NTE1857 Datasheet | NTE Electronics

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 350m A/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 patible Inputs D Input Hysteresis: 400m V 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 - - - - - - - - - - . ±500m A Input Voltage (Pins 7, 8, 9, 10), Vin - - - - - - - - . . - 0.5 to +7.0V Bias/Set Current (Pin6), IBS - - - - - - - - - - - - 10m A Phase A Output Voltage (Pin11), VOA - - - - - - - - - . . . +18V Phase A Sink Current (Pin11), IOA - - -...