onsemi

STK672-442AN-E

STK672-442AN-E Description

The STK672-442AN-E from onsemi is a unipolar stepper motor driver IC designed for general-purpose applications. Housed in a 19-pin SIP (Single In-line Package), this obsolete but robust driver integrates Power MOSFET technology to deliver 3A output current per half-bridge, supporting 0V to 42V load voltage. It operates within a 4.75V to 5.25V supply range, ensuring stable performance in industrial and automation environments. The device features a parallel interface for straightforward control and offers five microstepping resolutions (1, 1/2, 1/4, 1/8, 1/16), enabling precise motor positioning. With an operating temperature range of 0°C to 105°C (TC) and MSL 1 (Unlimited) moisture sensitivity, it suits harsh conditions.

STK672-442AN-E Features

• High Current Output: Supports 3A per half-bridge, ideal for driving medium-power stepper motors.
• Flexible Microstepping: 1/16-step resolution for smooth motion control and reduced vibration.
• Wide Voltage Range: Compatible with 0V–42V load voltage, accommodating diverse motor types.
• Robust Construction: Through-hole mounting and REACH/ROHS3 compliance ensure reliability.
• Thermal Resilience: Operates up to 105°C (TC), suitable for high-temperature environments.
• Simplified Control: Parallel interface reduces system complexity compared to serial alternatives.

STK672-442AN-E Applications

This driver excels in applications requiring precision motion control, such as:

• Industrial Automation: CNC machines, robotic arms, and conveyor systems.
• Medical Equipment: Pump controls and imaging device positioning.
• Consumer Electronics: 3D printers, scanners, and automated cameras.
• Legacy Systems: Upgrading older designs due to its obsolete-but-reliable status.

Conclusion of STK672-442AN-E

The STK672-442AN-E balances power efficiency, microstepping precision, and thermal durability, making it a versatile choice for unipolar stepper motor control. While obsolete, its 3A output, wide voltage range, and easy integration ensure continued relevance in maintenance-heavy or cost-sensitive projects. Engineers seeking a no-frills, high-performance driver for legacy or general-purpose systems will find this IC a pragmatic solution.