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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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DS31256 数据表(PDF) 178 Page - Maxim Integrated Products |
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DS31256 数据表(HTML) 178 Page - Maxim Integrated Products |
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178 / 183 page  DS31256 256-Channel, High-Throughput HDLC Controller 178 of 183 16. THERMAL CHARACTERISTICS Table 16-A. Thermal Properties, Natural Convection PARAMETER CONDITIONS MIN TYP MAX UNITS Ambient Temperature (Note 1) 0 +70°C °C Junction Temperature 0 +125°C °C Theta-JA ( qJA), Still Air (Note 2) 15.4 °C/W Psi-JB ( YJB), Still Air 7.03 °C/W Psi-JT ( YJT), Still Air 0.07 °C/W Note 1: The package is mounted on a four-layer JEDEC standard test board with no airflow and dissipating maximum power. Note 2: Theta-JA ( qJA) is the junction-to-ambient thermal resistance, when the package is mounted on a four-layer JEDEC standard test board with no airflow and dissipating maximum power. Table 16-B. Thermal Properties vs. Airflow FORCED AIR (m/s) THETA-JA ( qJA) Psi-JB ( YJB) Psi-JT ( YJT) 0 15.4 °C/W 7.03 °C/W 0.07 °C/W 1 13.0 °C/W 6.77 °C/W 0.40 °C/W 2.5 11.9 °C/W 6.53 °C/W 0.57 °C/W Figure 16-1. 27mm x 27mm PBGA with 256 Balls, 2oz Planes, +70 °C Ambient, Under Natural Convection at 3.0W |
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