MIC74YQS-TR

I/o Expanders Overview

The MIC74YQS-TR is a Microchip Technology I/O expander and fan speed controller housed in a 16-QSOP package. It supports I2C and SMBus interfaces with a clock frequency of 100 kHz. The device provides eight I/O lines with open-drain and push-pull output types, sourcing 7mA and sinking 10mA. It operates on a supply voltage of 2.7V to 3.6V within an industrial temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Integrated fan speed control functionality
• Dual-mode I2C and SMBus serial interface support
• Configurable interrupt output capability

I/o Expanders Applications

• Fan speed control systems
• I/O expansion for embedded devices
• SMBus-based monitoring applications

I/o Expanders Procurement Notes

Verify the part status as discontinued or obsolete through official Microchip channels before procurement planning. Confirm that the 16-QSOP package availability aligns with long-term supply requirements. Ensure compatibility with existing I2C/SMBus bus architectures and voltage levels. Review product change notifications for any assembly site or packing changes that may affect integration.

I/o Expanders Selection Notes

Select this component when an I/O expander with dedicated fan control features is required. Verify that the 2.7V to 3.6V supply range matches the system power design. Ensure the 100 kHz clock frequency meets communication timing constraints. Confirm that the 16-QSOP surface mount package fits the PCB layout constraints.

I/o Expanders Part Context

This part belongs to the MIC74 family of 2-wire serial I/O expanders and fan controllers. It was originally developed by Micrel before being acquired by Microchip Technology. The device integrates general-purpose I/O expansion with specialized thermal management capabilities, targeting compact electronic designs requiring efficient fan regulation.

I/o Expanders Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The MIC86xY/MIC74YQS series has been subject to obsolescence notices. Consult official Microchip resources for potential cross-reference options.