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BH6625FS Datasheet Read / Write Amplifier For Fdd

Manufacturer: ROHM

Overview: Magnetic disk ICs Read / Write amplifier for FDD BH6625FS The BH6625FS is a 4-mode read / write IC designed for floppy disk drives, and has an active filter that can be set according to transfer rate. Any of multiple write current settings can be selected, and inner track / outer track switching is done internally. FApplications Floppy disk drives (1MB, 1.

Datasheet Details

Part number BH6625FS
Manufacturer ROHM
File Size 276.04 KB
Description Read / Write amplifier for FDD
Datasheet BH6625FS_Rohm.pdf

General Description

s and input / output circuits BH6625FS 510 Magnetic disk ICs BH6625FS 511 Magnetic disk ICs BH6625FS 512 Magnetic disk ICs BH6625FS 513 Magnetic disk ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5V) Supply current BH6625FS Low level voltage detection circuit Recovery time 514 Magnetic disk ICs Preamplifier BH6625FS Preamplifier / L.P.F / differentiator (B.P.F) 515 Magnetic disk ICs Write circuit BH6625FS Erase output Logic input 516 Magnetic disk ICs FRead characteristics BH6625FS Total filter peak frequency setting f0 = a / (RRCC [kΩ] +0.09) [kHz] FILC “H” a = 300 339 357 401 677 882 803 748 “OPEN” 353 380 420 451 646 836 702 754 “L” 290 339 345 401 629 732 732 z 250 [kbps] outer track 250 [kbps] inner track 300 [kbps] outer track 300 [kbps] inner track 500 [kbps] outer track (when F2 = H) 500 [kbps] inner track (when F2 = H) 500 [kbps] outer track (when F2 = L) 500 [kbps] inner track (when F2 = L) TDF time constant setting 250 [kbps] : T = 940 300 [kbps] : T = 745 500 [kbps] : T = 377 FWrite current switching ratio RRCC [kΩ] +590 [ns] RRCC [kΩ] +

Key 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 according to transfer rate. 3) Any of multiple write current settings can be selected, and inner track / outer track switching is done internally. FAbsolute maximum ratings (unless otherwise noted, Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 508 Magnetic disk ICs FBlock diagram BH6625FS 509 Magnetic disk ICs FPin.

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BH6625FS Distributor