NCA9535BY-Q100HP

I/o Expanders Overview

The NCA9535BY-Q100HP is a low-voltage 16-bit I²C and SMBus low-power I/O expander with interrupt output and configuration registers. It provides General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications, designed for a wide voltage range of 1.65 V to 5.5 V. The device contains input, output, configuration, and polarity inversion registers. At power up, all IOs default to inputs. Each IO can be configured as either input or output by changing the corresponding bit in the configuration register. The data for each input or output is stored in the corresponding input or output register. The polarity inversion register can be programmed to invert the polarity of the input register. The NCA9535-Q100 has an open-drain interrupt output which is activated when any one of the GPIO changes from its corresponding input port register state. The power on reset sets the registers to default values and initializes the device state machine. The NCA9535-Q100 has three address pins A0, A1 and A2 which can be used to configure the I²C bus slave address of the device. It allows up-to eight devices to share the same I²C-bus/SMBus.

I/o Expanders Feature Summary

• Automotive product qualification in accordance with AEC-Q100 (Grade 1)
• Specified from -40 °C to +125 °C
• I²C-bus to parallel port expander
• Operating power supply voltage range of 1.65 V to 5.5 V

I/o Expanders Applications

• ACPI power switches
• Sensors
• Push buttons
• LEDs
• Fan control

I/o Expanders Procurement Notes

Verify the exact ordering suffix 'BY' corresponds to the HWQFN24 package type SOT8041-1. Confirm the 'HP' suffix matches the specific reel or tape packaging variant required for your assembly line. Cross-reference the full part number NCA9535BY-Q100HP against the manufacturer's current production status to ensure availability and compliance with RoHS directives.

I/o Expanders Selection Notes

Select this component when automotive-grade reliability (AEC-Q100 Grade 1) is mandatory. Ensure the system operates within the 1.65 V to 5.5 V supply range. Verify that the HWQFN24 package dimensions fit the PCB footprint. Check if the 400 kHz Fast-mode I²C speed meets the communication requirements. Consider the low standby current consumption for battery-powered applications.

I/o Expanders Part Context

The NCA9535BY-Q100HP belongs to the Nexperia NCA95xx series of GPIO expanders. This series offers elegant solutions for additional IOs while minimizing interconnections. The NCA9535 variant specifically provides 16 bits of expansion with interrupt capabilities. It is part of the broader interface IC portfolio designed for reducing BOM cost and simplifying PCB layout in complex electronic systems.

I/o Expanders Replacement Considerations

NCA9535PW-Q100J (TSSOP24 package)