DC Electrical Characteristics (Cont’d):

unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

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

HIGH Input Voltage

7.5

–

–

V

LOW Input Voltage

–

–

4.5

V

HIGH Input Current

–

1

–

µA

LOW Input Current

–

30

–

µA

External Resistor (Pin4)

Voltage at External Resistor

3.0

–

4.5

V

Output 1, Output 2, Output 3, and Output 4 (Pin6, Pin8, Pin9, and Pin11)

LOW Output Voltage

–

500

1000

mV

–

700

–

mV

LOW Output Current

–

–

500

mA

HIGH Output Current

–

–

50

µA

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:

Mode = LOW

Mode = HIGH

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

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

Reset Input

N.C.

Output 3

1

2

3

4

N.C.

Mode Input

External Resistor

5

GND

6

Output 1

7

N.C.

8

Output 2

16

15

14

13

N.C.

Count Input

10

9