PI4IOE5V9535LEX

I/o Expanders Overview

The PI4IOE5V9535LEX is a 16-bit I2C-bus and SMBus I/O port expander manufactured by Diodes Incorporated. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies from 0 Hz to 400 kHz. The device provides 16 general-purpose I/O pins, which are individually configurable as inputs or outputs via configuration registers. It features an active LOW open-drain interrupt output that triggers when input states change. The component includes polarity inversion registers for logic level adjustment and incorporates noise filters on SCL and SDA inputs. It offers ESD protection rated at 4 kV HBM and 1 kV CDM, with a maximum power dissipation of 200 mW.

I/o Expanders Feature Summary

• Provides 16 bits of GPIO expansion compatible with I2C-bus and SMBus protocols
• Features an active LOW open-drain interrupt output for state change notification
• Includes polarity inversion registers to adjust read register data polarity
• Offers 5V tolerant I/Os with integrated noise filters on serial communication lines

I/o Expanders Applications

• ACPI power switch control
• Sensor interface connections
• Push button scanning
• LED indicator management
• Fan speed control circuits

I/o Expanders Procurement Notes

Verify the specific ordering suffix 'LEX' corresponds to the TSSOP-24 package and tape/reel packaging format. Confirm RoHS compliance status and lead times directly with Diodes Incorporated or authorized distributors before finalizing procurement plans.

I/o Expanders Selection Notes

Select this component when 16 bidirectional I/O pins are required for I2C or SMBus systems. Ensure the design accommodates the 2.3 V to 5.5 V operating voltage range. Consider the TSSOP-24 package constraints if board space is limited. Verify that the application does not require internal pull-up resistors, as this variant lacks them compared to similar models.

I/o Expanders Part Context

This device belongs to the PI4IOE5V9535 series of I/O expanders. It is functionally identical to the PI4IOE5V9555, except it omits the internal I/O pull-up resistors to reduce power consumption when outputs are held low. Both devices share the same pinout and register map.

I/o Expanders Replacement Considerations

The PI4IOE5V9555 serves as a direct functional substitute, differing only by the inclusion of internal pull-up resistors. Other variants in the series may offer different package types such as TQFN-24.