PCA9575HF,118

I/o Expanders Overview

The PCA9575HF,118 is a CMOS device providing 16-bit General Purpose parallel Input/Output (GPIO) expansion for low voltage processor and handheld battery powered mobile applications. It features separate supply rails allowing voltage level translation between 1.1 V and 3.6 V. The device operates with a 400 kHz I2C-bus serial interface and includes an active LOW reset input and open-drain interrupt output. It supports programmable bus hold and pull-up/pull-down features. The HWQFN24 package version is specified over the -40 °C to +105 °C temperature range.

I/o Expanders Feature Summary

• Separate supply rails for core logic and two I/O banks enable flexible voltage level shifting
• Programmable bus hold maintains valid logic levels when inputs are not actively driven
• Open-drain interrupt output monitors logic level changes on configured input pins
• GPIO All Call address allows simultaneous programming of multiple devices

I/o Expanders Applications

• Cell phones
• Media players
• Multi-voltage environments
• Battery operated mobile gadgets
• Motherboards

I/o Expanders Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature rating. Confirm that the HWQFN24 variant meets the thermal requirements for the target application environment. Ensure the I2C address configuration aligns with system constraints before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when independent voltage level translation between 1.1 V and 3.6 V is required for mixed signal environments. Choose the HWQFN24 package if higher operating temperatures up to 105 °C are necessary. Consider the 28-pin TSSOP variant if hardware-selectable addresses are needed to support more than four devices on a single bus.

I/o Expanders Part Context

The PCA9575 series enhances NXP's I2C-bus I/O expander family by offering lower standby current and smaller packaging compared to previous generations. The HF variant specifically utilizes the HWQFN24 package, which provides enhanced thermal performance suitable for industrial and high-temperature applications within the broader PCA9575 product line.

I/o Expanders Replacement Considerations

Direct pin-to-pin replacements include other packages within the PCA9575 family such as PCA9575PW1 or PCA9575PW2. Verify that the substitute package supports the required operating temperature range and address configuration needs.