PI4IOE5V9539ZDEX

I/o Expanders Overview

The PI4IOE5V9539ZDEX 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 from 2.3V to 5.5V, supports clock frequencies up to 400 kHz, and features 5V tolerant I/Os. It includes polarity inversion registers, noise filters on SCL/SDA inputs, and ESD protection rated at 4 kV HBM. The ZDEX suffix indicates the TQFN-24 package in tape and reel format.

I/o Expanders Feature Summary

• Provides 16 bits of GPIO expansion for I2C-bus/SMBus applications
• Features open-drain active LOW interrupt output triggered by input state changes
• Includes polarity inversion registers to modify input port data polarity
• Supports hardware reset via dedicated pin or power-on reset sequence

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 specific ordering suffix 'ZDEX' corresponds to the TQFN-24 package and tape/reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the selected variant matches the required lead-free specifications for the target assembly process.

I/o Expanders Selection Notes

Select this component when 16-bit I/O expansion is required over standard I2C or SMBus interfaces. Consider the 2.3V to 5.5V operating range for compatibility with various system voltages. Evaluate the TQFN-24 package constraints against available PCB space and thermal requirements compared to the TSSOP-24 alternative.

I/o Expanders Part Context

This part belongs to the PI4IOE5V9539 series of I/O expanders. The base model is available in TSSOP-24 and TQFN-24 packages. The 'ZD' designation identifies the TQFN form factor, while the 'E' suffix denotes lead-free and green material composition. The 'X' suffix specifies tape and reel delivery.

I/o Expanders Replacement Considerations

The PI4IOE5V9539LE serves as a functional equivalent in the TSSOP-24 package. Verify register mapping and electrical characteristics before substitution.