PCA9554BS,118

I/o Expanders Overview

The PCA9554BS,118 is an 8-bit I/O expander designed for I2C-bus and SMBus applications. It provides General Purpose parallel Input/Output (GPIO) expansion using a 16-pin HVQFN package with dimensions of 4 x 4 x 0.85 mm. The device operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. It features 5 V tolerant I/Os, an active LOW interrupt output, and low standby current. The chip includes internal power-on reset, noise filters on SCL/SDA inputs, and ESD protection exceeding 2000 V HBM.

I/o Expanders Feature Summary

• Provides 8 bits of GPIO expansion via I2C/SMBus interface
• Features active LOW open-drain interrupt output for input state changes
• Includes polarity inversion register for flexible logic configuration
• Supports hardware selectable addresses allowing up to eight devices per bus

I/o Expanders Applications

• ACPI power switches
• Sensor interfaces
• Push button arrays
• LED drivers
• Fan control systems

I/o Expanders Procurement Notes

Verify the ordering suffix '118' corresponds to the specified reel packing method and standard marking requirements. Confirm the HVQFN16 package variant matches the 4 x 4 x 0.85 mm body dimensions. Ensure the fixed I2C address aligns with system design constraints before procurement.

I/o Expanders Selection Notes

Select this component when 8 additional bidirectional I/O pins are required on an I2C bus. It is suitable for designs needing 5 V tolerance on I/O lines while operating at lower core voltages. Consider the PCA9554A variant if a different fixed address base is needed to accommodate more than eight expanders on a single bus segment.

I/o Expanders Part Context

This part belongs to the PCA9554 family of CMOS I/O expanders developed to enhance previous NXP Semiconductors offerings. It improves upon earlier models by offering higher drive capability, lower supply current, and smaller packaging options like the HVQFN16. The device maintains pin-to-pin compatibility with the PCF8574 series but requires software adjustments due to enhanced register functionality.

I/o Expanders Replacement Considerations

PCA9554ABS,118 serves as the direct functional equivalent within the same package type.