ORLI10G datasheet(67/72 Pages) AGERE

67 / 72 page

Agere Systems Inc.

Data Sheet

October 2001

10 Gbits/s, and 12.5 Gbits/s Line Interface FPSC

ORCA ORLI10G Quad 2.5 Gbits/s

Package Parasitics

The electrical performance of an IC package, such as signal quality and noise sensitivity, is directly affected by the

package parasitics. Table 23 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: 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 capacitance of the lead to the near-

est 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 capacitive crosstalk and the capacitive loading

effect of the lead. Resistance values are in m

Ω.

The parasitic values in Table 23 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.

Table 23. ORCA ORLI10G Package Parasitics

5-3862(C)r2

Figure 26. Package Parasitics

Package Type

LSW

LMW

LSL

LML

416-Pin PBGAM

3.52

0.80

235

0.40

1.0

0.25

1.5—5.0

0.5—1.30

680-Pin PBGAM

3.80

1.30

250

0.50

1.0

0.30

2.8—5.0

0.5—1.50

PAD N

LSW

R W

CIRCUIT

BOARD PAD

C M

C 1

LSW

R W

LSL

LMW

C 2

C 1

LML

C 2

LSL

PAD N + 1

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