NCA9555BYHP

NCA9555BYHP is a low-voltage 16bit I²C and SMBus I/O expander with interrupt output and configuration registers. It is designed for a wide voltage range of 1.65V to 5.5V with interrupt and default pull-up resistors on GPIOs. This GPIO expander provides 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. It contains a set of 8bit 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.

• I²C-bus to parallel port expander, supply current is 2.5µA maximum at (VCC = 3.6V to 5.5V)
• 5V tolerant I/Os, 16 I/O pins which power up configured in input state with weak pull-up resistor
• Open-drain active LOW interrupt output (INT), 400KHz fast-mode I²C-bus
• Internal power-on reset, no glitch on power-up, CMOS logic switching levels
• Latched outputs with 25mA drive maximum capability for directly driving LEDs
• Latch-up performance exceeds 100mA per JESD78, class II
• Operating temperature range from -40°C to +85°C
• Package style is HWQFN24