NTE NTE7082 Datasheet

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), V
Current into Pin4, I
Output Current, I

RX

OL

Operating Ambient Temperature Range, T
Storage Temperature Range, T

I

120mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

500mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

stg

–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DC Electrical Characteristics: (VCC = 9.5V to 18V, VEE = 0V, TA = –20° to +70°C unless

otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Supply Voltage Range V
Supply Current I

CC

CC

VCC1 = 12V, unloaded,
all outputs HIGH, Pin4 Open

8.5 – 18.0 V

2.0 4.5 6.5 mA

18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DC Electrical Characteristics (Cont’d): (VCC = 9.5V to 18V, VEE = 0V, TA = –20° to +70°C

unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Count, Mode, and Reset Inputs (Pin15, Pin3, and Pin2)

HIGH Input Voltage V
LOW Input Voltage V
HIGH Input Current I
LOW Input Current I

IH

IL

IH

IL

7.5 – – V

– – 4.5 V
– 1 – µA
– 30 – µA

External Resistor (Pin4)
Voltage at External Resistor V

RX

VCC = 12V ±15%, R4 = 130Ω ±5% 3.0 – 4.5 V
Output 1, Output 2, Output 3, and Output 4 (Pin6, Pin8, Pin9, and Pin11)
LOW Output Voltage V

OL

IOL = 350mA – 500 1000 mV

IOL = 500mA – 700 – mV
LOW Output Current I
HIGH Output Current I

OL

OH

VO = 18V – – 50 µA

– – 500 mA

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

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

Mode = LOW Mode = HIGH

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.

Reset Input

Mode Input

External Resistor

1
2

3
4
5GND
6Output 1
7N.C.
8Output 2

16

N.C.

15

Count Input

+VCC1

14
13

+VCC2

12 GND
11 Output 4

N.C.

10

Output 3

9