PCAL6416AERJ

I/o Expanders Overview

The PCAL6416AERJ is a 16-bit I2C-bus/SMBus level translating I/O expander with interrupt, reset, and Agile I/O features in a 24-UFBGA (2x2) package. 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 provides 16 I/O channels with open-drain or push-pull output types, capable of sourcing or sinking up to 25 mA per pin. It includes an active LOW reset input and an open-drain active LOW interrupt output. The component 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-configurable pull-up/pull-down resistors and polarity inversion for each I/O pin.
• Active LOW reset input and open-drain active LOW interrupt output for efficient status monitoring without continuous polling.

I/o Expanders Applications

• Panel-mounted controllers requiring remote I/O expansion.
• Distributed control systems managing machine processes.
• Arduino-compatible evaluation platforms for GPIO testing.

I/o Expanders Procurement Notes

Verify the specific ordering suffix ERJ against current NXP documentation to confirm the 24-UFBGA package and lead-free status. Check for End-of-Life (EOL) notifications, as this variant was marked EOL in September 2016. Confirm availability through authorized distributors or secondary markets, as standard factory stocking may be discontinued.

I/o Expanders Selection Notes

Select this component when a low-profile 24-pin UFBGA package is required for space-constrained designs. Ensure compatibility with I2C buses operating at Fast-mode speeds up to 400 kHz. Verify that the system voltage levels align with the bidirectional translation capabilities. Consider alternative packages like TSSOP24 if surface-mount footprint constraints allow, due to potential availability differences.

I/o Expanders Part Context

The PCAL6416A series serves as a pin-to-pin replacement for the PCA6416A, adding Agile I/O features. It belongs to NXP's portfolio of low-voltage I2C GPIO expanders designed for mixed-signal environments. The ERJ suffix specifically denotes the 24-UFBGA (2x2 mm) package variant, distinct from TSSOP24 or X2QFN24 options.

I/o Expanders Replacement Considerations

PCAL6416APW (TSSOP24) and PCAL6416AEX1Z (X2QFN24) are pin-compatible alternatives within the same family. For direct substitution, verify package dimensions and thermal characteristics differ. No other functional equivalents are confirmed in public data.