PI4IOE5V9554LEX

I/o Expanders Overview

The PI4IOE5V9554ALEX is an 8-bit I2C-bus and SMBus general-purpose input/output (GPIO) 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 features five-volt tolerant I/Os, an active low interrupt output, and polarity inversion capabilities. It is housed in a TSSOP-16 package with three hardware address pins allowing multiple devices on the same bus.

I/o Expanders Feature Summary

• Provides eight bits of GPIO expansion for I2C-bus and SMBus applications
• Features five-volt tolerant inputs and outputs for mixed-voltage systems
• Includes an open-drain interrupt output activated by input state changes
• Supports polarity inversion and individual I/O configuration via registers

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 against official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and lead-free definitions prior to procurement. Ensure the selected variant matches the required fixed I2C bus address for system integration.

I/o Expanders Selection Notes

Select the PI4IOE5V9554ALEX when eight digital I/O lines are required over an I2C interface. Choose this component for designs needing 5V tolerance on input pins while operating at lower core voltages. Verify that the TSSOP-16 package dimensions fit the available PCB footprint constraints.

I/o Expanders Part Context

This part belongs to the PI4IOE5 series of I/O expanders from Diodes Incorporated. The 'A' designation indicates a distinct fixed I2C bus address compared to the standard version, enabling up to sixteen devices on a single bus when mixing variants. The 'LEX' suffix denotes the TSSOP-16 package and tape/reel packaging format.

I/o Expanders Replacement Considerations

PCA9654EDTR2G is listed as a similar replacement option.