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303 rs232 to ttl pcb products are offered for sale by suppliers on Alibaba.com, of which pcba accounts for 15%, other ics accounts for 5%, and other pcb & pcba accounts for 2%. A wide variety of rs232 to ttl pcb options are available to you, such as factory, odm and oem/odm.You can also choose from communication, oem electronic rs232 to ttl pcb,