Fairchild Semiconductor Corp. (See On Semiconductor)Fairchild Semiconductor has released the FODM452 and FOD-M453 high-speed transistor optocouplers for line-receiver, output interface to CMOS-LSTTL-TTL, pulse transformer replacement and wide bandwidth analog coupling applications. The company says that coplanar construction and a proprietary shielding method on the silicon photodetector result in a common mode noise rejection that is 30% better, and that a five-pin, mini-flat housing reduces package volume by 35%, compared with similar devices. 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