DESCRIPTION

· The NCA9555-Q100 is a 16-bit I²C/SMBus I/O expander with interrupt output and configuration registers.
· It operates at a voltage range of 1.65 V to 5.5 V and includes default pull-up resistors on GPIOs.
· The device is ideal for applications requiring additional I/Os with minimal interconnections, such as ACPI power switches, sensors, push buttons, LEDs, and fan control.
· It features 8-bit input, output, configuration, and polarity inversion registers, with all IOs defaulting to inputs at power-up.
· The open-drain interrupt output activates upon any GPIO state change.
· It supports up to eight devices on the same I²C-bus/SMBus via three address pins (A0, A1, A2).
· Qualified to AEC-Q100 (Grade 1), it is suitable for automotive applications.

FEATURES

· Automotive qualification per AEC-Q100 (Grade 1).
· Operating temperature range: -40 °C to +125 °C.
· Voltage range: 1.65 V to 5.5 V.
· Low standby current: 4.0 µA (max).
· Schmitt-trigger action for noise immunity.
· 5 V tolerant I/Os.
· 16 I/O pins with weak pull-up resistors.
· Open-drain interrupt output (INT).
· 400 kHz Fast-mode I²C-bus.
· Internal power-on reset.
· Latched outputs with 25 mA drive capability.
· ESD protection: HBM >2000 V, CDM >1000 V.

APPLICATIONS

· ACPI power switches.
· Sensors and push buttons.
· LED and fan control.
· Automotive electronics.