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BH6627FS Datasheet Read /write Amplifier For Fdd

Manufacturer: ROHM

Overview: Magnetic disk ICs Read / Write amplifier for FDD BH6627FS The BH6627FS is a 4-mode read / zwrite IC designed for floppy disk drives. This IC has an internal active filter that can be set to any of multiple settings according to transfer rate, and internal switches for density and inner track / outer track. Write current can be set to any of multiple settings. FApplications Floppy disk drives (1MB, 1.

Datasheet Details

Part number BH6627FS
Manufacturer ROHM
File Size 272.64 KB
Description Read /Write amplifier for FDD
Datasheet BH6627FS_Rohm.pdf

General Description

s BH6627FS 537 Magnetic disk ICs BH6627FS 538 Magnetic disk ICs BH6627FS 539 Magnetic disk ICs BH6627FS 540 Magnetic disk ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5V) BH6627FS 541 Magnetic disk ICs BH6627FS 542 Magnetic disk ICs BH6627FS 543 Magnetic disk ICs FRead characteristics BH6627FS Total filter peak frequency setting f0 = a / (RRCC [kΩ] +0.09) [kHz] FILC “H” a = 313 330 376 387 675 844 765 748 “L” 313 330 376 387 627 765 706 754 250 [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 = 758 500 [kbps] : T = 683 500 [kbps] : T = 333 RRCC [kΩ] +604 [ns] RRCC [kΩ] +434 [ns] RRCC [kΩ] +388 [ns] FWrite current switching ratio Write current setting Iwr = 24.0 RWCC [kΩ] [mA] 544 Magnetic disk ICs FFilter characteristic BH6627FS 545 Magnetic disk ICs FMeasurement circuit BH6627FS FCircuit operation (1) Read The inpu

Key Features

  • 1) Internal active filter with four settings that can be selected for multiple Q and f0. 2) Time domain filter with internal switch set 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 (Ta = 25_C) FRecommended operating conditions 535 Magnetic disk ICs FBlock diagram BH6627FS 536 Magnetic disk ICs FPin.

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BH6627FS Distributor