DESCRIPTION
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 microprocessor, and the programmer, is greatly reduced. ABSOLUTE MAXIMUM RATINGS
Symbol Vs Vi Ptot Tstg, Tj Parameter Supply voltage Input signals Total power dissipation (Tamb = 70°C) Storage and junction temperature TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT Value Unit 10 V 7 V 1 W -40 to + 150 °C December 2001 1/11 L297 PIN CONNECTION (Top view) L297/1 L297D BLOCK DIAGRAM (L297/1 - L297D) 2/11 PIN FUNCTIONS - L297/1 - L297D N° NAME 1 SYNC 2 GND 3 HOME 4 A 5 INH1 6 B 7 C 8 INH2 9 D 10 ENABLE 11 CONTROL 12 Vs 13 SENS2 14 SENS1 15 Vref 16 OSC 17 CW/CCW 18 CLOCK L297 FUNCTION Output of the on-chip chopper oscillator. The SYNC connections The SYNC connections of all L297s to be synchronized are connected together and the oscillator components are omitted on all but one. If an external clock source is used it is injected at this terminal.
STMicroelectronics
