MOTOR DRIVER L293 INTEGRATED CIRCUIT

L293d  having two h-bridge. it;s used in area of robotics to control robot.in h bridge it's used simple concept of switch using transistor .for eg ,it's used as  going in off or on state hence there is transistor used so it is used in clockwise or anticlockwise  direction .thus l293 act  as  current amplifier  as  they sink low current  and  source  high current.this high current used to drive   motor  that connected to ic 

 this motor driver having two inbult h =bridge .motor can be controlled by the input pin shown in diagram        as 2&7 and 10&15  .if  we given 00 or same  logic means 11 to input it will stop the corresponding  motor and if we provide 01 and 10   then motor rotate in clockwise and counter clockwise  respectively .

pin no 1 and 9  are  enable pin to start operation .both are  active high pin so whenever   these  pin are  high corresponding motor will be   active  and  whenevr it disbled then it's going in high impedance   here   we shown in fig rotation concept .
here circuit   to provide increase current capacity to motor