PCAL9539AHF,128

PCAL9539AHF,128 is a low-voltage 16bit I²C-bus and SMBus low power I/O port with interrupt and reset. It is a low-voltage 16bit general purpose input/output (GPIO) expander with interrupt and reset for I²C-bus/SMBus applications. NXP I/O expander provides 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. In addition to providing a flexible set of GPIOs, the wide VDD range of 1.65V to 5.5V allows them to interface with next-generation microprocessors and microcontrollers where supply levels are dropping down to conserve power. The PCAL9539A contains the PCA9539 register set of four pairs of 8-bit configuration, input, output, and Polarity inversion registers, and additionally, the PCAL9539A has Agile I/O, which are additional features specifically designed to enhance the I/O.

• I²C-bus to parallel port expander
• Supply voltage range from -0.5 to +6.5V, output voltage range from -0.5 to +6.5V
• Schmitt-trigger action allows slow I/P transition/better switching noise immunity at SCL/SDA I/Ps
• Active LOW reset input (RESET, active low), open-drain active LOW interrupt output (INT, active low)
• Internal power-on reset, power-up with all channels configured as inputs
• No glitch on power-up, ESD protection exceeds JESD22
• Latched outputs with 25mA drive maximum capability for directly driving LEDs
• Latch-up performance exceeds 100 mA per JESD78, Class II
• 2000V human body model (A114-A), 1000V charged-device model (C101)
• HWQFN24 package, ambient temperature range from -40°C to +85°C