PCA9554BS3,118

I/o Expanders Overview

The PCA9554BS3,118 is an 8-bit I2C-bus and SMBus I/O expander from NXP Semiconductors. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features 8 configurable I/O pins that default to inputs upon power-on reset. It includes an active LOW open-drain interrupt output, polarity inversion registers, and noise filters on SCL/SDA inputs. Packaged in a 16-terminal HVQFN16 (SOT758-1) with dimensions of 3 x 3 x 0.85 mm, it is designed for surface mount applications across an ambient temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 8 bits of general-purpose parallel input/output expansion via I2C-bus/SMBus interface
• Features an active LOW open-drain interrupt output triggered by input state changes
• Includes polarity inversion register for flexible logic level handling
• Integrates noise filters on serial data lines and internal power-on reset

I/o Expanders Applications

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

I/o Expanders Procurement Notes

Verify the specific ordering suffix '118' corresponds to the reel packing method and standard marking requirements as defined in the official NXP datasheet. Confirm the package variant matches the SOT758-1 specification for the 3x3mm body size. Ensure compatibility with existing I2C bus addresses before integration.

I/o Expanders Selection Notes

Select this component when space-constrained designs require an 8-bit I/O expander in a compact HVQFN package. It is suitable for systems needing 5V tolerant I/Os and low standby current. Consider the fixed I2C address associated with the base model when designing multi-device buses.

I/o Expanders Part Context

This part belongs to the PCA9554 family, which enhances previous NXP I/O expanders with higher drive capability and smaller packaging. The 'BS3' designation specifically identifies the HVQFN16 package with a 3x3mm body size, distinct from the larger 4x4mm HVQFN or other leaded packages like SO16 or TSSOP16.

I/o Expanders Replacement Considerations

PCA9554ABS3,118 serves as a direct functional substitute with a different fixed I2C address configuration.