Description
The M54640P is a semiconductor IC to drive a stepper motor by the bipolar method.

FEATUREs
• Bipolar and constant-current drive
• Wide current control rage (20 – 800mA)
• Wide supply voltage drive range (10 – 40V)
• Built in flywheel diodes
• Current level can be changed by steps or continuously.
• Built in a thermal shutdown circuit

APPLICATION
  Printer, FDD, HDD, Fax