IDT89TTM552BL IDT, Integrated Device Technology Inc, IDT89TTM552BL Datasheet - Page 14

• Manufacturer Part Number: IDT89TTM552BL
• Description: IC TRAFFIC MANAGER 1192-FCBGA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT89TTM552BL

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 89TTM552BL

89TSF500 Thermal Considerations
to air. The device specifications provide
sink (area, height, fin type, etc.) and the airflow across the heat sink. The device specifications also provide the maximum operating junction tempera-
ture (T
under any operating condition. One method of accomplishing this is to calculate the maximum ambient temperature (T
on the above device parameters. The formula is shown below.
IDT 89TSF500
This section describes the temperature and heat sink calculations for flip-chip BGA devices.
The thermal circuit is as shown below.
For flip-chip BGA devices, there are two paths for heat dissipation: one through the package balls to the board and other through the package case
J
T
) that will not degrade the device reliability. The system designer should ensure that the device maximum junction temperature is not exceeded
A
= T
Symbol
J
Ø
Ø
Ø
JA
JB
JC
- W x
For output timing
Ø
Thermal resistance, junction to ambient (no heat sink)
Estimated thermal resistance, junction to board
Thermal resistance, junction to case
Ø
----------------------
JB
JB
x (
+
Z0 = 50Ω
Ø
Ø
JC
JC
+
+
Ø
Ø
Ø
JB
CA
CA
Total Power
= W
and
)
*Notice: The information in this document is subject to change without notice
Device
20 pF
Ø
JC
Parameter
numbers. The
Table 21 89TSF500 Thermal Characteristics
T
Figure 10 89TSF500 Thermal Circuit
J
Figure 9 89TSF500 AC Test Load
50Ω
V
REF
Ø
Ø
JC
JB
Ø
14 of 37
CA
W1
W2 (dissipated through board)
number comes from the heat sink manufacturer and depends on type of heat
Ø
CA
For enable/disable spec
Value Units
T
T
A
A
0.19
9.0
5.5
4.5
2.2
5 pF
°C / W
°C / W
°C / W
°C / W
°C / W
VDD
100Ω
100Ω
Conditions
A
) that can be tolerated based
200 FPM
500 FPM
Still air
November 23, 2004