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 f0.
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 = 25 C)
Recommended operating conditions (Ta = 25 C)