PCAL6416AEXX

I/o Expanders Overview

The PCAL6416AEXX is a 16-bit I2C-bus/SMBus level translating I/O expander with interrupt, reset, and Agile I/O features in an X2QFN24 package. It operates within a power supply voltage range of 1.65 V to 5.5 V and supports a maximum clock frequency of 400 kHz. The device provides 16 I/O channels with a maximum output current of 25 mA and includes ESD protection rated at 2 kV. It functions across a temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Bidirectional voltage-level translation between I2C bus voltages (1.8 V, 2.5 V, 3.3 V, or 5 V) and port voltages (1.8 V, 2.5 V, 3.3 V, or 5 V).
• Agile I/O functionality allowing software configuration for backward compatibility with PCA6416A while enabling advanced interrupt management.
• Integrated active LOW reset input and open-drain active LOW interrupt output for efficient system control.

I/o Expanders Applications

• Adding remote I/O capabilities to microcontrollers in mixed-signal environments.
• Expanding GPIO interfaces for sensors, buttons, and keyboards in consumer electronics.
• Interface expansion in industrial building automation systems requiring low standby current.

I/o Expanders Procurement Notes

Verify the specific suffix 'XX' against official NXP documentation to confirm the exact package variant and tape-and-reel specifications. Ensure the ordering part number matches the required X2QFN24 form factor and check for any RoHS compliance details in the latest datasheet before procurement.

I/o Expanders Selection Notes

Select this component when bidirectional level shifting between varying logic voltages is required alongside standard I/O expansion. The X2QFN24 package is suitable for space-constrained designs. Confirm that the 400 kHz I2C speed and 25 mA drive capability meet the target application's electrical requirements.

I/o Expanders Part Context

The PCAL6416AEXX belongs to the PCAL6416A series, which serves as a pin-to-pin replacement for the PCA6416A with added Agile I/O features. This series is designed for seamless integration into systems using next-generation low-voltage microprocessors, offering enhanced flexibility in mixed-signal applications compared to its predecessors.

I/o Expanders Replacement Considerations

The PCAL6416APW (TSSOP24) and PCAL6416AEX1Z (X2QFN24) are confirmed functional equivalents within the same family. Verify package compatibility when substituting, as the core functionality remains identical across these variants.