General description
●The PCA9539A is a low-voltage 16-bit General Purpose Input/Output (GPIO) expander with interrupt and reset for I2C-bus/SMBus applications. NXP I/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum, for example, in ACPI power switches, sensors, push buttons, LEDs, fan control, etc.
●Features and benefits
●■ I2C-bus to parallel port expander
●■ Pin and function compatible with PCA9539
●■ Operating power supply voltage range of 1.65 V to 5.5 V
●■ Low standby current consumption:
●♦ 1.5 A (typical at 5 V VDD)
●♦ 1.0 A (typical at 3.3 V VDD)
●■ Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
●♦ Vhys = 0.10 VDD (typical)
●■ 5 V tolerant I/Os
●■ Active LOW reset input (RESET)
●■ Open-drain active LOW interrupt output (INT)
●■ 400 kHz Fast-mode I2C-bus
●■ Internal power-on reset
●■ Power-up with all channels configured as inputs
●■ 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 exceeds JESD22
●♦ 2000 V Human Body Model (A114-A)
●♦ 1000 V Charged-Device Model (C101)
●■ Packages offered: TSSOP24, HWQFN24
