VSC6048 Datasheet, PDF (16/18 Pages) Vitesse Semiconductor Corporation – High-Speed Octal Programmable Timing Generator

VITESSE
SEMICONDUCTOR CORPORATION
High-Speed Octal
Programmable Timing Generator
Data Sheet
VSC6048
Package Thermal Characteristics
The VSC6048 is packaged in an 160-pin, 28x28mm thermally-enhanced PQFP with an internal heat
spreader. These packages use industry-standard EIAJ footprints, which have been enhanced to improve thermal
dissipation. The construction of the packages are as shown in Figure 6. The VSC6048 is designed to operate
with a case temperature up to 70^oC. The user must guarantee that the temperature specification is not violated.
Figure 6: Package Cross Section
Exposed Heat Slug
Insulator
Plastic Molding Compound
Lead
Wire Bond
Thermal Epoxy ^Die
Table 10: Thermal Resistance
Symbol
θ_JC
θ_CA-0
θ_CA-100
θ_CA-200
θ_CA-400
θ_CA-600
θ_CA-800
Description
Thermal resistance from junction-to-case
Thermal resistance from case-to-ambient, still air
Thermal resistance from case-to-ambient, 100 LFPM air
Thermal resistance from case-to-ambient, 200 LFPM air
Thermal resistance from case-to-ambient, 400 LFPM air
Thermal resistance from case-to-ambient, 600 LFPM air
Thermal resistance from case-to-ambient, 800 LFPM air
Value
1.3
16.5
14.1
12.3
10.7
9.3
7.9
Units
o_C/W
o_C/W
o_C/W
o_C/W
o_C/W
o_C/W
o_C/W
Page 16
© VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: [phone]
G52335-0,Rev.4.0
8/28/00