SI50122-A3-EVB Silicon Labs

Si50122-A3/A4 CRYSTAL-LESS PCI-EXPRESS GEN 1 & GEN 2 DUAL OUTPUT CLOCK GENERATOR Features Crystal-less clock generator with Triangular spread spectrum integrated CMEMS profile for maximum EMI reduction (Si50122-A4) PCI-Express Gen 1/2 compliant Industrial Temperature 40 to Two PCIe 100 MHz differential 85 C HCSL outputs 2.5 V, 3.3 V Power supply One 25 MHz single-ended LVCMOS output Small package 10-pin TDFN (2.0x2.5 mm) Supports Serial (ATA) at 100 MHz Si50122-A3 does not support Ordering Information: spread spectrum outputs Low power differential output See page 10 buffers Si50122-A4 supports 0.5% down spread outputs No termination resistors required for differential output clocks Pin Assignments Applications VSS 1 10 Digital TV Network Attached Storage VDD Set top box Multi-function Printer REFOUT 2 9 VDD Solid State Drives (SSD) Wireless Access Point NC 3 8 DIFF2 Wireless Access Point Digital Video Cameras DIFF1 4 7 DIFF2 Home Gateway 5 6 DIFF1 VSS Description Si50122-A3/A4 is a high performance, crystal-less PCIe clock generator that can generate two 100 MHz PCIe clock and one 25 MHz LVCMOS Patents pending clock outputs. The differential clock outputs are compliant to PCIe Gen1 and Gen 2 specifications. The ultra-small footprint (2.0x2.5mm) and industry leading low power consumption make Si50122-A3/A4 the ideal clock solution for consumer and embedded applications where board space is limited and low power is needed. Functional Block Diagram VDD REFOUT DIFF1 PLL CMEMS Divider (SSC) DIFF2 VSS Rev 0.7 9/14 Copyright 2014 by Silicon Laboratories Si50122-A3/A4Si50122-A3/A4 2 Rev 0.7