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B9946

更新时间: 2024-02-23 07:22:56
品牌 Logo 应用领域
赛普拉斯 - CYPRESS 时钟
页数 文件大小 规格书
5页 60K
描述
3.3V, 160-MHz, 1:10 Clock Distribution Buffer

B9946 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:QFP包装说明:TQFP-32
针数:32Reach Compliance Code:compliant
HTS代码:8542.39.00.01风险等级:5.92
Is Samacsys:N系列:9946
输入调节:MUXJESD-30 代码:S-PQFP-G32
长度:7 mm逻辑集成电路类型:LOW SKEW CLOCK DRIVER
最大I(ol):0.02 A功能数量:1
反相输出次数:端子数量:32
实输出次数:10最高工作温度:85 °C
最低工作温度:-40 °C输出特性:3-STATE
封装主体材料:PLASTIC/EPOXY封装代码:TQFP
封装等效代码:TQFP32,.35SQ,32封装形状:SQUARE
封装形式:FLATPACK, THIN PROFILE峰值回流温度(摄氏度):NOT SPECIFIED
电源:3.3 VProp。Delay @ Nom-Sup:11.5 ns
传播延迟(tpd):11.5 ns认证状态:Not Qualified
Same Edge Skew-Max(tskwd):0.25 ns座面最大高度:1.2 mm
子类别:Clock Drivers最大供电电压 (Vsup):3.63 V
最小供电电压 (Vsup):2.97 V标称供电电压 (Vsup):3.3 V
表面贴装:YES温度等级:INDUSTRIAL
端子形式:GULL WING端子节距:0.8 mm
端子位置:QUAD处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7 mm最小 fmax:160 MHz
Base Number Matches:1

B9946 数据手册

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B9946  
3.3V, 160-MHz, 1:10 Clock Distribution Buffer  
Product Features  
Description  
• 160-MHz Clock Support  
The B9946 is a low-voltage clock distribution buffer with the  
capability to select one of two LVCMOS/LVTTL compatible in-  
put clocks. These clock sources can be used to provide for test  
clocks as well as the primary system clocks. All other control  
inputs are LVCMOS/LVTTL compatible. The 10 outputs are  
3.3V LVCMOS or LVTTL compatible and can drive two series  
terminated 50transmission lines. With this capability the  
B9946 has an effective fanout of 1:20.  
• LVCMOS/LVTTL Compatible Inputs  
• 10 Clock Outputs: Drive up to 20 Clock Lines  
• 1X or 1/2X Configurable Outputs  
• Output Three-state Control  
• 250 ps Maximum Output-to-Output Skew  
• Pin Compatible with MPC946  
• Industrial Temp. Range: –40°C to +85°C  
• 32-Pin TQFP Package  
The B9946 is capable of generating 1X and 1/2X signals from  
a 1X source. These signals are generated and retimed inter-  
nally to ensure minimal skew between the 1X and 1/2X sig-  
nals. SEL(A:C) inputs allow flexibility in selecting the ratio of  
1X to1/2X outputs.  
The B9946 outputs can also be three-stated via MR/OE# in-  
put. When MR/OE# is set HIGH, it resets the internal flip-flops  
and three-states the outputs.  
Pin Configuration  
Block Diagram  
TCLK_SEL  
/1  
TCLK0  
0
/2  
TCLK1  
1
R
0
TCLK_SEL  
VDD  
1
2
3
4
5
6
7
8
24  
23  
22  
21  
VSS  
QB0  
VDDC  
QB1  
3
QA0:2  
QB0:2  
1
TCLK0  
TCLK1  
DSELA  
DSELB  
DSELC  
VSS  
DSELA  
DSELB  
B9946 20 VSS  
0
1
3
4
19  
18  
17  
QB2  
VDDC  
VDDC  
0
1
QC0:3  
DSELC  
MR/OE#  
Cypress Semiconductor Corporation  
3901 North First Street  
San Jose  
CA 95134  
408-943-2600  
Document #: 38-07077 Rev. *C  
Revised December 22, 2002  

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