NTE1857

NTE1857 Integrated Circuit Stepper Motor Driver Description: The NTE1857 is designed to drive a two–phase stepper motor in the bipolar mode, The circuit of four input sections, a logic decoding/sequencing section, two driver–stages for the motor coils, and an output to indicate the Phase A drive state. Input Truth Table: Features: D Single Supply Operation: +7.2V to +16.5V Input Low Input High D 350mA/Coil Drive Capability CW/CCW CW CCW D Clamp Diodes Provided for Back–EMF Full/Half Step Full Step Half Step Suppression D Selectable CW/CCW and Full/Half Step OIC Hi Z Low Z Operation Clk Positive Edge Triggered D Selectable High/Low Output Impedance (Half Step Mode) D TTL/CMOS Compatible Inputs D Input Hysteresis: 400mV Min D Phase Logic Can Be Initialized to Phase A D Phase A Output Drive State Indication (Open–Collector) Absolute Maximum Ratings: (Note 1) Supply Voltage, VM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18V Clamp Diode Cathode Voltage (Pin1), VD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VM +5.0V Driver Output Voltage (Pins 2, 3, 14, 15), VOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VM +6.0V Driver Output Current/Coil, IOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±500mA Input Voltage (Pins 7, 8, 9, 10), Vin . . . . . . . . . . . . . . . . . . . . ....