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CS497014 Datasheet(PDF) 10 Page - Cirrus Logic

Part No. CS497014
Description  High Definition Audio Decoder DSP Family with Dual 32-bit Engine Technology
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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CS497014 Datasheet(HTML) 10 Page - Cirrus Logic

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CS4970x4 Data Sheet
32-bit High Definition Audio Decoder DSP Family
DS752F1
10
5.5 Thermal Data (128-pin LQFP)
Notes: 1. Two-layer board is specified as a 76 mm X 114 mm, 1.6 mm thick FR-4 material with 1-oz. copper covering 20% of the top and
bottom layers.
2.
Four-layer board is specified as a 76 mm X 114 mm, 1.6 mm thick FR-4 material with 1-oz. copper covering 20% of the top and
bottom layers and 0.5-oz. copper covering 90% of the internal power plane and ground plane layers.
3.
To calculate the die temperature for a given power dissipation
j = Ambient Temperature + [ (Power Dissipation in Watts) * ja ]
4.
To calculate the case temperature for a given power dissipation
c = j - [ (Power Dissipation in Watts) *  jt
Parameter
Symbol
Min
Typ
Max
Unit
Thermal Resistance (Junction to Ambient)
Two-layer Board1
Four-layer Board2
ja
53
44
°C / Watt
Thermal Resistance (Junction to Top of Package)
Two-layer Board1
Four-layer Board2
jt
.45
.39
°C / Watt


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