L297

The L297/A/D Stepper Motor Controller IC gener- ates four phase drive signals for two phase bipolar and four phase unipolar step motors in microcom-puter-controlled applications. The motor can be driven in half step, normal and wawe drive modes and on-chip PWM chopper circuits permit switch- mode control of the current in the windings. A

feature of this device is that it requires only clock,direction and mode input signals.Since the phase are generated internally the burden on the micro- processor,and theprogrammer, is greatlyreduced. Mounted in DIP20 and SO20 packages, the L297 can be used with
monolithic bridge drives such as the L298N or L293E, or with discrete transistors and darlingtons.