Datasheet > 9ZX21901C

9ZX21901C

更新时间： 2023-12-20 18:46:01

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
21页	508K
描述
19-output DB1900Z Compliant Buffer

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9ZX21901C 数据手册

19-Output Differential Zbuffer for PCIe Gen2/3 9ZX21901C

and QPI

DATASHEET

General Description

Features/Benefits

The 9ZX21901 is Intel DB1900Z Differential Buffer suitable for

PCI-Express Gen3 or QPI applications. The part is backwards

compatible to PCIe Gen1 and Gen2. A fixed external feedback

maintains low drift for critical QPI applications. In bypass

mode, the 9ZX21901 can provide outputs up to 400MHz.

• Fixed feedback path/ 0ps input-to-output delay

• 9 Selectable SMBus addresses; Multiple devices can share

same SMBus segment

• 8 dedicated OE# pins; hardware control of outputs

• PLL or bypass mode; PLL can dejitter incoming clock

• Selectable PLL BW; minimizes jitter peaking in downstream

Recommended Application

• 19-output PCIe Gen3/QPI buffer with fixed feedback for

Romley platforms

PLL's

• Spread spectrum compatible; tracks spreading input clock

for EMI reduction

Output Features

• 19 – 0.7V current mode differential HCSL output pairs

• SMBus Interface; unused outputs can be disabled

• 100MHz & 133.33MHz PLL mode; legacy QPI support

• Undriven differential outputs in Power Down mode for

maximum power savings

Key Specifications

• Cycle-to-cycle jitter: < 50ps

• Output-to-output skew: <65ps

• Input-to-output delay: Fixed at 0 ps

• Input-to-output delay variation: <50ps

• Phase jitter: PCIe Gen3 < 1ps rms

• Phase jitter: QPI 9.6GB/s < 0.2ps rms

Functional Block Diagram

OE(12:5)#

DFB_OUT

DIF(18:0)

Z-PLL

(SS

Compatible)

DIF_IN

DIF_IN#

Bypass path

HIBW_BYPM_LOBW#

100M_133M#

CKPWRGD/PD#

SMB_A0_tri

SMB_A1_tri

Logic

SMBDAT

SMBCLK

IREF

Note: Even though the feedback is fixed, DFB_OUT still

needs a termination network for the part to function.

9ZX21901C REVISION N 11/19/15

12 3 4 5 6 7...21

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与9ZX21901C相关器件

型号	品牌	描述	获取价格	数据表
9ZX21901CKLF	IDT	19-Output Differential Zbuffer for PCIe Gen2/3 and QPI	获取价格
9ZX21901CKLFT	IDT	19-Output Differential Zbuffer for PCIe Gen2/3 and QPI	获取价格
9ZX21901D	IDT	19-Output DB1900Z for PCIe Gen1-4 and QPI/UPI	获取价格
9ZX21901D	RENESAS	Enhanced DB1900Z Compliant 19-Output Buffer	获取价格
9ZX21901DKLF	IDT	19-Output DB1900Z for PCIe Gen1-4 and QPI/UPI	获取价格
9ZX21901DKLFT	IDT	19-Output DB1900Z for PCIe Gen1-4 and QPI/UPI	获取价格