Si522xx and Si521xx PCIe Clock Generators

Silicon Labs offers the highest performance, lowest power PCI-Express Gen1/2/3/4 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, the devices support programmable drive strength, rise/fall times, and output impedance. Down spread spectrum clock generation is also supported. The devices support the standard PCIe HCSL signaling format and can be externally terminated to support LVPECL, LVDS, or CML levels. 

Features

  • Complete portfolio of PCI Express Gen1/2/3/4 clocks/buffers
  • Wide range of power supply: 1.5V, 1.8V, 2.5V, 3.3V
  • Push-pull HCSL output buffer technology
  • Fully integrated termination resistors on PCIe outputs
  • Low power consumption
  • 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

Get Started with PCI-Express

Learn about PCIe standard timing requirements and how Silicon Labs' timing solution can provide the optimal timing solution for your design. Get your PCIe Gen1/2/3/4 compliance report with the easy-to-use Silicon Labs' PCIe Clock Jitter tool.

Product Matrix

Devices
Part Number Data Sheet Dev KIt Description Control Reference Inputs Output Frequency (MHz) Output Format(s) Phase Jitter (RMS) (ps) VDD (V) VDDO (V) Package Type Package Size (mm) Clock Generators Jitter Attenuating Clocks Synchronous Ethernet/1588 PCI Express Clocks 4G/LTE Wireless Clocks Intel x86 Clocks
Timing Kits 1-Output PCIe Gen1 Clock Generator 1 100 100 HCSL 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 1-Output PCIe Gen1 Clock Gen with SS 1 100 100 HCSL 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 1-Output PCIe Gen2 Clock Generator 1 100 100 HCSL 1.4 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 1-Output PCIe Gen2 Clock Gen with SS 1 100 100 HCSL 1.4 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 1-Output PCIe Gen3 Clock Generator 1 100 100 HCSL 0.4 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 1-Output PCIe Gen3 Clock Gen with SS 1 100 100 HCSL 0.4 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 2-Output PCIe Gen1 Clock Generator 1 100 100 HCSL 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 2-Output PCIe Gen1 Clock Gen with SS 1 100 100 HCSL 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 2-Output PCIe Gen2 Clock Generator 1 100 100 HCSL 1.4 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 2-Output PCIe Gen2 Clock Gen with SS 1 100 100 HCSL 1.4 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 2-Output PCIe Gen3 Clock Generator 1 100 100 HCSL 0.4 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 2-Output PCIe Gen3 Clock Gen with SS 1 100 100 HCSL 0.4 3.3 3.3 TDFN10 3x3 Yes No No Yes No No
Timing Kits 2-Output PCIe Gen1/2/3 Clock Gen-25M Ref I2C/Pin 1 25 100 HSCL; LVCMOS 1 3.3 3.3 QFN24 4x4 Yes No No Yes No No
Timing Kits 4-Output PCIe Gen1/2/3 Clock Gen-25M Ref I2C/Pin 1 25 100 HSCL; LVCMOS 1 3.3 3.3 QFN24 4x4 Yes No No Yes No No
Timing Kits 4-Output PCIe Gen1/2/3 Clock Generator I2C/Pin 1 100 100 HSCL 1 3.3 3.3 QFN24 4x4 Yes No No Yes No No
Timing Kits 6-Output PCIe Gen1/2/3 Clock Generator I2C/Pin 1 100 100 HSCL 1 3.3 3.3 QFN32 5x5 Yes No No Yes No No
Timing Kits 9-Output PCIe Gen1/2/3 Clock Generator I2C/Pin 1 100 100 HSCL 1 3.3 3.3 QFN48 5x5 Yes No No Yes No No
Si52204-EVB 1.5-1.8V 2-output PCIe Gen1/2/3/4 Clock Generator, with 100Ω internal termination I2C/Pin 1 100 100 HCSL 0.4 1.5-1.8 1.5-1.8 QFN20 3x3 Yes No No Yes No No
Si52204-EVB 1.5-1.8V 2-output PCIe Gen1/2/3/4 Clock Generator, with 85Ω internal termination I2C/Pin 1 100 100 HCSL 0.4 1.5-1.8 1.5-1.8 QFN20 3x3 Yes No No Yes No No
Si52204-EVB 1.5-1.8V 4-output PCIe Gen1/2/3/4 + 25MHz LVCMOS Clock Generator, with 100Ω internal termination I2C/Pin 1 25 100 HCSL; LVCMOS 0.4 1.5-1.8 1.5-1.8 QFN32 5x5 Yes No No Yes No No
Si52204-EVB 1.5-1.8V 4-output PCIe Gen1/2/3/4 + 25MHz LVCMOS Clock Generator, with 85Ω internal termination I2C/Pin 1 25 100 HCSL; LVCMOS 0.4 1.5-1.8 1.5-1.8 QFN32 5x5 Yes No No Yes No No
Si52204-EVB 1.5-1.8V 8-output PCIe Gen1/2/3/4 + 25MHz LVCMOS Clock Generator, with 100Ω internal termination I2C/Pin 1 25 100 HCSL; LVCMOS 0.4 1.5-1.8 1.5-1.8 QFN48 6x6 Yes No No Yes No No
Si52204-EVB 1.5-1.8V 8-output PCIe Gen1/2/3/4 + 25MHz LVCMOS Clock Generator, with 85Ω internal termination I2C/Pin 1 25 100 HCSL; LVCMOS 0.4 1.5-1.8 1.5-1.8 QFN48 6x6 Yes No No Yes No No
Si52204-EVB 1.5-1.8V 12-output PCIe Gen1/2/3/4 + 25MHz LVCMOS Clock Generator, with 100Ω internal termination I2C/Pin 1 25 100 HCSL; LVCMOS 0.4 1.5-1.8 1.5-1.8 QFN64 9x9 Yes No No No No No
Si52204-EVB 1.5-1.8V 12-output PCIe Gen1/2/3/4 + 25MHz LVCMOS Clock Generator, with 85Ω internal termination I2C/Pin 1 25 100 HCSL; LVCMOS 0.4 1.5-1.8 1.5-1.8 QFN64 9x9 Yes No No Yes No No
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