PCA9539APW,118

I/o Expanders Overview

The PCA9539APW,118 is a low-voltage 16-bit General Purpose Input/Output (GPIO) expander designed for I2C-bus and SMBus applications. It features an operating power supply voltage range of 1.65 V to 5.5 V and supports Fast-mode communication up to 400 kHz. The device includes active LOW reset and open-drain interrupt outputs, with latched outputs capable of 25 mA sink current. It operates within a temperature range of -40 °C to +85 °C and is housed in a TSSOP24 package.

I/o Expanders Feature Summary

• Pin and function compatible with the standard PCA9539
• Provides hardware selectable slave addresses via A0 and A1 pins
• Includes Schmitt-trigger action on SCL and SDA inputs for noise immunity
• Features internal power-on reset and active LOW external reset input

I/o Expanders Applications

• ACPI power switches
• Sensor interface modules
• Push button arrays
• LED control circuits
• Fan control systems

I/o Expanders Procurement Notes

Verify the specific ordering suffix matches the required tape and reel packaging configuration. Confirm that the component type aligns with the intended system requirements before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when a direct pin-to-pin replacement for the PCA9539 is required without additional Agile I/O features. Ensure the design accommodates the 1.65 V to 5.5 V supply range and utilizes the available 16-bit I/O capacity.

I/o Expanders Part Context

This part belongs to the PCA9539A series of low-voltage I/O expanders manufactured by NXP Semiconductors. It serves as a foundational solution for expanding microcontroller I/O capabilities over serial buses while maintaining minimal interconnections.

I/o Expanders Replacement Considerations

The PCAL9539A is a pin-to-pin replacement offering enhanced Agile I/O features such as programmable drive strength and latchable inputs.