NCA9535BY

NCA9535BY is a low-voltage 16bit I²C and SMBus low power I/O expander with interrupt output and configuration registers. 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 contains a set of 8bit I/P, O/P, configuration and polarity inversion registers. At power up all IOs default to inputs. Each IO can be configured as either I/P or O/P by changing the corresponding bit in configuration register. The data for each I/P or O/P is stored in corresponding I/P or O/P register. The polarity inversion register can be programmed to invert the polarity of the input register. The NCA9535 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.

• Operating power supply voltage range of 1.65V to 5.5V
• 2.5µA (maximum) low standby current consumption
• I²C-bus to parallel port expander and 5V tolerant I/Os
• 16 I/O pins which power up configured in input state
• Allows up-to eight devices to share the same I²C-bus/SMBus and no glitch on power-up
• Open-drain active LOW interrupt output
• 400KHz fast-mode I²C-bus and internal power-on reset
• Latched outputs with 25mA drive maximum capability for directly driving LEDs
• Latch-up performance exceeds 100mA per JESD78, Class II
• 24 pin HWQFN package and temperature range from -40°C to +85°C