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參數(shù)資料
| 型號： | Am7969-125LKC |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| 中文描述： | TAXIchip集成電路（透明異步Xmitter，接收器接口） |
| 文件頁數(shù)： | 75/127頁 |
| 文件大?。?/td> | 730K |
| 代理商： | AM7969-125LKC |
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AMD
71
TAXIchip Integrated Circuits Technical Manual
S ample V alues
Using IBM Type 1 STP 150
shielded twisted pair cable, a successful TAXI link was
established using the following component values:
R1 = 101
R2 = 291
R3 = 300
C = 0.1
μ
F
6.0 BOARD LAY OUT CONS IDERAT IONS
While the TAXIchip devices are digital in application, they are essentially analog parts,
containing high frequency analog Phase Locked Loops. Reliable operation in a high
frequency analog and digital environment requires that some simple board layout rules
be followed.
For example, most TAXI applications which are laid out on a wire wrap board will not
work reliably. Because they have at most one power and ground plane, most wirewrap
cards have insufficient separation between small signal current and digital switching
current. Digital switching noise can couple into the analog PLL, causing phase errors
and loss of synchronization. The preferred realization of a TAXI application is on a
printed circuit board, where the user can control the layout of power and ground planes.
6.1 Printed Circ uit Board Layout
6.1.1 Rules for Layout
The following rules should be followed to ensure minimal noise coupling:
1. Use a PC board with separate GND and V
CC
planes.
2. Use two capacitors which differ by at least a factor of ten in value to decouple the
devices. The reactance of large capacitors has a significant inductive component at
high frequencies. Because of this inductive component, a single large capacitor is not
very effective against high frequency noise. Two capacitors, one typically of 1
μ
F and
one of 0.1
μ
F are more efficient at decoupling than a single large capacitor of 1.1
μ
F.
The recommended layout is as shown in Figure 6-1.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| Am7968-175LKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| Am7969-175LKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7968-125VB3A | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7969-125VB3A | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7968-175JC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM7969-125LMC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7969-125PC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Receiver |
| AM7969-125PCB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Receiver |
| AM7969-125VB3A | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7969-125VBXA | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
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