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| 型号： | ICS664G-05LF |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 3/7页 |
| 文件大小： | 0K |
| 描述： | IC CLK SOURCE DGTL VIDEO 16TSSOP |
| 产品变化通告： | Product Discontinuation 09/Feb/2012 |
| 标准包装： | 96 |
| 类型： | 时钟发生器 |
| 应用： | HDTV |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
| 其它名称： | 664G-05LF |
ICS664-05
DIGITAL VIDEO CLOCK SOURCE
CLOCK SYNTHESIZER
IDT / ICS DIGITAL VIDEO CLOCK SOURCE
3
ICS664-05
REV D 100907
Application Information
Series Termination Resistor
Clock output traces should use series termination. To series
terminate a 50
Ωtrace (a commonly used trace impedance),
place a 33
Ωresistor in series with the clock line, as close to
the clock output pin as possible. The nominal impedance of
the clock output is 20
Ω.
Decoupling Capacitors
As with any high-performance mixed-signal IC, the
ICS664-05 must be isolated from system power supply
noise to perform optimally.
Decoupling capacitors of 0.01F must be connected
between each VDD and the PCB ground plane. To further
guard against interfering system supply noise, the
ICS664-05 should use one common connection to the PCB
power plane as shown in the diagram on the next page. The
ferrite bead and bulk capacitor help reduce lower frequency
noise in the supply that can lead to output clock phase
modulation.
Recommended Power Supply Connection for
Optimal Device Performance
All power supply pins must be connected to the same
voltage, except VDDO, which may be connected to a lower
voltage in order to change the output level.
To achieve the absolute minimum jitter, power the part with
a dedicated LDO regulator, which will provide high isolation
from power supply noise. Many companies produce very
small, inexpensive regulators; an example is the National
Semiconductor LP2985.
Crystal Load Capacitors
If a crystal is used, the device crystal connections should
include pads for capacitors from X1 to ground and from X2
to ground. These capacitors are used to adjust the stray
capacitance of the board to match the nominally required
crystal load capacitance. To reduce possible noise pickup,
use very short PCB traces (and no vias) between the crystal
and device.
The value of the load capacitors can be roughly determined
by the formula C = 2(CL - 6) where C is the load capacitor
connected to X1 and X2, and CL is the specified value of the
load capacitance for the crystal. A typical crystal CL is 18 pF,
so C = 2(18 - 6) = 24 pF. Because these capacitors adjust
the stray capacitance of the PCB, check the output
frequency using your final layout to see if the value of C
should be changed.
PCB Layout Recommendations
For optimum device performance and lowest output phase
noise, the following guidelines should be observed.
1) Each 0.01F decoupling capacitor should be mounted on
the component side of the board as close to the VDD pin as
possible. No vias should be used between decoupling
capacitor and VDD pin. The PCB trace to VDD pin should
be kept as short as possible, as should the PCB trace to the
ground via. Distance of the ferrite bead and bulk decoupling
from the device is less critical.
2) The external crystal should be mounted next to the device
with short traces. The X1 and X2 traces should not be
routed next to each other with minimum spaces, instead
they should be separated and away from other traces.
3) To minimize EMI and obtain the best signal integrity, the
33
Ω series termination resistor should be placed close to
the clock output.
4) An optimum layout is one with all components on the
same side of the board, minimizing vias through other signal
layers (the ferrite bead and bulk decoupling capacitor can be
mounted on the back). Other signal traces should be routed
away from the ICS664-05. This includes signal traces just
underneath the device, or on layers adjacent to the ground
plane layer used by the device.
Connection to 3.3V
Power Plane
Ferrite
Bead
Bulk Decoupling Capacitor
(such as 1F Tantalum)
VDD Pin
0.01F
Decoupling
Capacitor
Ferrite
Bead
VDDO Pin
VDDO (+2.5 - +3.3 V)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS664G-05LFT | 功能描述:IC CLK SOURCE DGTL VIDEO 16TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 视频处理 系列:- 产品变化通告:Product Discontinuation 07/Mar/2011 标准包装:3,000 系列:OMNITUNE™ 类型:调谐器 应用:移动电话，手机，视频显示器 安装类型:表面贴装 封装/外壳:65-WFBGA 供应商设备封装:PG-WFSGA-65 包装:带卷 (TR) 其它名称:SP000365064 |
| ICS664GI-01LF | 功能描述:IC CLK SOURCE DGTL VIDEO 16TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 视频处理 系列:- 产品变化通告:Product Discontinuation 07/Mar/2011 标准包装:3,000 系列:OMNITUNE™ 类型:调谐器 应用:移动电话，手机，视频显示器 安装类型:表面贴装 封装/外壳:65-WFBGA 供应商设备封装:PG-WFSGA-65 包装:带卷 (TR) 其它名称:SP000365064 |
| ICS664GI-01LFT | 功能描述:IC CLK SOURCE DGTL VIDEO 16TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 视频处理 系列:- 产品变化通告:Product Discontinuation 07/Mar/2011 标准包装:3,000 系列:OMNITUNE™ 类型:调谐器 应用:移动电话，手机，视频显示器 安装类型:表面贴装 封装/外壳:65-WFBGA 供应商设备封装:PG-WFSGA-65 包装:带卷 (TR) 其它名称:SP000365064 |
| ICS664GI-05LF | 功能描述:IC CLK SOURCE DGTL VIDEO 16TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 视频处理 系列:- 产品变化通告:Product Discontinuation 07/Mar/2011 标准包装:3,000 系列:OMNITUNE™ 类型:调谐器 应用:移动电话，手机，视频显示器 安装类型:表面贴装 封装/外壳:65-WFBGA 供应商设备封装:PG-WFSGA-65 包装:带卷 (TR) 其它名称:SP000365064 |
| ICS664GI-05LFT | 功能描述:IC CLK SOURCE DGTL VIDEO 16TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 视频处理 系列:- 产品变化通告:Product Discontinuation 07/Mar/2011 标准包装:3,000 系列:OMNITUNE™ 类型:调谐器 应用:移动电话，手机，视频显示器 安装类型:表面贴装 封装/外壳:65-WFBGA 供应商设备封装:PG-WFSGA-65 包装:带卷 (TR) 其它名称:SP000365064 |
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