參數(shù)資料
型號： OR3L225B
廠商： Lineage Power
英文描述： Field-Programmable Gate Arrays(現(xiàn)場可編程門陣列)
中文描述： 現(xiàn)場可編程門陣列（現(xiàn)場可編程門陣列）
文件頁數(shù)： 80/88頁
文件大?。?/td> 2015K
代理商： OR3L225B
80
Lucent Technologies Inc.
Data Addendum
December 1999
ORCA OR3LxxxB Series FPGAs
Package Coplanarity
The coplanarity limits of the ORCA Series 3 packages
are as follows.
Table 33. Package Coplanarity
Package Parasitics
The electrical performance of an IC package, such as
signal quality and noise sensitivity, is directly affected
by the package parasitics. Table 34 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
SW
and L
SL,
the
self-inductance of the lead; and L
MW
and L
ML
, the
mutual 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
M
, the mutual capaci-
tance of the lead to the nearest neighbor lead; and C
1
and C
2
, the total capacitance of the lead to all other
leads (all other leads are assumed to be grounded).
These parameters are important in determining capaci-
tive crosstalk and the capacitive loading effect of the
lead. The lead resistance value, R
W
, is in m
.
The parasitic values in Table 34 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
1
and C
2
capacitors.
Package Type
Coplanarity Limit
(mils)
8.0
8.0
3.15
8.0
EBGA
PBGA
SQFP2
PBGAM1
Table 34. Package Parasitics
5-3862(F).a
Figure 12. Package Parasitics
Package Type
208-Pin SQFP2
240-Pin SQFP2
352-Pin PBGA
432-Pin EBGA
680-Pin PBGAM1
L
SW
4
4
5
4
3.8
L
MW
2
2
2
1.5
1.3
R
W
200
200
220
500
250
C
1
1
1
1.5
1
1
C
2
1
1
1.5
1
1
C
M
1
1
1.5
0.3
0.3
L
SL
6—9
7—11
7—12
3—5.5
2.8—5.0
L
ML
4—6
4—7
3—6
0.5—1
0.5—1
PAD N
BOARD PAD
C
M
C
1
L
SW
R
W
L
SL
L
MW
C
2
C
1
L
ML
C
2
PAD N + 1
L
SW
R
W
L
SL
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