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数据搜索系统，热门电子元器件搜索 |
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EM357-RTR 数据表(PDF) 227 Page - Silicon Laboratories |
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EM357-RTR 数据表(HTML) 227 Page - Silicon Laboratories |
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227 / 241 page  Rev 1.3 227 21. Top Marking Figure 21.1 shows the part marking for the EM35x Series. The circle in the top corner indicates Pin 1. Pins are numbered counter-clockwise from Pin 1 with 12 pins per package edge. Figure 21.1. Part Marking for EM35x Table 21.1. 48-Pin QFN Top Marking Explanation Mark Method: Laser Pin 1 Marking: Circle = 0.40 mm Diameter (Top-Left Justified) Line 1 Marking: Logo and Device Part Number Right Justified Half circle logo. EM35x is the orderable part num- ber variant (EM357/EM351). Line 2 Marking: TTTTTT = Mfg Code YY=Year WW-Work Week Manufacturing Code from the Assembly Purchase form. Assigned by the Assembly House. Corre- sponds to the year and work week. Right Justified Line 3 Marking: Circle = 1.3 mm Diameter Center Justified Country of Origin ISO abbreviation Right Justified “e3” indicates Sn solder finish. TW Line 4 Marking: ARM Right Justified ARM right justified with underline. |
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