PCAL6524HEAZ

I/o Expanders Overview

The PCAL6524HEAZ is a 24-bit general-purpose I/O expander providing remote expansion via the Fast-mode Plus (Fm+) I²C-bus interface. It supports bidirectional voltage-level translation between an interface supply of 0.8 V to 3.6 V and port supplies of 1.8 V, 2.5 V, 3.3 V, or 5.5 V. The device operates at speeds up to 1 MHz with low standby current consumption of 2.0 μA typical at 3.3 V VDD(P). It features Agile I/O capabilities including programmable drive strength, latchable inputs, and interrupt masking. The component is housed in a HUQFN32 package.

I/o Expanders Feature Summary

• Built-in level shifting for mixed power supply systems
• Agile I/O features with programmable output drive strength
• Open-drain active LOW interrupt output with individual clear capability
• Hardware switch debounce implementation

I/o Expanders Applications

• Battery-powered mobile applications
• Interfacing to sensors and push buttons
• Keypad connections
• Mixed voltage microcontroller systems

I/o Expanders Procurement Notes

Verify the specific ordering suffix HEAZ against the manufacturer's official documentation to confirm the packaging format and marking details. Ensure that the procurement channel provides valid traceability and authenticity certificates. Confirm that the component status matches the required production lifecycle stage before finalizing orders.

I/o Expanders Selection Notes

Select this component when interfacing low-voltage processors down to 0.8 V with peripherals operating at higher voltages up to 5.5 V. Consider the HUQFN32 package constraints and the requirement for separate VDD(I2C-bus) and VDD(P) power supplies. Evaluate the need for Agile I/O features such as input latching and programmable pull-up/pull-down resistors for the specific application design.

I/o Expanders Part Context

The PCAL6524 series includes variants like PCAL6524HEHP and PCAL6524EVJ. The HEAZ variant specifically denotes the HUQFN32 package type. Other packages include VFBGA36. All variants share the same core functionality but differ in physical footprint and packing methods as defined in the manufacturer's ordering information tables.

I/o Expanders Replacement Considerations

PCAL6524HEAZ serves as a direct replacement for PCAL6524HEHP within the same HUQFN32 package family. Verify compatibility regarding the specific packing method differences between standard reel sizes.