STK672-442BN-E

Overview

The STK672-442BN-E is a thick-film hybrid integrated circuit designed as a unipolar, 2-phase stepper motor driver with PWM current control. It features built-in overcurrent and overheat detection functions that trigger an active low fault signal. The device includes a power-on reset function and supports Schmitt inputs for 2.5V high-level logic. Motor current is adjustable via two external resistors in conjunction with a built-in 0.089Ω detection resistor. The enable pin allows output current cutoff while maintaining excitation mode.

Feature Summary

• Built-in overcurrent and overheat detection with active low fault signaling
• PWM current control for precise motor drive management
• Schmitt input support compatible with 2.5V high-level logic signals
• External resistor-adjustable motor current setting capability

Applications

• Office photocopiers
• Printers
• X-Y plotters

Procurement Notes

Verify the specific suffix BN-E against manufacturer documentation to confirm pinout compatibility and thermal characteristics. Ensure supply voltages match the absolute maximum ratings defined in the official datasheet. Confirm that the replacement part number is explicitly listed as a direct substitute by onsemi or Sanyo Semicon Device to avoid functional mismatches in stepper motor control circuits.

Selection Notes

Select this component when a unipolar 2-phase stepper driver with integrated protection is required. The built-in fault detection simplifies system safety design. Verify that the application environment stays within the specified operating temperature range. Check that the external resistor values align with the desired motor current settings using the internal 0.089Ω reference.

Part Context

This part belongs to the STK672 series of thick-film hybrid ICs originally developed by Sanyo and later acquired by onsemi. These drivers are engineered for compact, reliable stepper motor control in office automation equipment. The series typically offers various output current capabilities and package options to suit different mechanical constraints and power requirements.

Replacement Considerations

The STK672-732AN-E is documented as having compatible pins with the STK672-740AN-E family. Verify if the STK672-442BN-E shares pin compatibility with other STK672 variants through official substitution guides before swapping.