Description

The 9SQL4952/9SQL4954/9SQL4958 devices comprise a family

of 3.3V PCIe Gen1–5 clock generators with UPI support. There

are 2, 4 and 8 outputs versions available and each differential

output has a dedicated OE# pin supporting PCIe CLKREQ#

functionality.

Features

▪ Integrated terminations for 85Ω systems save 4 resistors per

output

▪ 112–206 mW typical power consumption (at 3.3V)

▪ VDDIO rail allows 35 power savings at optional 1.05V

(9SQL4958 only)

▪ Devices contain default configuration; SMBus not required

▪ SMBus features allow optimization to application:

• Input polarity and pull-up/pull-downs

• Output slew rate and amplitude

• Output impedance (33Ω, 85Ω or 100Ω)

▪ Contact factory for customized default configurations

▪ 25MHz input frequency

▪ OE# pins support PCIe CLKREQ# function

▪ Pin-selectable SRnS 0, CC 0 and CC/SRIS -0.5 spread

▪ SMBus-selectable CC/SRIS -0.25 spread

▪ Clean switching between the CC/SRIS spread settings

▪ BCLK outputs blocked until PLL is locked for clean system

startup

▪ 2 selectable SMBus addresses

▪ Space-saving packages: See Ordering Information for details

Output Features

▪ 2, 4 or 8 100MHz CPU/PCIe output pairs

▪ One 3.3V LVCMOS REF output with Wake-On-LAN (WOL)

support

▪ See AN-891 for easy AC-coupling to other logic families

9SQL4954属于集成电路（IC） > 应用特定时钟/定时。瑞萨科技有限公司制造生产的9SQL4954应用特定时钟/定时专用时钟和计时 IC（集成电路）产品族中的产品主要用于执行与时间或频率信息生成和分配相关的各种操作，适合的设计环境较特定，例如 AMD 和 Intel 的中央处理单元 (CPU) 或图形处理单元 (GPU)、DVD 音频设备、蓝光光盘播放器、以太网设备、PCIe、SATA、光纤通道接口、车载娱乐总线等。