89hpes24n3a Integrated Device Technology, 89hpes24n3a Datasheet - Page 13

• Manufacturer Part Number: 89hpes24n3a
• Description: 24-lane, 3-port Pcie I/o Expansion Switch
• Manufacturer: Integrated Device Technology

Thermal Considerations
Recommended Operating Temperature
Power Consumption
(and also listed below).
Table 13 (and also listed below).
is relevant to the thermal performance of the PES24N3A switch.
IDT 89HPES24N3A Data Sheet
Typical power is measured under the following conditions: 25°C Ambient, 35% total link usage on all ports, typical voltages defined in Table 13
Maximum power is measured under the following conditions: 70°C Ambient, 85% total link usage on all ports, maximum voltages defined in
This section describes thermal considerations for the PES24N3A (27mm
Number of active
Lanes per Port
8/8/8
8/4/4
Note: The parameter
can vary with the number of board layers, size of the board, and airflow,
θ
θ
JA
Symbol
JA(effective)
T
T
given above are based on a 10-layer, standard height, full length (4.3”x12.2”) PCIe add-in card.
A(max)
J(max)
θ
θ
P
JB
JC
Watts
Watts
mA
mA
Effective Thermal Resistance, Junction-to-Ambient
1.0V
0.705
0.676
Core Supply
Typ
705
676
Thermal Resistance, Junction-to-Board
Thermal Resistance, Junction-to-Case
θ
JA(eff)
Power Dissipation of the Device
Table 16 Thermal Specifications for PES24N3A, 27x27 mm BXG420 Package
Junction Temperature
is not the absolute thermal resistance for the package as defined by JEDEC (JESD-51). Because resistance
Ambient Temperature
1.1V
Max
1.02
0.93
928
845
Commercial
Parameter
Grade
1.0V
1.037
0.873
PCIe Digital
Typ
1037
873
Table 14 PES24N3A Operating Temperatures
Supply
Table 15 PES24N3A Power Consumption
1.1V
Max
1.104
1247
1004
1.37
13 of 31
1.0V
PCIe Analog
0.415
Typ
0.41
415
409
Supply
2
BXG420 package). The data in Table 16 below contains information that
Value
10.6
1.1V
125
Max
0.477
8.5
7.6
6.8
0.7
3.9
70
0.50
455
434
θ
JA(eff)
is the effective thermal resistance. The values for effective
1.5V
PCIe Termin-
Typ
0.78
0.36
ation Supply
520
360
0
°
Temperature
Units
C to +70
Watts
o
o
o
o
o
C/W
C/W
C/W
C/W
C/W
o
o
C
C
1.575V
Max
0.643
0.97
°
617
408
C Ambient
Maximum for commercial-rated products
3.3V
0.003
0.003
Typ
I/O Supply
1
1
Conditions
1 m/S air flow
2 m/S air flow
Zero air flow
Maximum
Maximum
3.6V
Max
0.004
0.004
1
1
Power
2.9W
2.5W
April 23, 2008
Typ
Total
Power
Max
3.9W
3.2W