PCAL6416AEX1Z

I/o Expanders Overview

The PCAL6416AEX1Z is a 16-bit I2C-bus/SMBus level translating I/O expander manufactured by NXP Semiconductors. It operates within a supply voltage range of 1.65 V to 5.5 V and supports a maximum clock frequency of 400 kHz. The device features an active LOW reset input, an open-drain active LOW interrupt output, and 25 mA drive capability for directly driving LEDs. It includes internal power-on reset, Schmitt trigger inputs, and noise filters on SCL/SDA lines. The component is housed in an X2QFN24 package with dimensions of 2.0 mm x 2.0 mm x 0.35 mm.

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 P voltages (1.8 V, 2.5 V, 3.3 V, or 5 V).
• Agile I/O features including programmable output drive strength, latchable inputs, and software-configurable pull-up/pull-down resistors.
• Interrupt functionality with maskable interrupts, interrupt status registers, and latched inputs to minimize host response time.

I/o Expanders Applications

• Battery-powered mobile applications requiring remote I/O expansion.
• Interfacing microcontrollers with sensors, push buttons, and keypads.
• Connecting processors running at one voltage level to peripherals operating at different voltage levels.

I/o Expanders Procurement Notes

Verify the specific ordering suffix 'X1Z' against the manufacturer's official documentation to confirm the exact packaging configuration and work week coding. Ensure compatibility with the required temperature range of -40 °C to +85 °C for your application environment.

I/o Expanders Selection Notes

Select this component when pin-to-pin compatibility with the PCA6416A is required alongside enhanced Agile I/O capabilities. Consider the X2QFN24 package size constraints and verify that the dual power rail requirements (VDD(I2C-bus) and VDD(P)) fit the system design.

I/o Expanders Part Context

The PCAL6416AEX1Z belongs to the PCAL6416A series of low-voltage translating I/O expanders. It serves as a pin-to-pin replacement for the PCA6416A but adds Agile I/O features such as programmable drive strength and input latching. The device simplifies mixed-signal environments by bridging incompatible I/O voltages via its built-in level shifting mechanism.

I/o Expanders Replacement Considerations

The PCAL6416A is a direct pin-to-pin replacement for the PCA6416A. When substituting, note that the PCAL6416A powers up with all I/O interrupts masked by default to prevent spurious interrupts during board bring-up.