PI4IOE5V9539LEX

I/o Expanders Overview

The PI4IOE5V9539LEX is a 16-bit I2C-bus and SMBus low power I/O port manufactured by Diodes Incorporated. It provides General Purpose parallel Input/Output (GPIO) expansion with an active LOW interrupt output and active LOW reset input. The device operates on a supply voltage ranging from 2.3V to 5.5V, supporting clock frequencies up to 400 kHz. It features 5V tolerant I/Os, polarity inversion registers, and noise filters on SCL/SDA inputs. The component is offered in a TSSOP-24 package for the 'LEX' suffix variant.

I/o Expanders Feature Summary

• Provides 16 bits of GPIO expansion via I2C/SMBus interface
• Features open-drain interrupt output triggered by input state changes
• Includes active LOW reset pin for hardware initialization
• Supports 5V tolerant I/Os with configurable polarity inversion

I/o Expanders Applications

• ACPI power switches
• Sensor interfaces
• Push button detection
• LED control circuits
• Fan speed monitoring

I/o Expanders Procurement Notes

Verify the ordering suffix 'LEX' corresponds to the Tape & Reel packaging format as specified in the manufacturer's documentation. Confirm that the specific revision level matches project requirements. Ensure compatibility with the target PCB footprint for the TSSOP-24 package before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when 16 bidirectional I/O lines are required over an I2C bus. Ensure the system voltage falls within the 2.3V to 5.5V operating range. Verify that the available address pins (A0, A1) allow for unique addressing if multiple devices share the same bus. Consider the TSSOP-24 package constraints for board space.

I/o Expanders Part Context

This part belongs to the PI4IOE5V95xx series of I/O expanders from Diodes Incorporated. It shares functional similarities with other models in the family but differs in pin count and package options. The 'LE' designation indicates Pb-free and Green manufacturing compliance, while 'X' specifies the reel packaging type.

I/o Expanders Replacement Considerations

Direct substitutes include PI4IOE5V9539LE (Tube packaging) and PI4IOE5V9539ZDEX (TQFN-24 Tape & Reel). These parts share identical electrical characteristics and register maps. Verify package dimensions and thermal requirements when switching between TSSOP and TQFN variants.