VSC7139 データシートの表示（PDF） - Vitesse Semiconductor
部品番号
コンポーネント説明
メーカー
VSC7139 Datasheet PDF : 18 Pages
| |||
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Datasheet
VSC7139
Quad Transceiver for
Gigabit Ethernet and Fibre Channel
Pin
B9,F17,G3,K3,
K14,K15,L3,P6,
P8,P10,P12
R6,R10,R12,T2T
6,T8,T10,T12T1
5,U1,U2,U8,U9,
U12,U15
U16, U17
Name
VSS
Ground
Description
Package Thermal Characteristics
The VSC7139 is packaged in a 23 mm BGA package with 1.27mm eutectic ball spacing. The construction
of the package is shown in Figure 6.
Figure 6: Package Cross Section
Copper Heat Spreader
Adhesive
Die Attach Epoxy
Die
Wirebond
Polyimide Dielectric
Encapsulant
Eutectic Solder Balls
The VSC7139 is designed to operate with a case temperature up to 100oC. In order to comply with this tar-
get, the user must guarantee that the case temperature specification of 100oC is not violated. With the Thermal
Resistances shown in Table 8, the VSC7139 can operate in still air ambient temperatures of 56.75oC [ 56.75oC
= 100oC - 2.5W * 17.3oC/W ]. If the ambient air temperature exceeds these limits then some form of cooling
through a heatsink or an increase in airflow must be provided.
Table 8: Thermal Resistance
Symbol
θjc
θca
θca-100
θca-200
θca-400
θca-600
Description
Thermal resistance from junction to case
Thermal resistance from case to ambient in still air including conduction through the leads.
Thermal resistance from case to ambient with 100 LFM airflow
Thermal resistance from case to ambient with200 LFM airflow
Thermal resistance from case to ambient with 400 LFM airflow
Thermal resistance from case to ambient with 600 LFM airflow
Value
1.0
17.3
15.7
14.5
13.0
12.0
Units
oC/W
oC/W
oC/W
oC/W
oC/W
oC/W
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.
G52196-0, Rev 3.3
5/14/01
© 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 15
Share Link: 