PCAL6408AEXX

I/o Expanders Overview

The PCAL6408AEXX is an 8-bit general-purpose I/O expander designed for remote expansion via the I2C-bus interface. It features bidirectional voltage-level translation between a VDD(I2C-bus) supply of 1.65 V to 5.5 V and a Port P supply (VDD(P)) of 1.8 V to 5 V. The device supports Fast-mode communication at up to 400 kHz and includes an active LOW reset input, an open-drain interrupt output, and configurable pull-up/pull-down resistors. It operates within a temperature range of -40 °C to +85 °C and is housed in an XFBGA16 package.

I/o Expanders Feature Summary

• Bidirectional voltage level translation between I2C bus and port supplies
• Agile I/O with programmable drive strength and input latching
• Interrupt generation with maskable status identification
• Internal pull-up/pull-down resistor configuration

I/o Expanders Applications

• Battery-powered mobile applications requiring sensor or keypad interfacing
• Mixed-signal environments necessitating processor-to-peripheral voltage translation
• Systems requiring GPIO expansion while minimizing interconnections

I/o Expanders Procurement Notes

Verify that the ordering suffix matches the specific package variant required, as the XFBGA16 package has been discontinued for new designs. Confirm the work week indicated by the 'X' rotation in the part number corresponds to the desired production batch. Ensure compatibility with the target PCB footprint for the XFBGA16 land grid array.

I/o Expanders Selection Notes

Select this component when pin-to-pin replacement for the PCA6408A is needed with enhanced Agile I/O capabilities. Ensure the design accommodates the two separate power rails, VDD(I2C-bus) and VDD(P), to support the required voltage translation levels. Verify that the system can handle the default masked interrupts upon power-up.

I/o Expanders Part Context

This part belongs to the PCAL6408A series of low-voltage translating I/O expanders. It serves as a software-compatible successor to the PCA6408A, offering additional configuration registers for drive strength and input latching. The EXX designation specifically identifies the XFBGA16 package version, which is distinct from HVQFN16 or TSSOP16 variants.

I/o Expanders Replacement Considerations

PCAL6408ABSHP is a direct pin-to-pin replacement in the HVQFN16 package.