General description

The NCA9535-Q100 provides 16 bits of General Purpose Input/Output (GPIO) expansion for

I²C-bus/SMBus applications. It is designed for a wide voltage range of 1.65 V to 5.5 V with

interrupt. Nexperia GPIO expanders provide an elegant solution when additional IOs are needed

while keeping the interconnections to a minimum, for example, in ACPI power switches, sensors,

push buttons, LEDs and fan control. The NCA9535-Q100 contains a set of 8 bit 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.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100

(Grade 1) and is suitable for use in automotive applications.

Features and benefits

• 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

• Low standby current consumption:

• 4 μA (maximum)

• Schmitt-trigger action allows slow input transition and better switching noise immunity at the

SCL and SDA inputs

• Vhys = 0.10 × VCC (typical)

• Noise filter on SCL and SDA inputs

• 5 V tolerant I/Os

• 16 I/O pins which power up configured in input state

• Open-drain active LOW interrupt output (INT)

• 400 kHz Fast-mode I²C-bus

• Internal power-on reset

• No glitch on power-up

• Latched outputs with 25 mA drive maximum capability for directly driving LEDs

• Latch-up performance exceeds 100 mA per JESD78, Class II

• ESD protection:

• HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 2000 V

• CDM ANSI/ESDA/JEDEC JS-002 Class C3 exceeds 1000 V

• Package offered: TSSOP24