SI52143

Si52143 PCI-EXPRESS GEN 1, GEN 2, & GEN 3 QUAD OUTPUT CLOCK GENERATOR WITH 25 MHZ REFERENCE CLOCK Features  PCI-Express Gen 1, Gen 2, Gen 3,  Four PCI-Express clocks and Gen 4 common clock compliant  25 MHz reference clock output  Gen 3 SRNS Compliant  25 MHz crystal input or clock input  Supports Serial ATA (SATA) at  Signal integrity tuning 100 MHz  I2C support with readback  Low power, push-pull HCSL capabilities compatible differential outputs  Triangular spread spectrum profile  No termination resistors required for maximum electromagnetic  Dedicated output enable hardware interference (EMI) reduction pins for each clock output  Spread enable pin on differential clocks  Industrial temperature –40 to 85 oC  3.3 V power supply  24-pin QFN package Applications  Network attached storage  Multi-function printer  Wireless access point  Routers Description The Si52143 is a spread-spectrum enabled PCIe clock generator that can source four PCIe clocks and a 25 MHz reference clock. The device has three hardware output enable pins for enabling the outputs (on the fly while powered on), and one hardware pin to control spread spectrum on PCIe clock outputs. In addition to the hardware control pins, I2C programmability is also available to dynamically control skew, edge rate and amplitude on the true, compliment, or both differential signals on the PCIe clock outputs. This control feature enables optimal signal integrity as well as optimal ...