NCA9555BY-Q100HP

I/o Expanders Overview

The NCA9555BY-Q100HP is a low-voltage 16-bit I²C and SMBus I/O expander designed for automotive applications. It provides General Purpose Input/Output (GPIO) expansion with interrupt output and configuration registers. The device operates within a supply voltage range of 1.65 V to 5.5 V and supports Fast-mode I²C bus communication up to 400 kHz. It features 16 I/O pins, an open-drain active LOW interrupt output, and 5 V tolerant inputs. The component is qualified to AEC-Q100 Grade 1 standards and functions across a temperature range of -40 °C to +125 °C. It utilizes a HWQFN24 package.

I/o Expanders Feature Summary

• Automotive qualification in accordance with AEC-Q100 Grade 1 standard
• Low standby current consumption with Schmitt-trigger action for noise immunity
• Open-drain active LOW interrupt output activated by GPIO state changes
• Latched outputs with high drive capability for direct LED driving

I/o Expanders Applications

• ACPI power switches
• Sensors and push buttons
• LED indicators and fan control
• Automotive systems including ADAS, VCU, DCU, and BCM

I/o Expanders Procurement Notes

Verify the specific ordering suffix HP corresponds to the HWQFN24 package variant when sourcing. Confirm that the Q100 designation indicates compliance with the Automotive Electronics Council Grade 1 qualification requirements. Ensure the selected distributor provides documentation matching the Rev 3.1 product data sheet specifications.

I/o Expanders Selection Notes

Select this component when designing systems requiring 16-bit GPIO expansion via I²C or SMBus interfaces. It is suitable for environments demanding operation from -40 °C to +125 °C. Use this part where 5 V tolerance on I/Os is necessary alongside lower logic supply voltages. Consider the HWQFN24 package constraints regarding thermal pad soldering for optimal performance.

I/o Expanders Part Context

This component belongs to the Nexperia NCA9555-Q100 series of low-voltage I/O expanders. The BY suffix identifies the HWQFN24 plastic thermal enhanced very thin Quad Flat package without leads. The Q100 suffix denotes automotive grade qualification. This series offers a solution for expanding microcontroller I/O resources while minimizing interconnections in complex electronic designs.

I/o Expanders Replacement Considerations

NCA9555PW-Q100J is a pin-compatible alternative utilizing a TSSOP24 package.