1. General description

The NCA9595-Q100 provides 16 bits of General Purpose Input/Output (GPIO) expansion for I²Cbus/

SMBus applications. It is designed for a wide voltage range of 1.65 V to 5.5 V with interrupt

and default pull-up resistors on GPIOs. 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 NCA9595-Q100 contains

a set of 8 bit input, output, configuration, polarity inversion and configuration pull-up 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 pull-up resistors can be disconnected by programming

configuration pull up registers. The NCA9595-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

NCA9595-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.

2. 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 with weak configurable pull-up resistors

• Open-drain active LOW interrupt output (INT)

• 400 kHz Fast-mode I²C-bus

• Internal power-on reset

• Configuration pull-up registers to disable pull up resistors on GPIOs

• 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