VSC7127R-QM 查看數據表（PDF） - Vitesse Semiconductor
零件编号
产品描述 (功能)
生产厂家
VSC7127R-QM Datasheet PDF : 12 Pages
| |||
VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
VSC7127/VSC7129
Family of Repeater/Retimer and Port
Bypass Circuits for Fibre Channel
Package Thermal Characteristics
The VSC7127/VSC7129 is packaged in a standard plastic quad flatpack, PQFP, with an embedded, but
unexposed thermal heatslug. This package adheres to industry-standard EIAJ footprints for a 10 mm body, 44
lead PQFP. The package construction is as shown in Figure 6. The 44 PQFP with embedded slug has the thermal
properties shown in Figure 6.
Figure 6: Package Cross Section—10 mm package
Plastic Molding Compound
Copper Heat Spreader
Lead
Bond Wire
Die
Table 5: 44 PQFP Thermal Resistance
Symbol
θCA-0
θCA-100
θCA-200
θCA-400
θCA-600
Description
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
Value
50
43
39
36
34
Units
oC/W
oC/W
oC/W
oC/W
oC/W
The VSC7127/VSC7129 is designed to operate with a case temperature up to 95oC. The user must guaran-
tee that the case temperature specification is not violated. With the thermal resistances shown in Table 5, the
10mm PQFP can operate in still air ambient temperatures of 50oC [50oC = 95oC - 0.9W * 50]. If the ambient air
temperature exceeds these limits, some form of cooling through a heatsink or an increase in airflow must be pro-
vided.
Moisture Sensitivity Level
This device is rated at a Moisture Sensitivity Level 3 rating with maximum floor life of 168 hours at 30ºC,
60% relative humidity. Please refer to Application Note AN-20 for appropriate handling procedures.
G52298-0, Rev 4.3
05/01/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 11
Share Link: 