ORT82G5-1BM680C LATTICE [Lattice Semiconductor], ORT82G5-1BM680C Datasheet - Page 74

• Manufacturer Part Number: ORT82G5-1BM680C
• Description: 0.6 to 3.7 Gbps XAUI and FC FPSCs
• Manufacturer: LATTICE [Lattice Semiconductor]

Lattice Semiconductor
The disadvantage with this scheme is the fact that it is difficult to distribute a 156 MHz reference clock across a
backplane. This may require expensive clock driver chips on the board to drive clocks to different destinations
within the specified jitter limits for the reference clock.
Figure 38. Distributed Reference Clock to Rx And Tx Devices
PORT CARD #1
PORT CARD #2
ORT42G5
ORT82G5
ORT42G5
ORT82G5
or
or
REFCLK
74
T
T
X
X
1
2
ORCA ORT42G5 and ORT82G5 Data Sheet
BACKPLANE
AC
AD
ORT42G5
ORT82G5
or
SWITCH
CARD