MC3479FN Datasheet, PDF (1/10 Pages) ON Semiconductor – Stepper Motor Driver

MC3479
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.
Features
• 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)
• Pb−Free Package is Available*
V_M
Clk
Clock
L1
Driver
L2
CW/CCW
CW/CCW
Logic
V_D
L3
Full/Half
Step
F/H Step
Driver
L4
OIC
OIC
Phase A
Bias/Set
GND
Figure 1. Representative Block Diagram
ORDERING INFORMATION
Device
Operating
Temperature Range
MC3479P
MC3479PG
T_A = 0° to +70°C
Package
PDIP−16
PDIP−16
(Pb−Free)
Shipping
25 Units / Rail
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 7
http://onsemi.com
PDIP−16
P SUFFIX
CASE 648C
MARKING DIAGRAM
16
MC3479P
AWLYYWWG
1
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
V_D 1
L2 2
L1 3
4
GND
5
Bias/Set 6
Clk 7
OIC 8
(Top View)
16 V_M
15 L3
14 L4
13
GND
12
11 Phase A
10 CW/CCW
9 Full/Half
Step
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
Publication Order Number:
MC3479/D