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KA2821D Datasheet(PDF) 6 Page - Fairchild Semiconductor

Part No. KA2821D
Description  The KA2821D is a monolithic integrated circuit, and suit able as a two-phase stepping motor driver of a 3.5-inch FDD system
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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KA2821D Datasheet(HTML) 6 Page - Fairchild Semiconductor

   
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KA2821D
6
Application Information
1. MOTOR CONTROL LOGIC
Mode selection-truth table
Notes:
DIRY: DIRA or DIRB (Direction input)
YOUT: AOUT or BOUT (Non-inverting output)
YOUT: AOUT or BOUT (Inverting output)
Y: Indicate each channel (A and B)
X: High impedance
2. MAXIMUM CURRENT DRIVE CAPACITY
• Peak seeking output current: 0.5A
• Continuous seeking output current: 0.33A
• Holding output current: 0.2A
Input
Output
Operating Mode
CE
DIRY
YOUT
YOUT
L
L
L
H
Seeking Mode
LH
H
L
H
L
X
X
Open Mode
HH
X
X


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