PCA9574PW,118

I/o Expanders Overview

The PCA9574PW,118 is an 8-bit I2C-bus and SMBus GPIO expander featuring voltage level translation capabilities. It operates with a core supply (VDD) of 1.1 V to 3.6 V and a separate I/O bank supply (VDD(IO)) ranging from 1.1 V to 3.6 V. The device supports a maximum clock frequency of 400 kHz and draws less than 1 μA in standby mode. It includes an open-drain interrupt output, active LOW reset input, and configurable pull-up/pull-down resistors. The component is housed in a TSSOP16 package and functions within an industrial temperature range of -40 °C to +85 °C.

I/o Expanders Feature Summary

• Dual independent supply rails enable voltage level translation between the core logic and I/O bank.
• Configurable I/O pins default to inputs at power-up with programmable bus-hold or pull-up/pull-down features.
• Open-drain interrupt output monitors input state changes with masking capabilities.
• GPIO All Call address allows simultaneous programming of multiple devices.

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 '118' against the manufacturer's current documentation to confirm packaging details and compliance status. Ensure the procurement channel provides valid traceability for the NXP Semiconductors brand. Cross-reference the datasheet revision date to confirm technical specifications match the delivered units.

I/o Expanders Selection Notes

Select this component when mixed-signal environments require interfacing processors operating at different voltage levels. The dual supply architecture supports low-power applications requiring minimal standby current. Verify that the required I/O count matches the eight available ports and that the TSSOP16 package fits the PCB layout constraints.

I/o Expanders Part Context

This part belongs to the PCA9574 series of I/O expanders designed for low-voltage mobile and handheld applications. It enhances previous generations by offering lower supply currents and flexible voltage translation. The series supports both I2C and SMBus protocols, providing a standardized interface for system controllers managing peripheral expansion.

I/o Expanders Replacement Considerations

Check for direct substitutes within the PCA9574 family, such as the PCA9574BS variant which utilizes an HVQFN16 package. Ensure any replacement maintains the same 1.1 V to 3.6 V operating voltage range and I2C compatibility.