Let's try another one. The AD prefix stands for ADI, the manufacturer, and 7490 is the device number. B represents temperature, which corresponds to 85°C in the table. RU is the package type, TSSOP, and Z indicates compliance with the ROHS directive. Reel is the packaging form, indicating that this is a 13-inch reel. Quantities may vary depending on the packaging size, and some may be marked with RL or R instead.
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