EVM Configuration and Description

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3.3Board Stack-Up

Table 3 shows the board stack-up.

Table 3. Board Stack-Up

 

Subclass

Type

Thickness

Dielectric

Loss

Shield

Width

Impedance

Coupling

Spacing

Diff Zo

 

Name

(mils)

Constant

Tangent

(mils)

(Ω)

Type

(mils)

(Ω)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

SURFACE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

TOP

CONDUCTOR

2.4

1

0

 

7.5

47.72

EDGE

7.5

85.004

 

 

 

 

 

 

 

 

 

 

 

 

3

 

DIELECTRIC

4

4.1

0.035

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

GND

PLANE

1.2

1

0

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

DIELECTRIC

48

4.1

0.035

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

VCC

PLANE

1.2

1

0

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

DIELECTRIC

4

4.1

0.035

 

7.5

47.72

EDGE

7.5

85.004

 

 

 

 

 

 

 

 

 

 

 

 

8

BOTTOM

CONDUCTOR

2.4

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

SURFACE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6 TS3USB221/A/E High Speed USB 2.0 (480 Mbps) 1:2 Multiplexer/Demultiplexer

SCDU001A –July 2009 –Revised October 2009

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Texas Instruments TS3USB221 quick start Board Stack-Up