IS31IO7325-QFLS4-TR

Overview

The IS31IO7325-QFLS4-TR is a multi-function I/O driver featuring sixteen configurable ports, divided into eight push-pull and eight open-drain outputs. It operates on a 2-wire I2C serial interface with a maximum clock frequency of 400kHz. The device supports a supply voltage range from 2.4V to 5.5V and includes latching transition detection for input state changes via an active-low INTB output. It utilizes two address inputs (AD0, AD1) to select one of four slave addresses, which also determine the power-up logic states of the I/O ports.

Feature Summary

• Configurable I/O architecture with eight push-pull and eight open-drain ports capable of sinking up to 20mA per port.

Applications

• Cell phones
• Notebooks
• Servers

Procurement Notes

Verify the component against the official Lumissil Microsystems datasheet Rev. G dated September 5, 2025. Confirm that the QFN-24 package matches the required land pattern specifications. Ensure the ordering suffix corresponds to the standard industrial temperature range and reel quantity. Cross-reference the manufacturer part number to avoid counterfeit components.

Selection Notes

Select this component when a system requires sixteen general-purpose I/O lines accessible via a standard I2C bus. The open-drain outputs are suitable for driving external loads such as LEDs or interfacing with higher voltage domains through level translation. Verify that the available I2C address space accommodates the four selectable slave addresses defined by the AD0 and AD1 pins.

Part Context

This component belongs to the IS31IO7325 series manufactured by Lumissil Microsystems. It is designed as a peripheral expander for embedded systems requiring additional digital control lines. The device integrates internal pull-ups and protection diodes, simplifying circuit design for consumer electronics and automotive applications where reliable I/O expansion is necessary.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided source material.