Industry-leading PCI Express Clock Solutions

Renesas has been first to market in PCI Express clocking and timing since its inception:

With expertise with leading CPU platforms, Renesas is in the optimal position to support all your design needs for processor clocking from personal PCs to data centers and cloud servers. Find your ideal PCIe timing solutions.

Renesas recognizes how challenging it is to balance the system needs of tightening jitter limits, restrictive BOM costs and shrinking board space. Our clocks support diverse requirements including PCI Express, SATA, USB, SAS, DMI, QPI, Hypertransport, Ethernet, etc., and multiple socket CPU architectures.

About PCI Express Clocks

PCI Express is one of the most widely used high-performance peripheral interfaces in the world. From its origins in graphics, fields as diverse as high-performance computing, servers, storage, networking, and instrumentation have adopted PCI Express. This broad application space requires multiple PCI Express clock solutions optimized for the performance/BOM cost/board-space tradeoffs of each application. Renesas' strong partnerships with leading computing, networking and consumer vendors and our participation on the appropriate standards bodies enables us to stay at the forefront of the market with the ideal PCI Express clock and timing solutions (PCIe clocks) for every application.

Three Basic PCIe Reference Clock Architectures

 

CC Architecture

Common Clock
 

SRnS Architecture

Separate Reference No Spread
 

SRIS Architecture

Separate Reference Independent Spread

  
Clock Gen Clock Gen   Clock Gen Clock Gen   Clock Gen
Clock
south		   Clock
south		 Clock
south		   Clock
south		 Clock
south		   Clock
south
Buffer
(optional)		   Buffer
(optional)		 Buffer
(optional)		   Buffer
(optional)		 Buffer
(optional)		   Buffer
(optional)
south   south south   south south   south
CPU/SoC swap_horiz
PCIe
Data		 PCIe Device CPU/SoC swap_horiz
PCIe
Data		 PCIe Device CPU/SoC swap_horiz
PCIe
Data		 PCIe Device
 

Clocks & Timing

Product Selection Table

    Processing table
    Part Number
    Function
    Architecture
    App Jitter Compliance
    Diff. Outputs
    Diff. Output Signaling
    Output Impedance
    Diff. Inputs
    Power Consumption Typ (mW)
    Supply Voltage (V)
    Advanced Features
    Lead Count (#)
    Pkg. Type
    Pkg. Dimensions (mm)
    9SQ440
    CK440Q PCIe Gen6 Server Clock Generator    		 Generator Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 20 LP-HCSL 85 875 3.3 25MHz output(s), 100MHz output(s), PFT, Spread Spectrum 100 VFQFPN 8 x 8 x 0.55, 8.0 x 8.0 x 0.55
    RC19208
    PCIe Gen6 2:8 Clock Multiplexer    		 Multiplexer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 8 LP-HCSL 85, 100 2 250 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 48 VFQFPN 6.0 x 6.0 x 0.9
    RC19204
    PCIe Gen6 2:4 Clock Multiplexer    		 Multiplexer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 4 LP-HCSL 85, 100 2 92 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 28 VFQFPN 4.0 x 4.0 x 0.9
    RC19202
    PCIe Gen6 2:2 Clock Multiplexer    		 Multiplexer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 2 LP-HCSL 85, 100 2 72 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 20 VFQFPN 3.0 x 3.0 x 1.0
    RC19024
    PCIe Gen6 24-Output Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 24 LP-HCSL 85 1 808 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 100 VFQFPN 8.0 x 8.0 x 0.55
    RC19020
    PCIe Gen6 20-Output Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 20 LP-HCSL 85 1 716 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 72, 80 VFQFPN 6.0 x 6.0 x 0.85, 10.0 x 10.0 x 1.0
    RC19016
    PCIe Gen6 16-Output Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 16 LP-HCSL 85, 100 1 508, 498 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 64 VFQFPN 9.0 x 9.0 x 0.9
    RC19013
    PCIe Gen6 13-Output Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 13 LP-HCSL 85, 100 1 363, 320 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 56 VFQFPN 7.0 x 7.0 x 1.0
    RC19008
    PCIe Gen6 8-Output Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 8 LP-HCSL 85, 100 1 237, 231 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 40 VFQFPN 5.0 x 5.0 x 0.9
    RC19004
    PCIe Gen6 4-Output Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 4 LP-HCSL 85, 100 1 128, 125 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 28 VFQFPN 4.0 x 4.0 x 0.9
    RC19216
    PCIe Gen6 2:16 Clock Multiplexer    		 Multiplexer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 16 LP-HCSL 85, 100 2 534 3.3
    Automatic Clock Parking, Flexible Power Sequencing and more...
    		 80 VFQFPN 6.0 x 6.0 x 0.85
    5P35021
    VersaClock® 3S Programmable Clock Generator    		 Generator Common PCIe Gen1, PCIe Gen2, PCIe Gen3 2 LP-HCSL, LVCMOS, LVDS, LVPECL 100 50 1.8, 2.5, 3.3 Programmable Clock, Reference Output, Spread Spectrum 20 VFQFPN 3.0 x 3.0 x 1.0
    5P35023
    VersaClock® 3S Programmable Clock Generator    		 Generator Common PCIe Gen1, PCIe Gen2, PCIe Gen3 2 LP-HCSL, LVCMOS, LVDS, LVPECL 100 50 1.8, 2.5, 3.3 Programmable Clock, Reference Output, Spread Spectrum 24 VFQFPN 4.0 x 4.0 x 0.9
    5P49V6965
    VersaClock® 6E Programmable Clock Generator    		 Generator Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5 4 HCSL, LVCMOS, LVDS, LVPECL 100 100 1.8, 2.5, 3.3 Programmable Clock, Reference Output, Spread Spectrum 24 VFQFPN 4 x 4 x 0.9
    9DML4493
    4:4 Clock MUX for PCI Express Gen1–6    		 Multiplexer Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 4 LP-HCSL 85, 100 4 124 3.3, 2.5, 1.8
    Selectable Output Amplitude, Selectable Output Impedance and more...
    		 32 VFQFPN 5.0 x 5.0 x 0.9
    9FGV1002
    Programmable PhiClock™ Generator    		 Generator Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 4 LP-HCSL, LVDS 85, 100 125 3.3, 1.8 Programmable Clock 24 LGA, VFQFPN 4 x 4 x 0.8, 4.0 x 4.0 x 0.8, 4.0 x 4.0 x 1.4
    9FGV1006
    Programmable PhiClock™ Generator    		 Generator Common, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 2 LP-HCSL 85, 100 100 3.3, 1.8 Programmable Clock 16 LGA 3 x 3 x 1.1, 3.0 x 3.0 x 1.1
    9QXL2000B
    20-Output DB2000Q PCIe Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS
    25G EDR, DB2000Q, IF-UPI, PCIe Gen1, PCIe Gen2, PCIe Gen3 and more...
    		 20 LP-HCSL 85 1 594 3.3 Multiple SMBus addresses 72 VFQFPN 10.0 x 10.0 x 1.0
    9QXL2000C
    20-Output Enhanced DB2000Q PCIe Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS
    25G EDR, DB2000Q, IF-UPI, PCIe Gen1, PCIe Gen2, PCIe Gen3 and more...
    		 20 LP-HCSL 85 1 739 3.3 Multiple SMBus addresses 72 VFQFPN 10.0 x 10.0 x 1.0
    9QXL2001B
    20-Output DB2000QL PCIe Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS
    25G EDR, DB2000Q, IF-UPI, PCIe Gen1, PCIe Gen2, PCIe Gen3 and more...
    		 20 LP-HCSL 85 1 488 3.3 Multiple SMBus addresses, Side Band interface 80 VFQFPN 6.0 x 6.0 x 0.85
    9QXL2001C
    20-Output Enhanced DB2000QL PCIe Clock Buffer    		 Fanout Buffer Common, SRIS, SRNS
    25G EDR, DB2000Q, IF-UPI, PCIe Gen1, PCIe Gen2, PCIe Gen3 and more...
    		 20 LP-HCSL 85 1 720 3.3 Multiple SMBus addresses, Side Band interface 80 VFQFPN 6 x 6 x 0.85, 6.0 x 6.0 x 0.85
    9SQ445
    CK440Q Lite PCIe Gen6 Server Clock Generator    		 Generator Common, SRIS, SRNS PCIe Gen1, PCIe Gen2, PCIe Gen3, PCIe Gen4, PCIe Gen5, PCIe Gen6 6 LP-HCSL 85 1 400 3.3 25MHz output(s), 100MHz output(s), PFT, Spread Spectrum 40 VFQFPN 5.0 x 5.0 x 0.9
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    Documentation

    Title Type Date
    Timing Solutions Products Overview
    PDF872 KB
    Overview
    PCI Express Timing Solutions Overview
    PDF2.40 MB
    Overview
    Clock Distribution Overview
    PDF217 KB
    Overview
    PCIe Reference Clock Jitter Measurements for Gen5 and Beyond
    PDF1.35 MB
    White Paper

    Videos & Training

    PCIe Gen 6 RC19 Family Clock Buffer and Multiplexer Overview

    The RC family are PCIe Gen6 clock buffer and multiplexer solutions provide industry's smallest and most compact footprint.

    Video List

    News & Blog Posts

    Renesas Introduces Industry’s First PCIe Gen6 Clock Buffers and Multiplexers News
    Solving Common Issues with Respect to PCIe Timing Design on the Modern Server System Blog Post Apr 14, 2022
    Future-proof Your PCIe® Designs Blog Post Apr 14, 2022
    Comparing and Contrasting PCIe and Ethernet Clock Jitter Specifications Blog Post May 22, 2018