Overview
The STK672-540 is a hybrid IC for use as a unipolar, 2-phase stepping motor driver with PWM current control.

FEATUREs
• The motor speed can be controlled by the frequency of an external clock signal.
• 2-phase excitation or 1-2 phase excitation is selected according to switching
   the state of the MODE pin (low or high).
• The phase is maintained even if the excitation mode is switched in the middle of operation.
• The direction of rotation can be changed by applying a high or low signal to
   the CWB pin used to select the direction of rotation.
• Supports schmitt input for 2.5V high level input.
• Incorporating a current detection resistor (0.11Ω: resistor tolerance ±2%),
   motor current can be set using two external resistors.
• Equipped with an ENABLE pin that, during clock input, allows motor output to be cut-off
   and resumed later while maintaining the same excitation timing.
  
Applications
• Office photocopiers, printers, etc.