Overview: PG001M PARALLEL-TO-SERIAL DATA CONVERTER
The PG001M CMOS IC converts parallel-data signals from a lowcost, 8-bit microprocessor or microcontroller into a serial-data format compatible with the SLA7042M and SLA7044M power multi-chip modules to drive unipolar PWM, high-current stepper motors. The converter provides for five basic modes of operation: 1) normal, two-phase, full step (100% torque vector), 2) two-phase 'boosted' torque (141% torque vector), 3) half-step, constant torque operation (using a 2-1-2 output switching), 4) quarter-stepping utilizing ratioed currents for constant torque, and 5) microstepping (1/8th steps) for quiet, smooth, resonance-free motor performance. The PG001M is supplied in a low-cost 16-pin dual in-line plastic package. It is rated for continuous operation over the temperature range of -20°C to +85°C. Data Sheet 26112 RESET CLOCK IN CCW/CW NOT USABLE NOT USABLE MODE SELECT. .1 MODE . SELECT. 2 GROUND 1 2 V DD 16 15 CONTROL SUPPLY VECTOR CONTROL CLOCK OUT STROBE NO CONNECT. SERIAL DATA A SERIAL DATA B MONITOR PARALLEL-TO-SERIAL 3 4 5 6 7 8 CONTROL LOGIC 14 CONVERTER 13 12 11 10 9 Dwg. PK-009 ABSOLUTE MAXIMUM RATINGS Supply Voltage, VDD .................... 7.0 V Input Voltage Range, VI ................ -0.5 V to VDD + 0.5 V Input Current, II ....................... ±10 mA Output Voltage Range, VO ............... -0.5 V to VDD + 0.5 V Output Current, IO ................... ±15 mA Operating Temperature Range, TA .......................... -20°C to +85°C Storage Temperature Range, TS ........................ -40°C to +150°C
CAUTION: CMOS devices have input static protection but are susceptible to damage if exposed to extremely high static electrical charges.
