9DML2855NDGI8 Renesas

9DML2855 2:8 PCIe Gen15 Clock Multiplexer Datasheet Description Features Flexible Power Sequencing (FPS) ensures good behavior The 9DML2855 is a 2-input, 8-output clock multiplexer supporting when powered up without input clock PCIe Gen5 and DB2000Q applications. It supports today s complex system power sequencing requirements with Power Power-Down Tolerant Input (PDT) inputs: SEL A B , Down Tolerant and Flexible Power Sequencing features. An OE SADR0 tri, OE pins pin for each output supports PCIe CLKREQ functionality. 2 Integrated terminations eliminate 32 resistors, saving 62mm of area Typical Applications 8 OE pins hardware control of each output. SMBus control also available Servers 3 selectable SMBus addresses Enterprise SSDs Spread spectrum compatible tracks spreading input clock for Networking EMI reduction Accelerators Maximum operating frequency of 400MHz 6 6 mm 48-VFQFPN package Key Specifications Output-to-output skew: < 50ps Output Features Additive phase jitter: 8 Low-Power HCSL (LP-HCSL) output pairs with 85 Zout PCIe Gen5 < 20fs RMS 12kHz to 20MHz at 156.25MHz < 100fs RMS PCIe Clocking Architectures DB2000Q < 30fs RMS Common Clocked (CC) IF-UPI < 125fs RMS Independent Reference (IR) with and without Spread Spectrum Backwards compatible to PCIe Gen14 (SRNS, SRIS) Block Diagram VDDR VDD x 9 DIF8 SEL A B DIF8 DIF INA DIF INA 8 DIF INB Outputs DIF INB DIF1 vOE 8:1 DIF1 SMBDAT Logic SMBCLK vSADR0 tri EPAD GND (GND) 2020 Renesas Electronics Corporation 1 March 16, 20209DML2855 Datasheet Contents Description 1 Typical Applications . 1 Key Specifications 1 Features 1 Output Features 1 PCIe Clocking Architectures . 1 Block Diagram . 1 Pin Assignments 3 Input Clock Bias Network 3 Pin Descriptions 4 Absolute Maximum Ratings . 6 Electrical Characteristics . 6 Power Management . 11 Power Connections 11 Test Loads . 12 Alternate Terminations 12 SMBus Addressing . 12 General SMBus Serial Interface Information . 13 Package Outline Drawings . 17 Marking Diagram 17 Ordering Information . 17 Revision History . 17 2020 Renesas Electronics Corporation 2 March 16, 2020