KA2820D2

FDD PRODUCTS KA2820D2 STEPPING MOTOR DRIVER The KA2820D2 is a monolithic integrated circuit, and suitable as a the two-phase stepping motor driver of a 5.25” FDD system. 20-SOP-375 FEATURES Built-in www.DataSheet4U.com power save function Low saturation voltage Low power dissipation Input level: TTL, LSTTL, 5V CMOS compatible Standard MPU direct interface Built-in TSD circuit ORDERING INFORMATION Device KA2820D2 Package 20-SOP-375 Operating Temperature −20 ~ +75°C BLOCK DIAGRAM VS2A VS1A DIRA AOUT VCC GND TTL Interface AOUT GND TSD VS2B VS1B DIRB BOUT TTL Interface PS BOUT GND Rev. B MIC-98D002 August 1998 © 1999 Fairchild Semiconductor Corporation 1 KA2820D2 FDD PRODUCTS PIN CONFIGURATION NC VS2A VCC 1 2 3 4 20 19 18 NC VS1A AOUT 17 AOUT 16 GND 15 GND 14 BOUT 13 BOUT 12 11 VS1B NC DIRA 5 GND 6 GND 7 DIRB 8 PS 9 VS2B NC 10 KA2820D2 www.DataSheet4U.com PIN DESCRIPION Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol NC VS2A VCC DIRA GND GND DIRB PS VS2B NC NC VS1B BOUT BOUT GND GND AOUT AOUT VS1A NC No connection A-channel holding supply voltage Logic part supply voltage A-channel direction input Signal ground Signal ground B-channel direction input Power save input B-channel holding supply voltage No connection No connection B-channel seeking supply voltage B-channel output B-channel inverting output Power ground Power ground A-channel inverting output A-channel output A-channel seeking supply voltage No connection D...