MC3479PG

Overview

The MC3479PG is a stepper motor driver IC designed for bipolar mode operation. It features single supply operation from 7.2 to 16.5 V with 350 mA per coil drive capability. The device includes clamp diodes for back-EMF suppression and offers selectable CW/CCW and full/half step modes. Inputs are TTL/CMOS compatible with minimum 400 mV hysteresis. Phase logic can be initialized to Phase A, which provides an open-collector output indication.

Feature Summary

• Integrated clamp diodes for back-EMF suppression
• Selectable high/low output impedance in half-step mode
• TTL and CMOS compatible input logic levels
• Open-collector phase state indication output

Applications

• Bipolar stepper motor control systems
• Industrial automation positioning devices
• Consumer electronics requiring precise motion control

Procurement Notes

Verify the specific suffix PG indicates PDIP packaging before procurement. Confirm that the component status aligns with project lifecycle requirements as older driver ICs may have limited availability or end-of-life implications. Ensure voltage ranges match system power supplies.

Selection Notes

Select this component when bipolar stepper motor control is required with integrated protection features. The fixed 350 mA coil current limits suitability for larger motors. Consider the single-supply constraint and verify that the 7.2 V minimum operating voltage is compatible with the system's power architecture.

Part Context

This part belongs to onsemi's standard product line of discrete and power modules. It serves as a dedicated solution for stepper motor applications within industrial and consumer markets. The MC3479 series provides a cost-effective alternative to discrete driver implementations by integrating sequencing and protection functions.

Replacement Considerations

Public confirmed substitutes include M54640P, SAA1042, L6219, TEF3718, NJM37770, L6219R, and PBL3717A. Verify pinout compatibility and electrical specifications before substitution.

FAQ

What is the maximum coil drive current?

The MC3479PG supports a drive capability of 350 mA per coil.

Does the device support half-step operation?

Yes, it offers selectable full and half-step operation modes.