PCA9575PW1,118

I/o Expanders Overview

The PCA9575PW1,118 is a CMOS device providing 16-bit General Purpose parallel Input/Output (GPIO) expansion. It operates with a core supply voltage of 1.1 V to 3.6 V and supports separate I/O bank supply rails within the same range for level translation. The component features a 400 kHz I2C-bus serial interface and includes an open-drain interrupt output pin. It utilizes a 24-pin TSSOP package and functions across an industrial temperature range of -40 °C to +85 °C.

I/o Expanders Feature Summary

• Separate supply rails for core logic and two I/O banks enable flexible voltage level shifting between 1.1 V and 3.6 V.
• Configurable I/O pins default to inputs at power-up, with independently programmable pull-up or pull-down resistors.
• Open-drain active LOW interrupt output allows monitoring of input state changes without continuous bus polling.
• Built-in bus-hold function maintains valid logic levels when inputs are not actively driven.

I/o Expanders Applications

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

I/o Expanders Procurement Notes

Verify the specific ordering suffix

I/o Expanders Selection Notes

Select this part when low voltage operation below 2.5 V is required alongside level translation capabilities. The 24-pin TSSOP package limits address configuration to a fixed target address; use the 28-pin variant if hardware-selectable addresses are needed.

I/o Expanders Part Context

This component belongs to the NXP PCA9575 family of I2C-bus and SMBus GPIO expanders. It serves as an enhancement over previous generations by offering lower operating voltages and reduced supply current while maintaining compatibility with standard I2C protocols.

I/o Expanders Replacement Considerations

PCA9575PW2,118 provides identical functionality in a 28-pin TSSOP package with additional address select pins.