PCA6416APW,118

I/o Expanders Overview

The PCA6416APW,118 is a 16-bit I2C-bus/SMBus I/O expander with interrupt and reset functionality in a TSSOP24 package. It provides remote I/O expansion for microcontrollers via the I2C interface. The device supports bidirectional voltage-level translation between VDD(I2C-bus) and VDD(P), allowing operation from 1.65 V to 5.5 V. It features an open-drain active LOW interrupt output (INT), an active LOW reset input (RESET), and latched outputs with 25 mA drive capability. The maximum clock frequency is 400 kHz, and it operates within a temperature range of -40 °C to +85 °C.

I/o Expanders Feature Summary

• Bidirectional voltage-level translation between I2C bus and Port P
• Open-drain interrupt output for state change notification
• Active LOW reset input for system initialization
• Latched outputs with high sink current capability

I/o Expanders Applications

• Battery-powered mobile applications requiring sensor interfacing
• Keypad and push button matrix scanning
• Mixed-signal environments with incompatible I/O voltages

I/o Expanders Procurement Notes

Verify the component matches the specified TSSOP24 package and NXP Semiconductors manufacturer. Confirm the ordering suffix indicates the standard reel packing method. Ensure the part number corresponds to the Rev. 2 product data sheet specifications for accurate electrical characteristics and pinout compatibility.

I/o Expanders Selection Notes

Select this component when dual power rails are required for voltage translation between low-voltage microprocessors and higher-voltage peripherals. Consider the 16-bit capacity and I2C interface constraints. Verify that the operating voltage range covers both the master side and port side requirements. Check if the interrupt and reset features align with the system design needs.

I/o Expanders Part Context

The PCA6416A belongs to NXP's family of low-voltage translating I/O expanders. It is designed to simplify interconnections in systems where additional GPIOs are needed without increasing pin count on the main processor. The device addresses the need for flexible communication between different voltage domains in embedded designs.

I/o Expanders Replacement Considerations

PCAL6416A is a pin-to-pin replacement offering Agile I/O features while maintaining software backward compatibility.