PCAL6524EVJ

I/o Expanders Overview

The PCAL6524EVJ is a 24-bit general-purpose I/O expander from NXP Semiconductors, packaged in VFBGA36. It provides remote I/O expansion via the Fast-mode Plus (Fm+) I2C-bus interface, supporting speeds up to 1 MHz. The device features ultra-low-voltage translation, allowing direct connection to microcontrollers operating down to 0.8 V on the SDA/SCL lines while interfacing with peripherals at 1.65 V to 5.5 V on Port P. Key specifications include an operating power supply range of 0.8 V to 3.6 V for the I2C bus and 1.65 V to 5.5 V for the port side. It offers Agile I/O features such as programmable output drive strength, latchable inputs, and interrupt masking.

I/o Expanders Feature Summary

• Built-in bidirectional voltage level translation between low-voltage controllers and higher-voltage peripherals
• Agile I/O capabilities including programmable output drive strength, input latching, and configurable pull-up/pull-down resistors
• Hardware switch debounce and individual interrupt clear functionality without disturbing other events
• Active LOW reset input and open-drain active LOW interrupt output

I/o Expanders Applications

• Battery-powered mobile applications requiring additional I/Os with minimal interconnections
• Interfacing sensors, push buttons, and keypads to microcontrollers
• Mixed power supply systems requiring communication between incompatible I/O voltages

I/o Expanders Procurement Notes

Verify the specific ordering suffix 'J' corresponds to the VFBGA36 package and reel packing method as defined in the official NXP ordering information tables. Confirm that the component meets the required temperature range of -40 °C to +85 °C for your application environment. Ensure compatibility with the host system's I2C bus voltage levels before integration.

I/o Expanders Selection Notes

Select this component when a 24-bit GPIO expansion is needed alongside voltage translation capabilities. It is suitable for designs where the main processor operates at lower voltages (down to 0.8 V) than the peripheral devices. Consider the VFBGA36 package constraints regarding PCB layout and soldering requirements during the design phase.

I/o Expanders Part Context

The PCAL6524EVJ belongs to the PCAL6524 series of I/O expanders. It shares functional characteristics with other variants like the PCAL6524HEHP but differs in packaging. The EVJ designation specifically identifies the VFBGA36 plastic very fine-pitch ball grid array package version of the chip.

I/o Expanders Replacement Considerations

PCAL6524HEHP is a confirmed substitute part number within the same family, offering identical electrical functionality in a HUQFN32 package.