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| 型号： | 8545BGI |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟及定时 |
| 英文描述： | 8545 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 4 INVERTED OUTPUT(S), PDSO20 |
| 封装： | 6.50 X 4.40 MM, 0.925 MM HEIGHT, MO-153, TSSOP-20 |
| 文件页数： | 12/15页 |
| 文件大小： | 708K |
| 代理商： | 8545BGI |
ICS8545I
LOW SKEW, 1-TO-4, LVCMOS/LVTTL-TO-LVDS FANOUT BUFFER
IDT / ICS LVDS FANOUT BUFFER
6
ICS8545BGI REV. B MARCH 02, 2009
Additive Phase Jitter
The spectral purity in a band at a specific offset from the
fundamental compared to the power of the fundamental is called
the dBc Phase Noise. This value is normally expressed using a
Phase noise plot and is most often the specified plot in many
applications. Phase noise is defined as the ratio of the noise power
present in a 1Hz band at a specified offset from the fundamental
frequency to the power value of the fundamental. This ratio is
expressed in decibels (dBm) or a ratio of the power in the 1Hz band
to the power in the fundamental. When the required offset is
specified, the phase noise is called a dBc value, which simply
means dBm at a specified offset from the fundamental. By
investigating jitter in the frequency domain, we get a better
understanding of its effects on the desired application over the
entire time record of the signal. It is mathematically possible to
calculate an expected bit error rate given a phase noise plot.
As with most timing specifications, phase noise measurements
have issues. The primary issue relates to the limitations of the
equipment. Often the noise floor of the equipment is higher than
the noise floor of the device. This is illustrated above. The device
meets the noise floor of what is shown, but can actually be lower.
The phase noise is dependant on the input source and
measurement equipment.
SSB
Phas
e
Noise
dBc/Hz
Offset Frequency (Hz)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 8545BGILF | 功能描述:时钟缓冲器 1-to-4 LVCMOS/LVTTL- to-LVDS Fanout Buffe RoHS:否 制造商:Texas Instruments 输出端数量:5 最大输入频率:40 MHz 传播延迟（最大值）: 电源电压-最大:3.45 V 电源电压-最小:2.375 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LLP-24 封装:Reel |
| 8545BGILFT | 功能描述:时钟驱动器及分配 1-to-4 LVCMOS/LVTTL- to-LVDS Fanout Buffe RoHS:否 制造商:Micrel 乘法/除法因子:1:4 输出类型:Differential 最大输出频率:4.2 GHz 电源电压-最大: 电源电压-最小:5 V 最大工作温度:+ 85 C 封装 / 箱体:SOIC-8 封装:Reel |
| 8545BGLF | 功能描述:时钟缓冲器 1-to-4 LVCMOS/LVTTL- to-LVDS Fanout Buffe RoHS:否 制造商:Texas Instruments 输出端数量:5 最大输入频率:40 MHz 传播延迟（最大值）: 电源电压-最大:3.45 V 电源电压-最小:2.375 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LLP-24 封装:Reel |
| 8545BGLFT | 功能描述:时钟驱动器及分配 1-to-4 LVCMOS/LVTTL- to-LVDS Fanout Buffe RoHS:否 制造商:Micrel 乘法/除法因子:1:4 输出类型:Differential 最大输出频率:4.2 GHz 电源电压-最大: 电源电压-最小:5 V 最大工作温度:+ 85 C 封装 / 箱体:SOIC-8 封装:Reel |
| 8545BGT | 制造商:Integrated Device Technology Inc 功能描述:Clock Driver 2-IN LVDS 20-Pin TSSOP T/R |
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