Details
Stepper driver IC, package: DIP16
SN754410 (with internal clamping diodes).
Very easy to mount it in 3 minutes if you want to control stepper motor, or other 4 independent output channels, max +-1A load each ( this can drive to + or -, unlike the TPIC6A259DW that can only switch towards ground )
Note: assembled controller is equipped with this by default