ORT82G5-1BM680C LATTICE [Lattice Semiconductor], ORT82G5-1BM680C Datasheet - Page 116

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

Lattice Semiconductor
Table 46. Heat Sink Vendors
Package Parasitics
The electrical performance of an IC package, such as signal quality and noise sensitivity, is directly affected by the
package parasitics. Table 47 lists eight parasitics associated with the ORCA packages. These parasitics represent
the contributions of all components of a package, which include the bond wires, all internal package routing, and
the external leads.
Four inductances in nH are listed: L
inductance to the nearest neighbor lead. These parameters are important in determining ground bounce noise and
inductive crosstalk noise. Three capacitances in pF are listed: C
est neighbor lead; and C
to be grounded). These parameters are important in determining capacitive crosstalk and the capacitive loading
effect of the lead. Resistance values are in mΩ.
The parasitic values in Table 47 are for the circuit model of bond wire and package lead parasitics. If the mutual
capacitance value is not used in the designer’s model, then the value listed as mutual capacitance should be
added to each of the C
Table 47. ORCA Typical Package Parasitics
Figure 41. Package Parasitics
Package Outline Drawings
Package Outline Drawings for the 484-ball PBGAM (fpBGA) used for the ORT42G5 and 680-ball PBGAM (fpBGA)
used for the ORT82G5 are available in the Package Diagrams section of the Lattice Semiconductor web site at
www.latticesemi.com.
Aavid Thermalloy
Chip Coolers
IERC
R-Theta
Sanyo Denki
Wakefield Thermal Solutions
L
3.8
SW
1
PAD N + 1
and C
1
PAD N
and C
Package
Pads
L
Vendor
1.3
MW
2
capacitors.
2
, the total capacitance of the lead to all other leads (all other leads are assumed
SW
L
L
L
250
R
MW
SW
SW
W
and L
C
M
R
R
SL,
W
W
1.0
C
the self-inductance of the lead; and L
1
Concord, NH
Warwick, RI
Burbank, CA
Buffalo, NY
Torrance, CA
Pelham, NH
116
C
C
1
1
L
ORCA ORT42G5 and ORT82G5 Data Sheet
L
L
ML
SL
SL
Location
1.0
C
2
M
, the mutual capacitance of the lead to the near-
C
C
2
2
C
0.3
M
Circuit
Board Pads
Pad N+1
Pad N
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
2.8-5
L
SL
Phone
MW
and L
0.5 -1
L
ML
ML
, the mutual