MC3479 Datasheet, PDF (1/10 Pages) ON Semiconductor – Stepper Motor Driver

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Stepper Motor Driver
The MC3479 is designed to drive a two–phase stepper motor in the
bipolar mode. The circuit consists of four input sections, a logic
decoding/sequencing section, two driver–stages for the motor coils, and an
output to indicate the Phase A drive state.
• Single Supply Operation: 7.2 to 16.5 V
• 350 mA/Coil Drive Capability
• Clamp Diodes Provided for Back–EMF Suppression
• Selectable CW/CCW and Full/Half Step Operation
• Selectable High/Low Output Impedance (Half Step Mode)
• TTL/CMOS Compatible Inputs
• Input Hysteresis: 400 mV Minimum
• Phase Logic Can Be Initialized to Phase A
• Phase A Output Drive State Indication (Open–Collector)
• Available in Standard DIP and Surface Mount
MC3479
STEPPER MOTOR
DRIVER
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 648C
Figure 1. Representative Block Diagram
VM
Clk
Clock
L1
Driver
L2
CW/CCW
CW/CCW
Logic
VD
L3
Full/Half
Step
F/H Step
Driver
L4
OIC
OIC
Phase A
Bias/Set
Gnd
Device
MC3479P
ORDERING INFORMATION
Operating
Temperature Range
TA = 0° to +70°C
Package
Plastic
PIN CONNECTIONS
VD 1
L2 2
L1 3
4
Gnd
5
Bias/Set 6
Clk 7
OIC 8
16 VM
15 L3
14 L4
13
Gnd
12
11 Phase A
10 CW/CCW
9 Full/Half
Step
(Top View)
3 2 1 20 19
Gnd 4
Gnd 5
Gnd 6
Gnd 7
Bias/Set 8
18 L4
17 Gnd
16 Gnd
15 Gnd
14 Gnd
9 10 11 12 13
INPUT TRUTH TABLE
Input Low Input High
CW/CCW
CW
CCW
Full/Half Step
Full Step
Half Step
OIC
Hi Z
Low Z
Clk
Positive Edge Triggered
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 1
1