STK672-400C-E

Overview

The STK672-400C-E is a hybrid IC designed for unipolar, two-phase stepping motor drivers with PWM current control. It supports microstep sinusoidal driving via external clock input and allows selection of excitation modes including full, half, and wave drive configurations through external pins. The device integrates a phase holding function to prevent step loss during mode switching and includes internal noise filtering on the CLK input. Motor current is regulated using an external resistor connected to the Vref pin, while the ENABLE pin controls drive current output without altering the excitation state.

Feature Summary

• Supports microstep operation with selectable excitation modes
• Integrates phase holding function to maintain position during mode transitions
• Includes internal noise filtering and Schmitt trigger on clock input

Applications

• Office photocopiers
• Printers
• X-Y plotters

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package type and pinout alignment before integration. Ensure supply chain sources provide valid traceability documentation. Validate that the specific suffix matches the required electrical characteristics for the target application design.

Selection Notes

Select this component when designing systems requiring precise microstep control for two-phase stepper motors. It is suitable for applications needing robust noise immunity in office automation equipment. Consider the external resistor requirements for current setting and ensure adequate thermal management for the SIP-22 package.

Part Context

This part belongs to the STK672 series of thick-film hybrid integrated circuits originally developed by Sanyo Semicon Device and later acquired by onsemi. These components are specialized motor drivers intended for high-reliability industrial and commercial motion control applications where compact size and integrated protection features are critical.

Replacement Considerations

Public confirmed substitute part numbers: STK672-040-E, STK672-740AN-E.