VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
Multi-Rate SONET/SDH
Clock and Data Recovery IC
VSC8122
Table 11: Maximum Ambient Air Temperature Without Heatsink
Airflow
TA(MAX) oC
Still air
100 lfpm
200 lfpm
400 lfpm
600 lfpm
47.2
54.0
57.4
61.8
64.6
Note that ambient air temperature varies throughout the system based on the positioning and magnitude of
heat sources and the direction of air flow.
Ordering Information
The order number for this product is formed by a combination of the device number, and package type.
QP
VSC8122
Device Type
VSC8122: OC-3/12/48 (STM-1/4/16)
Clock and Data Recovery
Package Style
QP: 64-pin, 10 x 10 mm PQFP
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.
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G52228-0, Rev 4.1
01/05/01
Page 13
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