NTE7082 Integrated Circuit Stepper Motor Driver Description: The NTE7082 is a bipolar integrated circuit in a 16–Lead DIP type package intended for driving a four– phase two–state motor. The circuit consists of a bidirectional four–state counter and a code converter to drive the four outputs in the sequence required for driving a stepping motor. Features: D High Noise Immunity Inputs D Clockwise and Counter–Clockwise Operation D Reset Facility D High Output Current D Outputs Protected Against Damage by Overshoot Applications: D Automotive Industry D Industrial D Office Equipment D EDP Absolute Maximum Ratings: DC Supply Voltage, VCC1, VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Input Voltage (All Inputs), VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Current into Pin4, IRX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120mA Output Current, IOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C DC Electrical Characteristics: (VCC = 9.5V to 18V, VEE = 0V, TA = –20° to +70°C unless otherwise specified) Parameter Symbol Supply Voltage Range VCC Supply Current ICC Test Conditions VCC1 = 12V, unloaded, all outputs HIGH, Pin4 Open Min Typ Max Unit 8.5 – 18.0 V 2.0 4.5 6.5 mA DC Electrical Characteristics (Cont’d): Parameter (VCC = 9.5V to 18V, VEE = 0V, TA = –20° to +70°C unless otherwise specified) Symbol Test Conditions Min Typ Max Unit Count, Mode, and Reset Inputs (Pin15, Pin3, and Pin2) HIGH Input Voltage VIH 7.5 – – V LOW Input Voltage VIL – – 4.5 V HIGH Input Current IIH – 1 – µA LOW Input Current IIL – 30 – µA 3.0 – 4.5 V IOL = 350mA – 500 1000 mV IOL = 500mA – 700 – mV – – 500 mA – – 50 µA External Resistor (Pin4) Voltage at External Resistor VCC = 12V ±15%, R4 = 130Ω ±5% VRX Output 1, Output 2, Output 3, and Output 4 (Pin6, Pin8, Pin9, and Pin11) LOW Output Voltage VOL LOW Output Current IOL HIGH Output Current IOH VO = 18V Mode Input Table: With the Mode Input (Pin3) the sequence of output signals, and hence the direction of rotation of the stepping motor, can be chosen as shown below: Counting Sequence Mode = LOW Mode = HIGH Output 1 Output 2 Output 3 Output 4 Output 1 Output 2 Output 3 Output 4 0 L H L H L H L H 1 H L L H L H H L 2 H L H L H L H L 3 L H H L H L L H 0 L H L H L H L H Pin Connection Diagram N.C. 1 16 N.C. Reset Input 2 15 Count Input Mode Input 3 14 +VCC1 External Resistor 4 13 +VCC2 GND 5 12 GND Output 1 6 11 Output 4 N.C. 7 10 N.C. Output 2 8 9 Output 3 16 9 1 8 .870 (22.0) Max .260 (6.6) Max .200 (5.08) Max .100 (2.54) .700 (17.78) .099 (2.5) Min