuring Supply Currents (IDD, IDD , and IDD ) .................5 A IO 3. Control Signal Jumper Settings ........................6 4. Output Clock Terminations ..........................7 4.1 Differential Outputs (DIFF 0:7) ........................7 5. External Input Clock.............................8 6. LEDs ..................................9 7. Quick Start Board Configuration Check List.................. 10 8. Board Schematic, BOM, and Layout.......................11 9. Appendix: Typical Waveplots ........................ 12 9.1 Differential Clock (DIFF 0) Output (Differential Waveform) ...............12 9.2 Differential Clock (DIFF 0) Crossing Voltage (100MHz) (Single-ended waveform) .......13 9.3 Differential clock (DIFF 0) Crossing Voltage (200MHz) (Single-ended waveform) .......13 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 Rev. 0.1 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice July 26, 2021 2