KA2820D

www.fairchildsemi.com KA2820D Stepping Motor Driver Features Built-in power save function Low saturation voltage Low power dissipation Input level: TTL, LSTTL, 5V CMOS compatible www.DataSheet4U.com Standard MPU direct interface Built-in Thermal Shutdown(TSD) circuit Description The KA2820D is a monolithic integrated circuit, and suitable as a the two-phase stepping motor driver of a 5.25-inch FDD system. 20-SOP-375 Typical Application Floppy disk drive (FDD) General stepping motor Ordering Information Device KA2820D2 Package 20-SOP-375 Operating Temp. −20 ~ +75°C Rev. 1.0.2 May. 2000. ©2000 Fairchild Semiconductor International 1 KA2820D Pin Assignments 1 2 3 VCC 4 DIRA 5 GND 6 GND 7 DIRB 8 PS 13 BOUT 9 VS2B 10 NC 11 NC 12 VS1B 14 BOUT 16 17 AOUT GND 15 GND 20 19 18 AOUT NC VS2A NC VS1A KA2820D www.DataSheet4U.com Pin Definitions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pin Name NC VS2A VCC DIRA GND GND DIRB PS VS2B NC NC VS1B BOUT BOUT GND GND AOUT AOUT VS1A NC I/O I I I O O O O Pin Function Description 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 Ch...