When installing an integrated circuit on a printed circuit board, pay attention to the direction of no mistake, otherwise, when the power IC is likely to be burned. General rule is: IC pin up to the gap or hit a point or vertical lines prevail, press counterclockwise arrangement. "." If a separate plug-in IC straight hand, places the front (printed side models trademark) toward yourself, pin down, pin numbering sequence is generally left to right. In addition to these conventional pin direction arrangement, there are also some more special arrangement pin direction, should attract attention, most of them belong to the single in-line package, which coincides with the pin arrangement direction opposite to the above said, the suffix "R "such as M5115 and M5115RP, HA1339A and A1339AR, HA1366W and HA1366AR etc., that model or trademark printed side towards yourself, pin down, the suffix" R "pinout direction is from right to left, This is mainly because some two-channel audio power amplifier circuit, when connected BTL amplifier circuit, arranged symmetrically convenient printing plates, and special design. HCF4013MO13TR IC Product rating industry standard B1 level: non-original packaging or no packaging Jiangsu Intersil agents, unused, may be re-packaged vendor (Note: the original production, but for some reason did not packaged, unified product lot number for the original unity marking. into the market through special channels in Jiangsu Intersil electronic product quality and reliability uncertain). B2 level: non-original packaging or no packaging, unused, may be re-packaged vendor (Note: the original production, but for some reason did not print the word on the product surface, product quality and reliability of such uncertainty in general types of products will be re-unified marking the dealer). B3 level: non-original packaging or no packaging, unused, may be re-packaged vendor (Note: the original production, but for some reason did not package Jiangsu Intersil vendor, product lot number is not uniform, as Original unified marking. into the market through special channels, product quality and reliability uncertain. In general this type of product will be re-unified marking the dealer). B4 Class: Unused, packaged (Note: the original production, but the product is not suitable storage environment, or product stored too long pin oxidation products of uncertain quality.). Intersil MC78M12CDTRKG Nanjing, Jiangsu Intersil manufacturers, 耀坤 Technology (certified merchants) provided by Nanjing 耀坤 Technology Limited. Nanjing Yaokun Ltd. (www.njykkj.com) is specialized in the "IC, FET, relays, power supply module" of the enterprise, the company of "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Yang Kun.