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參數(shù)資料
| 型號(hào)： | VSC7126QX |
| 廠商： | VITESSE SEMICONDUCTOR CORP |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | RELAY OPTOMOS 200MA SP-NC 6-SMD |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP80 |
| 封裝： | 14 X 14 MM, PLASTIC, QFP-80 |
| 文件頁(yè)數(shù)： | 15/16頁(yè) |
| 文件大?。?/td> | 223K |
| 代理商： | VSC7126QX |
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VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 805/388-3700 FAX: 805/987-5896
Page 15
3/4/99
VITESSE
Datasheet
VSC7126
1.0625 Gbits/sec Fibre
Channel Transceiver
G52148-0, Rev. 4.3
Package Thermal Characteristics
The VSC7126 is packaged in a 14 mm PQFP with an integrated heat spreader. These packages use indus-
try-standard EIAJ footprints, but have been enhanced to improve thermal dissipation. The construction of the
packages is as shown in Figure 11.
Figure 11: Package Cross Section - 14 mm package
Table 5: Thermal Resistance
The VSC7126 is designed to operate with a case temperature up to 90
o
C. The user must guarantee that the
temperature specification is not violated. With the Thermal Resistances shown above, the 14x14 PQFP can
operate in still air ambient temperatures of 40
o
C (40°C = 90°C - 1.56W * 32°C/W). If the ambient air tempera-
ture exceeds these limits, then some form of cooling through a heatsink or an increase in airflow will be needed.
Moisture Sensitivity Level
This device is rated with a moisture sensitivity level 3 rating. Refer to Application Note AN-20 for appro-
priate handling procedures.
Symbol
θ
jc
θ
ca
Description
14mm Value
Units
Thermal resistance from junction to case
17
o
C/W
Thermal resistance from case to ambient in still air including
conduction through the leads.
32
o
C/W
θ
ca-100
θ
ca-200
θ
ca-400
θ
ca-600
Thermal resistance from case to ambient with 100 LFM airflow
28
o
C/W
Thermal resistance from case to ambient with200 LFM airflow
25
o
C/W
Thermal resistance from case to ambient with 400 LFM airflow
22
o
C/W
Thermal resistance from case to ambient with 600 LFM airflow
20
o
C/W
Copper Heat Spreader
Die
Plastic Molding Compound
Lead
Bond Wire
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