XD297 DIP20 / XL297 SOP20 this device is that it requires only clock, direction NORMAL/WAVE DRIVE and mode input signals. Since the phase are gen- HALF/FULL STEP MODES erated internally the burden on the microprocessor, CLOCKWISE/ANTICLOCKWISE DIRECTION and the programmer, is greatly reduced. Mounted in DIP20 and SO20 packages, the XD297 can be SWITCHMODE LOAD CURRENT REGULA- used with monolithic bridge drives such as the TION ZX298 or XD293, or with discrete transistors and PROGRAMMABLE LOAD CURRENT darlingtons. FEW EXTERNAL COMPONENTS RESET INPUT & HOME OUTPUT ENABLE INPUT DESCRIPTION The XD297 Stepper Motor Controller IC generates four phase drive signals for two phase bipolar and four phase unipolar step motors in microcomputer- 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 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Supply voltage 10 V s V Input signals 7V i P 1W Total power dissipation (T = 70C) tot amb T , T Storage and junction temperature -40 to + 150 stg j C TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT XD297 XZ298 1 XD297 DIP / XL297 SOP20 (Top view) PIN CONNECTION XD297 XL297 BLOCK DIAGRAM (XD297 - XL297) XD297 2