Renesas 9ZXL 1951DNHGI Buffer: 19-Output, PCIe Zero-Latency/Fan-Out Clock Buffer

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Renesas 9ZXL 1951DNHGI Buffer: 19-Output, PCIe Zero-Latency/Fan-Out Clock Buffer

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The Renesas 9ZXL1951DNHGI clock buffer is a second-generation, performance-enhanced DB1900ZL derivative specification buffer. The following are its core features:With the LP-HCSL output featuring 85Ω Zout, 76 terminal resistors can be avoided, thereb…

The Renesas 9ZXL1951DNHGI clock buffer is a second-generation, performance-enhanced DB1900ZL derivative specification buffer. The following are its core features:

With the LP-HCSL output featuring 85Ω Zout, 76 terminal resistors can be avoided, thereby saving 130mm ² of area

The 8 OE# pins can be configured to control up to 16 output channels, facilitating power management

Nine optional SMBus addresses are available for multiple devices to share the same SMBus segment

The selectable PLL bandwidth minimizes the jitter peaks in the cascaded PLL topology

Hardware /SMBus control and bypass mode change for PLL bandwidth without power cycle

Spread-spectrum compatible track expansion input clock is used to reduce EMI

Supports 100MHz PLL mode UPI

The DIF input and DIF output are located on the external pins, facilitating circuit board wiring

6mm x 6mm dual-row 80-GQFN ultra-small 19-channel output Z buffer

Supports PCIe clock architecture

Common Clock (CC

Independent reference (IR), with or without spread spectrum

Output characteristics

19 low-power (LP) HCSL output pairs with 85Ω Zout

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The 9ZXL1951DNHGI reduces drift through a fixed external feedback mechanism and optimizes EMI performance, making it suitable for scenarios with strict requirements for clock stability. ‌

Introduction

This clock buffer is compatible with the 9ZXL1951A pin and features superior phase jitter performance. The 9ZXL1951DNHGI buffer is equipped with 8 OE# pins that can be configured via SMBus, capable of controlling up to 16 of the 19 output channels of the device. The 9ZXL1951DNHGI buffer adopts a 6mm x 6mm QFN package, which can save space to the greatest extent. The 9ZXL1951DNHGI buffer includes fixed external feedback, thereby maintaining low drift for critical QPI/UPI applications. The 9ZXL1951DNHGI buffer is suitable for servers, storage, networks and SSDS.

Typical applications

The 9ZXL1951DNHGI is mainly used for:

Server

nVME storage

"Network

Accelerator

"Industry

In addition, the 9ZXL1951DNHGI also has the following main specifications:

PLL: Yes

Main uses: Intel QPI, PCI Express (PCIe)

Input: Clock

Output: HCSL