9QXL2001B 20-Output DB2000QL Datasheet Description Features Two Output Enable Control modes: The 9QXL2001B is a 20-output very-low-additive phase jitter fanout buffer for PCIe Gen4, Gen5 and UPI applications. The Traditional 8 OE pins allow hardware control of 8 outputs 9QXL2001B provides two methods to control output enables and 20 SMBus bits allow software control of each output standard OE pins and SMBus enable bits, or a simple 3-wire Simple 3-wire Side-Band Interface allows real-time control serial interface that is independent of the SMBus. The OE Control of all 20 outputs Mode is set via a hardware strap. It offers integrated terminations Outputs remain Low/Low when powered up with floating input for 85 transmission lines. clock Low-Power HCSL (LP-HCSL) outputs: PCIe Clocking Architectures 2 Zo = 85 outputs eliminate 80 resistors, saving 130mm of Common Clocked (CC) area Independent Reference (IR) with and without spread spectrum Power consumption reduced by 50% 9 selectable SMBus addresses Typical Applications Spread spectrum compatible 6 6 mm dual-row 80-GQFN Servers, Storage, Networking, Accelerators Output Features Key Specifications Output-to-output skew: < 50ps 20 Low-Power HCSL (LP-HCSL) 85 output pairs Additive phase jitter: DB2000Q < 25fs rms Additive phase jitter: PCIe Gen4 < 40fs rms Additive phase jitter: PCIe Gen5 < 20fs rms Block Diagram VDDA3.3 VDDR3.3 VDDO3.3 x 4 DIF IN DIF19 DIF IN DIF19 vSADR0 tri 20 vSADR1 tri SMBus Factory outputs Engine Configuration SMBCLK SMBDAT DIF0 vCKPWRGD PD DIF0 vOE 7:9,11,12 Control Logic vOE5 /DATA vOE6 /CLK vOE10 /SHFT LD vSBEN EPAD/GND 2021 Renesas Electronics Corporation 1 R31DS0056EU0100 September 7, 20219QXL2001B Datasheet Contents Description 1 PCIe Clocking Architectures . 1 Typical Applications . 1 Key Specifications 1 Features 1 Output Features 1 Block Diagram . 1 Pin Assignments 3 Pin Descriptions 4 Output Control . 7 Power Management . 7 Output Enable Control on 9QXL2001B (DB2000QL) 8 Traditional Method . 8 Side-Band Interface 8 Absolute Maximum Ratings 10 Thermal Characteristics . 10 Electrical Characteristics 11 Test Loads . 15 Alternate Terminations 16 SMBus Addressing . 16 General SMBus Serial Interface Information . 17 How to Write . 17 How to Read . 17 Package Outline Drawings . 22 Marking Diagram 22 Ordering Information . 22 Revision History . 23 2021 Renesas Electronics Corporation 2 R31DS0056EU0100 September 7, 2021