vsc870 Vitesse Semiconductor Corp, vsc870 Datasheet - Page 40

• Manufacturer Part Number: vsc870
• Description: High Performance Serial Backplane Transceiver
• Manufacturer: Vitesse Semiconductor Corp

Page 40
High Performance Serial
Backplane Transceiver
Notice
Vitesse Semiconductor Corporation (“Vitesse”) provides this document for informational purposes only. All information in this document, includ-
ing descriptions of features, functions, performance, technical specifications and availability, is subject to change without notice at any time. Noth-
ing contained in this document shall be construed as extending any warranty or promise, express or implied, that any Vitesse product will be
available as described or will be suitable for or will accomplish any particular task.
Vitesse products are not intended for use in life support appliances, devices or systems. Use of a Vitesse product in such applications without writ-
ten consent is prohibited.
Package Thermal Characteristics
surface configurations are shown in the package drawings. With natural convection, the junction-to-case thermal
resistance is estimated to be 1.49
Table 8. Refer to the application note AN-36 for thermal management and selection of heat sinks.
Table 8: Theta Junction-to-Ambient versus Air Velocity
Ordering Information
High Performance Serial
Backplane Transceiver
Device Type
The VSC870 is packaged in a thermally-enhanced 21mm 192TBGA with an embedded heat sink. The heat sink
The order number for this product is formed by a combination of the device number and package type.
Air Velocity (LFPM)
100
200
400
600
0
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
VSC870 xx
Tel: (800) VITESSE • FAX: [phone] • Email: [e-mail]
o
C/W. The approximate air flow versus thermal resistance relationship is shown in
VITESSE
SEMICONDUCTOR CORPORATION
Low Conductivity
Two Layer Board
TX: 192 BGA
Package
Junction-to-Ambient Thermal Resistance (
35.0
30.0
26.0
22.0
20.0
Internet: www.vitesse.com
Extended Commerical Temperature: 0°C ambient to +85°C case
High Conductivity
Four Layer Board
o
25.0
22.0
20.0
17.5
16.5
C/W)
VSC870
Data Sheet
G52190-0, Rev 4.1
01/05/01