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549 Magnetic disk ICs Read / Write amplifier for FDD BH6628AFS The BH6628AFS is a 4-mode read / write IC designed for floppy disk drives and has an active filter that can be set accord- ing to transfer rate. Any of multiple write current settings can be selected, and inner track / outer track switching is done internally. Applications Floppy disk drives (1MB, 1.6MB and 2MB) Features 1) Internal active filter with multiple settings that can be selected for multiple Q and f 0. 2) Time domain filter that is internally switchable ac- cording to transfer rate. 3) Any of multiple write current settings can be selected, and inner track/outer track switching is done internal- ly. Absolute maximum ratings (Ta = 25C) Recommended operating conditions (Ta = 25C)