R
Spartan-IIE FPGA Family: Pinout Tables
value similarly reports the difference between the board and
junction temperature. The junction-to-ambient (θJA) value
reports the temperature difference between the ambient
environment and the junction temperature. The θJA value is
reported at different air velocities, measured in linear feet
per minute (LFM). The “Still Air (0 LFM)” column shows the
Package Thermal Characteristics
Table 14 provides the thermal characteristics for the various
Spartan-II FPGA package offerings. This information is also
available using the Thermal Query tool on xilinx.com
(www.xilinx.com/cgi-bin/thermal/thermal.pl).
θ
JA value in a system without a fan. The thermal resistance
drops with increasing air flow.
The junction-to-case thermal resistance (θJC) indicates the
difference between the temperature measured on the
package body (case) and the die junction temperature per
watt of power consumption. The junction-to-board (θJB)
Table 14: Spartan-IIE Package Thermal Characteristics
Junction-to-Ambient (θ
)
JA
at Different Air Flows
Junction-to-Case
(θ
Junction-to-
Still Air
(0 LFM)
Package
Device
)
Board (θ
N/A
N/A
N/A
N/A
N/A
N/A
N/A
17.8
15.1
14.8
11.4
10.1
8.8
)
JB
250 LFM
25.1
24.4
25.9
25.2
25.2
23.9
23.3
21.6
19.5
19.3
16.6
15.6
14.5
19.2
19.0
16.1
15.1
11.7
11.2
11.1
9.9
500 LFM
21.5
20.8
22.9
22.3
22.2
21.2
20.6
20.4
18.2
18.0
15.2
14.2
13.2
18.1
17.9
15.0
13.9
10.5
10.0
9.8
750 LFM
20.1
19.6
21.2
20.7
20.6
19.6
19.1
20.0
17.8
17.6
14.7
13.7
12.6
17.4
17.1
14.3
13.2
10.0
9.5
Units
JC
XC2S50E
5.8
5.3
7.1
6.1
6.0
4.6
4.0
7.3
5.8
5.7
3.9
3.2
2.5
8.4
8.2
6.3
5.6
3.6
2.7
4.1
3.4
32.3
31.4
35.1
34.2
34.1
32.4
31.6
27.4
25.0
24.8
21.9
20.8
19.7
24.3
24.1
21.0
19.9
17.7
17.3
15.6
14.5
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
°C/Watt
TQ144
TQG144
XC2S100E
XC2S50E
XC2S100E
XC2S150E
XC2S200E
XC2S300E
XC2S50E
PQ208
PQG208
XC2S100E
XC2S150E
XC2S200E
XC2S300E
XC2S400E
XC2S100E
XC2S150E
XC2S200E
XC2S300E
XC2S400E
XC2S600E
XC2S400E
XC2S600E
FT256
FTG256
14.9
14.6
11.6
10.4
6.5
FG456
FGG456
5.0
7.9
9.2
FG676
FGG676
6.9
8.6
7.9
56
www.xilinx.com
DS077-4 (2.3) June 18, 2008
Product Specification
XILINX [ XILINX, INC ]
