MIC5891YWM: An 8-Bit Serial Input Shift Register and Power Driver for Robust System Control

The MIC5891YWM is a highly integrated, high-voltage, high-current power driver that combines an 8-bit serial-input shift register with a latched power driver output stage. This monolithic device is engineered to significantly simplify system design by reducing component count and board space, making it an ideal solution for driving a wide array of inductive or resistive loads such as solenoids, relays, stepper motors, and high-power LEDs.

A primary advantage of the MIC5891YWM is its serial input interface, which allows for easy daisy-chaining of multiple devices. This feature enables control of a large number of outputs using only a few microcontroller GPIO pins—specifically, data, clock, and latch enable signals. This drastically simplifies wiring and firmware control in complex systems. The integrated open-collector Darlington transistor outputs are capable of sinking up to 500mA per channel and can withstand load voltages up to 50V. This robust output stage is designed to handle the high inrush currents associated with inductive loads, providing reliable switching and long-term system durability.

Furthermore, the device includes internal clamp diodes for transient voltage suppression, which protects the IC from voltage spikes generated when de-energizing inductive coils. This built-in protection enhances system reliability and further minimizes the need for external components. The MIC5891YWM operates over a wide supply voltage range and is offered in a compact 24-pin SOIC wide-body package, suitable for industrial and automotive environments where space and reliability are paramount.

ICGOOODFIND: The MIC5891YWM stands out as a powerful and efficient solution for system designers seeking to simplify the control of multiple high-power outputs. Its combination of a serial shift register, high-current drive capability, and integrated protection features makes it an exceptionally versatile and reliable choice for a broad spectrum of industrial and commercial applications.

Keywords: Shift Register, Power Driver, High-Current, Serial Interface, Darlington Outputs