PCI Express (PCIe) Clock Generators Si522xx and Si521xx

We offer the highest performance, lowest power PCI Express Gen1/2/3/4/5 clock generators on the market. All devices feature low-power, push-pull output buffer technology, providing benefits of low-power consumption, reduced external terminating resistors, and smaller packaging. To optimize performance, PCI Express Gen1/2/3/4/5 clock generators support programmable drive strength, rise/fall times and output impedance, as well as down spread spectrum clock generation. The devices support the standard PCIe HCSL signaling format and can be externally terminated to support LVPECL, LVDS or CML levels. Get started with PCI Express.

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PCIe Clock Generator Common Specs

Complete portfolio of PCI Express Gen1/2/3/4/5 clocks and buffers
Wide range of power supply: 1.5 V, 1.8 V, 2.5 V, 3.3 V
Push-pull HCSL output buffer technology
12-bit Analog to Digital converter (ADC)

Low power conumption
Programmable spread spectrum
Individual hardware pin for output enable and spread spectrum control
I²C/SMBus programmable

Supports optional LVPECL, LVDS, or CML levels
-40 to +85 °C operation
Small form factor QFN and TDFN packaging

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Find the PCI Express Clock Select Columns

Select Columns

Part Number	Reference Inputs	Number of Outputs	Output Frequency	Output Format(s)	Description	Control	Phase Jitter (RMS)	VDD (V)	VDDO (V)	Package Type	Package Size (mm)	Clock Generators	Jitter Attenuating Clocks	Synchronous Ethernet/1588	PCIe Compliant	4G/LTE Wireless Clocks	Intel x86 Clocks	Spread Spectrum	Jitter Recommended Range (fs)	Line Impedance Match

Featured Tool

PCIe Clock Jitter Tool

Quickly and easily take jitter measurements for PCIe Gen1/2/3/4 and SRNS/SRIS.

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