PCA9574HR,115

I/o Expanders Overview

The PCA9574HR,115 is an 8-bit I2C-bus and SMBus GPIO expander featuring voltage level translation. It operates with a core supply (VDD) of 1.1 V to 3.6 V and a separate I/O bank supply (VDD(IO)) of 1.1 V to 3.6 V. The device supports a maximum clock frequency of 400 kHz and includes an open-drain interrupt output. It provides configurable pull-up or pull-down resistors and bus-hold functionality. The component is specified for industrial temperatures ranging from -40 °C to +85 °C.

I/o Expanders Feature Summary

• Dual supply rails enable voltage level translation between the core logic and I/O bank.
• Open-drain interrupt output monitors input pin state changes.
• Programmable bus-hold and pull-up/pull-down features maintain valid logic levels.
• Hardware reset pin initializes the device to default power-up states.

I/o Expanders Applications

• Cell phones
• Multi-voltage environments
• Battery operated mobile gadgets
• Industrial control systems

I/o Expanders Procurement Notes

Verify the specific ordering suffix '115' against official NXP documentation to confirm packaging details. Ensure the selected package variant matches the required PCB footprint and thermal management specifications for the target application environment.

I/o Expanders Selection Notes

Select this component when mixed-signal designs require interfacing low-voltage processors with higher-voltage peripherals. The dual-supply architecture allows independent voltage domains. Verify that the 400 kHz I2C speed meets system timing requirements and that the HVQFN16 package fits the available board space.

I/o Expanders Part Context

This part belongs to the PCA9574 family of I/O expanders designed for low-power applications. It enhances previous generations by offering lower operating voltages and integrated level shifting capabilities within a compact form factor suitable for portable electronics.

I/o Expanders Replacement Considerations

Direct replacements include other variants within the PCA9574 series such as PCA9574PW or PCA9574BS, provided they match the required package type and electrical characteristics.