OR4E2 datasheet(119/124 Pages) AGERE

119 / 124 page

Lucent Technologies Inc.

119

Preliminary Data Sheet

December 2000

ORCA Series 4 FPGAs

Package Thermal Characteristics

Table 47. ORCA Series 4 FPGAs Plastic Package Thermal Guidelines

Package Coplanarity

The coplanarity limits of the Lucent packages are as follows:

PBGA: 8.0 mils

EBGA: 8.0 mils

PBGAM: 8.0 mils

Package Parasitics

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

package parasitics. Table 48 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 induc-

tance 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 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 capacitive crosstalk and the capacitive loading effect of

the lead. Resistance values are in m

Ω.

The parasitic values in Table 48 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 48. ORCA Series 4 FPGAs Package Parasitics

Package

ΘJA (°C/W)

T = 70 °C Max, TJ = 125 °C Max

0 fpm (W)

0 fpm

200 fpm

500 fpm

352-Pin PBGA

19.0

16.0

15.0

2.9

432-Pin EBGA

11.0

8.5

7.5

5.0

680-Pin PBGAM

14.5

TBD

3.8

Package Type

LSW

LMW

LSL

LML

352-Pin PBGA

220

1.5

7—12

3—6

432-Pin EBGA

4.0

1.5

500

1.0

0.3

3.0—5.5

0.5—1

680-Pin PBGAM

3.8

1.3

250

1.0

0.3

2.8—50.5—1

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