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EM357-RTR データシート(PDF) 227 Page - Silicon Laboratories

部品番号 EM357-RTR
部品情報  High-Performance, Integrated ZigBee/802.15.4 System-on-Chip
PDF  241 Pages
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メーカー  SILABS [Silicon Laboratories]
ホームページ  http://www.silabs.com
Logo SILABS - Silicon Laboratories

EM357-RTR データシート(HTML) 227 Page - Silicon Laboratories

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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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