CS8442

Supply Voltage (V_CC) (continuous) -40 to +105 .....................-0.5 to 24V
(100ms pulse transient) -40to +105 ......................................-0.5 to 60V
Input Voltage (V_IN) ............................................................-0.3 to VCC +0.3V
Storage Temperature Range (T_STG).......................................-65 to +150
Junction Temperature.............................................................-40 to +150
Speed Sensor Output ................................................................................7V
ESD (Human Body Model) .........................................................................2kV
Lead Temperature Soldering
    Wave Solder (through hole styles only)...............10 sec. max, 260¡C peak

The CS8442 is a stepper motor driver that implements an Hbridge design to drive two coils in an eight step sequence each revolution. Each H-bridge is capable of delivering 85mA to the load.

CS8442 sequencer function insures that the odometer is monotonic and that cross-conduction of each H bridges does not occur. Before the beginning of each sequence, both bridges are turned off. This "dead zone" minimizes the fly back energy generated in the inductive loads. In addition, on board clamp diodes across each output protect the output drive transistors from excessive fly back voltages.

The CS8442 is fault protected against reverse battery, short circuit, and over voltage conditions. If a fault is detected, the IC shuts down.

The buffered speed signal output (SENSOR OUT) is an open collector NPN capable of driving a 4.7k   load connected to a 5V supply. The signal is a buffered, inverted version of the speed sensor input voltage (SENSOR IN). CS8442 input voltage can be either a sine or square wave form.