Datasheet

Termination Cards
7–328
Table 2–4. Termination-Card Stackup
Trace Name Use Layer
Copper
Weight (oz)
Physical
Representation
Dielectric
Height (in.)
Dielectric
Name
Top Data signal 1 0.5
0.004 B stage
V
CC
plane V
CC
plane 2 1
0.004 Core
Ground plane Ground plane 3 1
0.004 B stage
Bottom
Data signal 4 0.5
Groups 2 through 6 have 25-Ω fixed termination resistors due to space
limitations, and have one bypass capacitor for every four termination resistors.
The 25-Ω termination is optimized for estimated 25-Ω loaded-line impedance.
The termination cards can remain installed on the backplane board or be
removed during storage and transit. Both termination cards can be stored in
the same slot in the tray (see Figure 2–14) or stored separately. If stored
together, the resistor/capacitor sides must face each other.
Figure 2–14. Termination-Card Storage