A42MX09-3CQ176I View Datasheet(PDF) - Microsemi Corporation
Part Name
Description
Manufacturer
A42MX09-3CQ176I Datasheet PDF : 142 Pages
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40MX and 42MX FPGA Families
Package Thermal Characteristics
The device junction-to-case thermal characteristic is θjc, and the junction-to-ambient air characteristic is
θja. The thermal characteristics for θja are shown with two different air flow rates.
The maximum junction temperature is 150°C.
Maximum power dissipation for commercial- and industrial-grade devices is a function of θja.
A sample calculation of the absolute maximum power dissipation allowed for a TQ176 package at
commercial temperature and still air is given in EQ 2.
Maximum Power Allowed
=
M-----a----x---.---j--u---n---c---t--i-o----n-----t-e----m-----p---.-----(--°---C----)----–----M-----a----x---.---a---m-----b----i-e---n----t---t--e---m-----p---.----(--°---C-----)
θja(°C/W)
=
1----5---0--2--°-8--C--°--C-–----/-7W---0----°---C--
=
2.86 W
EQ 2
The maximum power dissipation for military-grade devices is a function of θjc. A sample calculation of the
absolute maximum power dissipation allowed for CQFP 208-pin package at military temperature and still
air is given in EQ 3.
Maximum Power Allowed
=
M-----a----x---.---j--u---n---c---t--i-o----n-----t-e----m-----p---.-----(--°---C----)----–----M-----a----x---.---a---m-----b----i-e---n----t---t--e---m-----p---.----(--°---C----)-
θjc(°C/W)
=
1----5---0----°---C-----–-----1---2----5---°---C---
6.3°C/W
=
3.97 W
EQ 3
Table 1-21 • Package Thermal Characteristics
Plastic Packages
Plastic Quad Flat Pack
Pin Count
θjc
100
12.0
Plastic Quad Flat Pack
160
10.0
Plastic Quad Flat Pack
208
8.0
Plastic Quad Flat Pack
240
8.5
Plastic Leaded Chip Carrier
44
16.0
Plastic Leaded Chip Carrier
68
13.0
Plastic Leaded Chip Carrier
84
12.0
Thin Plastic Quad Flat Pack
176
11.0
Very Thin Plastic Quad Flat Pack
80
12.0
Very Thin Plastic Quad Flat Pack
100
10.0
Plastic Ball Grid Array
272
3.0
Ceramic Packages
Ceramic Quad Flat Pack
208
2.0
Ceramic Quad Flat Pack
256
2.0
Still Air
27.8
26.2
26.1
25.6
20.0
25.0
22.5
24.7
38.2
35.3
18.3
θja
1.0 m/s
200 ft/min.
23.4
22.8
22.5
22.3
24.5
21.0
18.9
19.9
31.9
29.4
14.9
2.5 m/s
500 ft/min.
21.2
21.1
20.8
20.8
22.0
19.4
17.6
18.0
29.4
27.1
13.9
22.0
19.8
18.0
20.0
16.5
15.0
Units
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
1-26
Revision 11
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