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IO165RSB2 Datasheet(PDF) 10 Page - Microsemi Corporation |
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IO165RSB2 Datasheet(HTML) 10 Page - Microsemi Corporation |
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10 / 210 page  ProASIC3 Flash Family FPGAs Re vi s i on 15 2 - 5 The absolute maximum junction temperature is 100°C. EQ 1 shows a sample calculation of the absolute maximum power dissipation allowed for a 484-pin FBGA package at commercial temperature and in still air. EQ 1 Maximum Power Allowed Max. junction temp. ( °C) Max. ambient temp. (°C) – θ ja(°C/W) ------------------------------------------------------------------------------------------------------------------------------------------ 100 °C70°C – 20.5 °C/W ------------------------------------- 1.463 W · = = = Table 2-5 • Package Thermal Resistivities Package Type Device Pin Count θjc θja Units Still Air 200 ft./min. 500 ft./min. Quad Flat No Lead A3P030 132 0.4 21.4 16.8 15.3 °C/W A3P060 132 0.3 21.2 16.6 15.0 °C/W A3P125 132 0.2 21.1 16.5 14.9 °C/W A3P250 132 0.1 21.0 16.4 14.8 °C/W Very Thin Quad Flat Pack (VQFP) All devices 100 10.0 35.3 29.4 27.1 °C/W Thin Quad Flat Pack (TQFP) All devices 144 11.0 33.5 28.0 25.7 °C/W Plastic Quad Flat Pack (PQFP) All devices 208 8.0 26.1 22.5 20.8 °C/W PQFP with embedded heatspreader All devices 208 3.8 16.2 13.3 11.9 °C/W Fine Pitch Ball Grid Array (FBGA) See note* 144 3.8 26.9 22.9 21.5 °C/W See note* 256 3.8 26.6 22.8 21.5 °C/W See note* 484 3.2 20.5 17.0 15.9 °C/W A3P1000 144 6.3 31.6 26.2 24.2 °C/W A3P1000 256 6.6 28.1 24.4 22.7 °C/W A3P1000 484 8.0 23.3 19.0 16.7 °C/W Note: *This information applies to all ProASIC3 devices except the A3P1000. Detailed device/package thermal information will be available in future revisions of the datasheet. |
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