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117590 st mcu products are offered for sale by suppliers on Alibaba.com, of which other ics accounts for 76%, microcontrollers and processors, fpga accounts for 17%, and evaluation boards accounts for 1%. A wide variety of st mcu options are available to you, such as standard, 1k x 8 and 2k x 8.You can also choose from 32-bit, 8-bit and 16-bit st mcu,as well as from tray, bga, and qfp st mcu, and whether st mcu is ddr2, ddr, or sdr.