NCA9595PWJ

I/o Expanders Overview

The NCA9595PWJ is a low-voltage 16-bit I²C and SMBus I/O expander manufactured by Nexperia. It provides General Purpose Input/Output expansion for applications requiring additional IOs while minimizing interconnections. The device operates within a wide voltage range of 1.65 V to 5.5 V and features an open-drain interrupt output, configuration registers, and programmable pull-up resistors. It supports Fast-mode I²C bus communication up to 400 kHz and includes Schmitt-trigger inputs with noise filters. The component is housed in a TSSOP24 package (SOT355-1) and is specified for operation from -40 °C to +85 °C.

I/o Expanders Feature Summary

• Provides 16 bits of GPIO expansion via I²C/SMBus interface
• Features configurable internal pull-up resistors on all GPIO pins
• Includes an open-drain active LOW interrupt output triggered by input state changes
• Supports hardware-selectable slave addresses using three address pins

I/o Expanders Applications

• ACPI power switches
• Sensor interfaces
• Push button arrays
• LED control circuits
• Fan control systems

I/o Expanders Procurement Notes

Verify the complete part number including the suffix 'J' against official Nexperia documentation to confirm specific tape-and-reel packaging or variant details. Ensure the ordering information matches the required temperature range and package type. Cross-reference the datasheet revision date to confirm the most current electrical specifications are applied during design-in.

I/o Expanders Selection Notes

Select this component when a microcontroller requires expanded parallel I/O lines over a serial bus. It is suitable for designs needing configurable pull-ups to reduce external components. Consider the 1.65 V to 5.5 V operating range for compatibility with various logic levels. Verify that the 400 kHz clock speed meets system timing requirements.

I/o Expanders Part Context

The NCA9595 belongs to Nexperia's family of low-voltage I/O expanders designed for I²C and SMBus applications. These devices allow designers to add GPIO functionality without consuming additional microcontroller pins. The series typically includes variants with different pin counts and feature sets, offering flexible solutions for space-constrained embedded systems.

I/o Expanders Replacement Considerations

Check for direct pin-compatible alternatives within the Nexperia portfolio that offer similar register maps. Verify if other manufacturers provide functionally equivalent 16-bit I/O expanders with matching voltage ranges and interrupt capabilities.