DC Electrical Characteristics (Cont’d):

(Specifications apply over the recommended supply

voltage and temperature ranges unless otherwise spe–

cified, See Notes 2, 3)

Parameter

Pins

Symbol

Test Conditions

Min

Typ

Max

Unit

Phase A Output

Output Low Voltage

11

–

–

0.4

V

Off State Leakage Current

–

–

100

µA

Power Supply

Power Supply Current

16

µ

–

–

70

mA

L1 = V

,

L3 = HiZ, L4 = HiZ

–

–

40

mA

–

–

75

mA

Bias/Set Current

To Set Phase A

6

–5.0

–

–

µA

Note 2. Algebraic convention rather than absolute values is used to designate limit values.

Note 3. Current into a pin is designated as positive. Current out of a pin is designated as negative.

Parameter

Pins

Symbol

Test Conditions

Min

Typ

Max

Unit

Clock Frequency

7

0

–

50

kHz

Clock Pulse Width – High

7

10

–

–

µs

Clock Pulse Width – Low

7

10

–

–

µs

Bias/Set Pulse Width

6

10

–

–

µs

Setup Time – CW/CCW and F/HS

10–7, 9–7

5

–

–

µs

Hold Time – CW/CCW and F/HS

10–7, 9–7

10

–

–

µs

Propagation Delay – Clk–to–Driver Output

–

8

–

µs

Propagation Delay – Bias/Set–to–Driver Output

–

1

–

µs

Propagation Delay – Clk–to–Phase A Low

7–11

–

12

–

µs

Propagation Delay – Clk–to–Phase A High

7–11

–

5

–

µs

Pin Description:

Name

Symbol

Pin #

Description

Power Supply

16

Power supply pin for both the logic circuit and the motor coil current. Volt-

age is +7.2 to +16.5V.

Ground

GND

4, 5,

12, 13

Ground pins for the logic circuit and the motor coil current. The physical

configuration of the pins aids in dissipating heat from within the IC pack-

age.

Clamp Diode

Voltage

1

This pin is used to protect the outputs where large voltage spikes may oc-

cur as the motor coils are switched. Typically a diode is connected be-

tween this pin and Pin16.

Driver Outputs

L1, L2,

L3, L4

2, 3,

14, 15

High current outputs for the motor coils. L1 and L2 are connected to one

coil, and L3 and L4 to the other coil.

Bias/Set

B/S

6

resistor to GND) determines the maximum output sink current. If the pin

while the internal logic presets to a Phase A condition.

Clock

Clk

7

The positive edge of the clock input switches the outputs to the next posi-

tion. This input has no effect if Pin6 is open.