PCA9554CBSHP

I/o Expanders Overview

The PCA9554CBSHP is a low-voltage 8-bit General Purpose Input/Output (GPIO) expander with interrupt and weak pull-up resistors for I2C-bus/SMBus applications. It operates within a supply voltage range of 1.65 V to 5.5 V, featuring Schmitt-trigger inputs for noise immunity and 5 V tolerant I/Os. The device includes an open-drain active LOW interrupt output and supports 400 kHz Fast-mode I2C communication. It provides latched outputs with a maximum drive capability of 25 mA per pin. The component is housed in a 16-HVQFN package and functions across a temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• I2C-bus to parallel port expander
• Open-drain active LOW interrupt output
• Internal power-on reset
• Weak pull-up resistors on all I/Os

I/o Expanders Applications

• ACPI power switches
• Sensors
• Push buttons
• LEDs
• Fan control

I/o Expanders Procurement Notes

Verify the specific suffix HP indicates HVQFN16 packaging when ordering. Confirm the CBS designation corresponds to the PCA9554C fixed address variant to ensure correct I2C addressing compatibility. Check RoHS compliance status against current regulatory requirements before finalizing procurement specifications.

I/o Expanders Selection Notes

Select this model over the PCA9554BBSHP if the system requires the specific I2C base address assigned to the PCA9554C series. Ensure the application utilizes the 1.65 V to 5.5 V operating range effectively. Verify that the 25 mA sink capability meets the load requirements for connected peripherals like LEDs or relays without external buffering.

I/o Expanders Part Context

This component belongs to the PCA9554 family of I/O expanders developed by NXP Semiconductors. It serves as a pin-to-pin replacement for legacy industry-standard parts while offering enhanced features such as lower standby current and smaller packaging options compared to older generations.

I/o Expanders Replacement Considerations

PCA9554BBSHP serves as the alternative variant within the same package type but utilizes a different fixed I2C base address. Both variants share identical electrical characteristics and register sets, differing only in their hardware-selectable slave addresses.