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OR3T80-6PS240 参数 Datasheet PDF下载

OR3T80-6PS240图片预览
型号: OR3T80-6PS240
PDF下载: 下载PDF文件 查看货源
内容描述: 3C和3T现场可编程门阵列 [3C and 3T Field-Programmable Gate Arrays]
分类和应用: 现场可编程门阵列可编程逻辑
文件页数/大小: 210 页 / 4391 K
品牌: AGERE [ AGERE SYSTEMS ]
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Data Sheet  
June 1999  
ORCA Series 3C and 3T FPGAs  
Package Coplanarity  
represent the contributions of all components of a  
package, which include the bond wires, all internal  
package routing, and the external leads.  
The coplanarity limits of the ORCA Series 3 packages  
are as follows.  
Four inductances in nH are listed: LSW and LSL, the  
self-inductance of the lead; and LMW and LML, 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: CM, the mutual capaci-  
tance of the lead to the nearest neighbor lead; and C1  
and C2, 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, RW, is in M.  
Table 77. Package Coplanarity  
Coplanarity Limit  
Package Type  
(mils)  
EBGA  
PBGA  
8.0  
8.0  
SQFP/SQFP2  
4.0  
3.15  
Package Parasitics  
The parasitic values in Table 78 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 C1 and C2 capacitors.  
The electrical performance of an IC package, such as  
signal quality and noise sensitivity, is directly affected  
by the package parasitics. Table 78 lists eight parasitics  
associated with the ORCA packages. These parasitics  
Table 78. Package Parasitics  
Package Type  
LSW  
LMW  
RW  
C1  
C2  
CM  
LSL  
LML  
208-Pin SQFP  
208-Pin SQFP2  
240-Pin SQFP  
240-Pin SQFP2  
256-Pin PBGA  
352-Pin PBGA  
432-Pin EBGA  
600-Pin EBGA  
4
4
4
4
5
5
4
4
2
2
200  
200  
200  
200  
220  
220  
500  
500  
1
1
1
1
1
1
7—10  
6—9  
4—6  
4—6  
2
1
1
1
8—12  
7—11  
5—8  
5—8  
2
1
1
1
4—7  
2
1
1
1
2—4  
2
1.5  
1
1.5  
1
1.5  
0.3  
0.4  
7—12  
3—5.5  
3—6  
3—6  
1.5  
1.5  
0.5—1  
0.5—1  
1
1
LSW  
RW  
LSL  
BOARD PAD  
PAD N  
C1  
C2  
LMW  
LML  
CM  
PAD N + 1  
LSW  
RW  
LSL  
C1  
C2  
5-3862(F).a  
Figure 104. Package Parasitics  
196  
Lucent Technologies Inc.  
 
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