MC3479

Pinout




Specifications

Rating	Symbol	Value	Unit
Supply Voltage	VM	+ 18	Vdc
Clamp Diode Cathode Voltage (Pin 1)	VD	VM + 5.0	Vdc
Driver Output Voltage	VOD	VM + 6.0	Vdc
Drive Output Current/Coil	IOD	± 500	mA
Input Voltage (Logic Controls)	Vin	0.5 to + 7.0	Vdc
Bias/Set Current	IBS	10	mA
Phase A Output Voltage	VOA	+ 18	Vdc
Phase A Sink Current	IOA	20	mA
Junction Temperature	TJ	+ 150	°C
Storage Temperature Range	Tstg	65 to + 150	°C

Description

The MC3479 is designed to drive a twophase stepper motor in the bipolar mode. The circuit consists of four input sections, a logic decoding/sequencing section, two driverstages 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 BackEMF 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 toPhase A
• Phase A Output Drive State Indication (OpenCollector)
• Available in Standard DIP and Surface Mount